《悟真篇闡幽》

The Wuzhen Pian (Awakening to Reality) is a foundational Neidan (internal alchemy) scripture authored during the Song Dynasty by the Daoist master Zhang Boduan (style name Pingshu, from Tiantai), revered as the Purple Yang Perfected One. As a disciple of Patriarch Liu Haichan and founder of the Southern Lineage of Daoism, Zhang composed this work out of deep concern that people misunderstood the true essence of the Golden Elixir (Jindan) path, often straying into heterodox practices. His text guides cultivators toward life's ultimate fulfillment through investigating cosmic principles and refining one's innate nature.

This classic traces its conceptual roots to the Yinfu Jing (Scripture of the Hidden Accordance) and Daode Jing (Classic of the Way and Virtue), while its cultivation methods draw from the Zhouyi Cantong Qi (Token for the Agreement of the Three). To avoid revealing celestial secrets, Zhang employed symbolic language—using terms like "medicinal ingredients and alchemical vessels," "firing times," and metaphors such as "Qian-Kun and Kan-Li" (hexagrams representing cosmic forces) or "Dragon-Tiger and Lead-Mercury." Ironically, this deliberate obscurity made the text harder to comprehend. The "reality" (zhen) referenced in the title points to humanity's innate authentic nature—the original unity of xing (spiritual nature) and ming (vital life) that requires holistic cultivation. Active methods perfect the life-nourishing (ming) practice, while Wuwei (non-action) leads to awakening one's spiritual nature (xing); mastering both restores primordial wholeness.

The text systematically divides into two frameworks: the xing lineage elucidates the wondrous awareness inherent in all beings regardless of spiritual attainment, while the ming lineage details the Golden Elixir techniques for transcending ordinary existence—methods requiring a genuine master's guidance. Later misinterpretations unfortunately reduced the teachings to mere Waidan (external alchemy) or sexual practices at their worst, or promoted partial cultivation methods at best, obscuring the patriarch's original intent for centuries.

Originally structured with meticulous cultivation stages, the text's sequence was disordered by later editors. The current edition, based on the Daoist Canon version, reorganizes the content according to the Golden Fluid Reverted Elixir's authentic progression. The opening sixteen seven-character poems symbolically represent the "two eights making one pound" principle—the alchemical balance of Yin-Yang energies.

This scripture primarily speaks of the fleeting and impermanent nature of human life. Without pursuing the Great Dao (referring to the fundamental path of cultivating the Golden Elixir to transcend life and death), even the most brilliant talents cannot be considered true heroes. A hundred years pass as swiftly as a flash of lightning, and the physical body is as illusory as a bubble. If one merely chases fame, wealth, and status, they will unknowingly wither away. Even mountains of gold and silver cannot buy a reprieve from impermanence (referring to death).

Human life may seem to span a century, yet its length, fortunes, and misfortunes remain unpredictable. Yesterday, one might have paraded proudly on horseback through the streets, but today, they could lie in a coffin. Neither spouse nor possessions can be taken beyond death, yet the karmic debts accumulated in life must be borne alone. Without seeking the Great Medicine of the Golden Elixir (referring to the fundamental substance attained through cultivation to transcend life and death), how can one escape the cycle of rebirth? Even if one encounters the true method but fails to practice it, that is true folly.

Here, the emphasis is on cultivating the Golden Elixir as the key to transcending life and death. The first section speaks of how no one can avoid the impermanence of life and death, while the second points out that only through cultivating the Golden Elixir can one surpass the cycle of rebirth and dissolve karmic burdens. The "Great Dao" refers broadly to the fundamental principles of cultivation, while the "Great Medicine" specifically denotes the concrete methods of refining the Golden Elixir. Among the methods for liberating sentient beings, the Golden Elixir is the swiftest path. Thus, seeking an enlightened master to cultivate the Golden Elixir is, in essence, a means to save one's life—how can it be delayed?

True immortality cultivation aims to attain the rank of Celestial Immortal (the highest among the five grades of immortals), and the Great Dao of the Golden Elixir is the most fundamental method. When the two energies of Yin and Yang (represented by Kan and Li) merge within the body, and the energies of the Five Phases (Wood, Fire, Earth, Metal, Water) are complete, one reaches the state of the Dragon and Tiger uniting (symbolizing the harmony of Water and Fire). Using the Central Earth of Wu-Ji (referring to the mediating role of true intention) as a bridge, Yin and Yang harmonize like husband and wife. Once cultivation reaches perfection, one may ascend to the celestial realms, riding phoenixes amid clouds of nine-colored radiance.

This passage explicitly clarifies that the Golden Elixir is the true guide to immortality cultivation. The earlier mentions of the "Great Dao" and "Great Medicine" both refer to the Golden Elixir, which is now plainly stated. When ordinary people speak of immortality, they often think of alchemy (Waidan, or external alchemy), dual cultivation with a partner, or assume that breathing exercises and moving Qi constitute true practice—such shallow views are laughable. It must be understood that Daoism classifies immortals into five grades (Celestial, Earthly, Divine, Human, and Ghost Immortals), while Buddhism speaks of ten kinds of immortals. If one merely seeks longevity without cultivating the root, they will still fall when their merit is exhausted.

Practitioners often feel lost, uncertain which path to follow. In truth, the supreme cultivation path leads only to the attainment of Celestial Immortality (Tianxian). This Celestial Immortality refers neither to the five grades of immortals dwelling eternally in the Ten Continents and Three Islands (legendary Daoist paradises), nor to the ten types of immortals who neglect true awakening and may fall when their merit is exhausted. It signifies the supreme and ultimate True Immortal.

The "celestial" realm mentioned here is not the desire realm or form realm (the first two realms in Buddhist cosmology) where ordinary beings dwell—these are still realms of imperfection. Nor is it the formless realm attained through heterodox practices like the "state of neither perception nor non-perception" (a meditative state). Even celestial realms where practitioners cling to emptiness and must still reincarnate after eighty thousand eons cannot compare to what we call the "Heaven of Ultimate Truth."

The Book of Changes (Yijing) uses the Qian (Heaven) hexagram to symbolize this celestial state—Qian represents the pure Yang body, utterly refined and eternally incorruptible, like the indestructible Dharma-nature or the immortal primordial spirit (Yuanshen) that endures through countless eons. The Qian metaphor signifies celestial purity through Yang, and indestructibility through gold—yet this refers neither to the heavens within the three realms nor to mundane gold and silver.

Thus we understand that Celestial Immortality is Golden Immortality (Jinxian), attained through cultivating the Great Dao of the Golden Elixir (Jindan). "Gold" symbolizes the indestructible Dharma-body, while "elixir" represents perfect ultimate reality. The Golden Elixir path begins with conditioned practices to reach unconditioned realization, cultivating both life (ming) and nature (xing) until achieving the supreme state where form and spirit both attain perfection. Practitioners must first establish this fundamental orientation to find the correct starting point. Therefore, those who study immortality must aim for Celestial Immortality—only the Golden Elixir represents ultimate truth.

Golden Elixir cultivation always revolves around the two principles of Kan (Water) and Li (Fire) from the Eight Trigrams (Bagua). Postnatal Kan and Li correspond to prenatal Qian (Heaven) and Kun (Earth). The prenatal state is called nature-life (xingming), the postnatal state emotional-nature (qingxing)—both ultimately reduce to body and mind. The mind is originally pure Yang (prenatal Qian-nature), containing the essence of supreme Yin; when stirred by external objects, nature transforms into emotion—this is the Yin within Li (wood within fire). The body is originally pure Yin (prenatal Kun-life), containing the Qi of supreme Yang; in stillness, life transforms into nature—this is the Yang within Kan (metal within water). When Kan and Li interact, emotional-nature naturally merges. Metal's nature is fierce as a tiger, wood's emotion gentle as a dragon—water and fire perfectly manifest Kan and Li's essential qualities.

This passage explains the core principle of Golden Elixir (Jindan) formation in Neidan (internal alchemy) practice, using the mutual generation and harmonization of the Five Phases (Wood, Fire, Earth, Metal, Water) as metaphors for the cultivation process. Metal (representing the West) and Wood (representing the East) symbolize the interaction between Kan (Water) and Li (Fire). When these four elements—Metal, Wood, Water, and Fire—converge in the Central Palace (the spleen-earth of the center), they complete the Qi (vital energy) of all Five Phases.

During cultivation, the body and the mind-spirit (symbolized by the tiger and dragon) must unite internally and externally. However, this fusion does not occur naturally at first; it requires the mediation of "Central Yellow True Intention" (Zhonghuang Zhenyi), represented by the earthly energies of Wu and Ji. Like a matchmaker facilitating marriage, this True Intention perfectly unites body and mind. When the "Three Families" (Jing/essence, Qi, and Shen/spirit) meet, they form the "Sacred Embryo" (Shengtai), the nascent form of the Golden Elixir. Through repeated refinement and nurturing, the practitioner completes the "Ninefold Revolving Elixir" (Jiuzhuan Huandan) process.

When the Golden Elixir matures, it emits radiance, ascending counterflow from the Mysterious Pass (Taixuanguan, the lower Dantian) to the Celestial Valley Cavity (Tian'gu, the upper Dantian), ultimately reaching the highest state. This is not the worldly notion of ascension but an internal transformation and rebirth. The true path to celestial immortality (Tianxian) lies precisely in cultivating the Golden Elixir.

The text further elucidates the principle through the secret formula "Three-Five-One" (San Wu Yi): the East's Three (Wood) plus the South's Two (Fire) make Five; the North's One (Water) plus the West's Four (Metal) also make Five; and the Central Earth (Wu-Ji) inherently contains the number Five. When these three groups (Wood-Fire, Metal-Water, and Central Earth) unite, it resembles the formation of an infant. After ten months of gestation-like cultivation, one attains sagehood. This principle originates from the Five Phases numerology of the Hetu (River Chart): Eastern Wood corresponds to the Hun (ethereal soul), Southern Fire corresponds to the Shen (spirit), and their union creates the dynamic heart-mind, where Yang contains Yin.

In essence, this passage reveals that Golden Elixir cultivation achieves the sublimation and transformation of life by harmonizing the Five Phases and uniting the Three Primordials (Jing, Qi, Shen).

This passage elucidates the cultivation principles of Jing (essence), Qi (vital energy), and Shen (spirit) within the human body. The Eastern number three (Wood) combined with the Southern number two (Fire) sums to five, while the Western number four (Metal) corresponds to the body's Po (corporeal soul), and the Northern number one (Water) corresponds to Jing. When Metal (Po) and Water (Jing) intermingle—just as Yin and Yang unite—they form an integrated system containing the mysteries of life.

The central Earth (Middle Palace) governs the four phases of Wood, Fire, Metal, and Water, harmonizing Shen (spirit), Hun (ethereal soul), Po, and Jing to create an autonomous, complete system. When the True Intention (Original Spirit, Yuanshen) unifies body and mind at the Central Yellow (Middle Dantian), the three treasures—Jing, Qi, and Shen—merge to produce the "True Seed" that forms the "Sacred Embryo." This is the state described in the Cantong Qi (The Seal of the Unity of the Three) as "the three substances becoming one family, all returning to Wu-Ji (the central Earth)."

The postnatal heart corresponds to prenatal Jing, the postnatal body to prenatal Qi, and postnatal consciousness to prenatal Shen. Initially, the Taiji (Supreme Ultimate) contained these three in undifferentiated unity. Later, they divided into Yin and Yang energies, with the Middle Palace forming the triad of Heaven-Earth-Human, which further differentiated into the Four Symbols and Five Phases, giving rise to all transformations in the world. Following this process of differentiation leads to the ordinary cycle of life, while reversing it through cultivation allows one to form the Golden Elixir (Jindan) and transcend worldly existence.

When Jing, Qi, and Shen genuinely fuse, one returns to the original state of Taiji. Through further refinement and nurturing, once the Sacred Embryo matures and genuine Qi becomes abundant, transcendence is achieved. The phrase "Taiyi contains genuine Qi" refers precisely to this state of returning to the origin.

Finally, the text emphasizes that cultivation must balance both Yin and Yang, much like plants require green leaves (Yang) and red flowers (Yin) to thrive. It cautions practitioners against haphazard practice if they fail to grasp the principle of Yin-Yang harmony. This chapter synthesizes concepts from the Hetu (River Chart), Zhouyi (Book of Changes), and Cantong Qi, forming the core essence of the entire work.

The yin energy (feminine force) in the cosmos was originally undivided, later differentiating into yin and yang qi, from which endless permutations of yin-yang interactions arose. From the grand movements of heaven and earth to the minute growth of all beings, nothing operates without this interplay. Even insentient things like plants require yang qi to initiate movement and yin qi to respond before they can blossom, grow leaves, and emit fragrance.

When leaves first emerge green, they appear yin in nature, yet it is yang qi that first propels their tender unfurling—demonstrating yang's dominance over yin. When flowers bloom red, they seem yang in appearance, yet it is yin qi following yang qi that enables their full blossoming—revealing yin's compliance with yang. This phenomenon aligns with the principles of the Hetu (ancient cosmic diagram): "Heaven's One generates Water" (the celestial number one produces the water element), while "Earth's Six completes it" (the earthly number six envelops it), forming an outer-yin, inner-yang structure akin to green leaves. Conversely, "Earth's Two generates Fire" (the earthly number two produces the fire element), while "Heaven's Seven completes it" (the celestial number seven envelops it), forming an outer-yang, inner-yin structure resembling red flowers.

The human body follows the same pattern. The Kan trigram (representing kidney-water) is externally empty yet internally solid, symbolizing the physical form—not the illusory body composed of the four elements (earth, water, fire, wind), but the wondrous existence (miao you) within absolute emptiness (zhen kong). The Li trigram (representing heart-fire) is externally solid yet internally empty, symbolizing consciousness—not the deluded mind influenced by the six dusts (sights, sounds, smells, tastes, touches, and thoughts), but the absolute emptiness within wondrous existence. Ordinary people chase sensory experiences through the six roots (eyes, ears, nose, tongue, body, and mind), generating worldly attachments, while their consciousness clings to external realms, breeding delusions. Unaware, they live by this inertia, trapped in the cycle of birth and death.

Cultivators of the Dao focus on reverse practice: extracting the true yang (primordial yang qi) from Kan and transforming the true yin (primordial yin qi) within Li, unifying body and mind to return to the primordial source (original state). These two qi—when followed, lead to mundanity; when reversed, lead to sagehood. The principle shares one root, but the practice requires balanced effort. Some cling to illusory forms as reality; others fixate on lifeless emptiness as true mind. Both err by failing to grasp true yin and yang, acting blindly—like driving north while seeking south.

The Patriarchs warn all seekers: you must find an enlightened teacher, exhaustively investigate the roots of xing (nature) and ming (life), thoroughly comprehend the mysteries of yin-yang, and deeply understand the workings of creation. Never cultivate one aspect alone or practice blindly. The words "yin" and "yang" embody what the Xi Ci of the I Ching calls "one yin, one yang—this is the Dao." In the primordial realm, they manifest as Qian (heaven) and Kun (earth); in the human body, as xing (nature) and ming (life). In the conditioned realm, they appear as Kan (water) and Li (fire); in the person, as body and mind. Ultimately, Kan and Li are the embodiments of Qian and Kun, just as body and mind are the vessels of xing and ming. In nature’s imagery, they are the sun and moon revolving, water and fire harmonizing; in alchemical terms, they are lead (true yang in the kidneys) and mercury (true yin in the heart) uniting.

This passage critiques several common misconceptions in Daoist cultivation. First, it points out how some practitioners, upon encountering terms like "Yin-Yang," "husband and wife," or "male and female" in the classics, mistakenly associate them with heterodox theories of dual cultivation. Such distortions of scriptural meaning that mislead others will bring karmic retribution.

The text emphasizes that cultivating only the Yin essence (referring to one-sided pursuit of singular methods) is not the true path. Those who focus solely on seated meditation, breath regulation, daoyin techniques (health exercises imitating animal movements like bears or birds), or ingesting the essence of sun and moon are like paupers searching for treasure or madmen running wildly—only drifting further from the true Dao.

Authentic cultivation requires understanding the true nature of "body and mind": the mind corresponds to the true Yin within the Li trigram (one of the Bagua), while the body corresponds to the true Yang within the Kan trigram. When described with inorganic metaphors, these are called lead and mercury; with organic metaphors, they are termed dragon and tiger (Neidan terminology). The core of cultivation lies in returning to life's origin, tracing back to the prenatal state before one's parents conceived them (referring to one's fundamental nature).

Common errors among practitioners include: first, mistakenly taking the Yin essence from the Li trigram as one's true nature while failing to seek the true Yang from Kan for transformation; second, becoming attached to various external cultivation forms. Even if these methods can achieve mental clarity, they ultimately cannot transcend rebirth or attain the indestructible vajra body.

The author stresses that genuine cultivation must trace life to its source and return to the prenatal state. This is the true "Medicine King" (referring to the most fundamental cultivation method). Without recognizing this foundational principle, one cannot truly subdue body and mind, making ultimate enlightenment unattainable.

Heaven and Earth unite through Yin and Yang, and human nature (xing) and life (ming) were originally an undivided whole, like a complete Taiji (Supreme Ultimate) diagram. Yet after birth, this primordial state is disrupted: the Qian hexagram (pure Yang) transforms into the Li hexagram (Yang outside, Yin within), while the Kun hexagram (pure Yin) becomes the Kan hexagram (Yin outside, Yang within). From an infant's first cry, nature and life begin their separation.

A Daoist practitioner must first seek guidance from an enlightened master to comprehend the original source of vital energy (Qi) received at life's inception. Through cultivation, one restores the Yang line from the Kan hexagram to the Li hexagram, recreating Qian, while returning the Yin line from the Li hexagram to the Kan hexagram, restoring Kun. Only through this process can one return to the primordial state of unified nature and life.

This practice is called "seven returns and nine restorations" — the fundamental method for refining the Golden Elixir (Jindan) that forges an indestructible vajra body. The work of return need not deliberately trace back to life's first moment, for ordinary people's vitality already circulates endlessly through the body formed by eyes, ears, nose, and tongue. With constant inner observation and deepening self-reflection, sudden awakening reveals one's original face before parental conception. Continued cultivation preserves this state — the true path of returning to the source from which the Golden Elixir arises. One who awakens to this intrinsic mind becomes the true Medicine King.

All inherently possess the elixir of immortality, yet the ignorant discard it needlessly. When celestial nectar (primordial true Qi) descends, Heaven and Earth naturally unite in Yin-Yang harmony; when yellow sprouts (the nascent Golden Elixir) emerge, Kan and Li energies spontaneously merge. How could a frog at the bottom of a well comprehend dragon palaces? Would sparrows nesting in hedges understand the phoenix's abode? When the Golden Elixir matures, golden light naturally fills the chamber — why seek external herbal concoctions?

This chapter emphasizes that the Golden Elixir requires no external search. Nature and life themselves constitute the medicine's foundation, perfectly complete in all beings before parental conception. The crux of Laozi's saying "the valley spirit never dies" lies precisely in self-return. Deluded by habitual tendencies, people madly pursue longevity externally, remaining unawakened until death. Only through a true master's guidance does one realize this body-mind itself is the great medicine of immortality — when Yin and Yang harmonize, the true seed (Golden Elixir) emerges as naturally as celestial nectar descending from heaven.

This passage explores the profound mystery of the "Primordial Qi" (Xiantian Yiqi), the cosmic source energy in Daoist Neidan (internal alchemy) practice. The text employs two potent metaphors: "yellow sprouts" representing the true Yang energy arising from the earth (symbolizing the body's vital forces), and "sweet dew" descending from heaven (symbolizing the primordial energy from the void). When these two energies converge in the Dantian (the body's energy center), they produce the precious "Great Medicine" (Dayaо), the fundamental substance of internal alchemy.

Yet ordinary minds remain trapped by superficial appearances, like quails confined by hedges or frogs at the bottom of a well, blind to this inner treasure. In truth, every person inherently possesses this primordial energy, though most fail to recognize it. Just as base metals can be refined into pure gold, through cultivation one may transform the turbid energies of acquired existence into the pristine Qi of primordial nature. But most practitioners abandon the root to chase the branches—as foolish as rejecting a house filled with gold to burn straw for warmth.

Authentic cultivation requires neither external pursuit of the "Three Yellows and Four Divinities" (traditional Waidan/external alchemy ingredients) nor deliberate searches for rare herbs. The true secret lies in allowing the body's Yin and Yang energies to unite naturally—like moonlight reflecting on deep pools or sunlight crowning mountain peaks. The text's references to "lead and mercury" (Qianhong, alchemical terms representing bodily Yin-Yang energies) denote not ordinary metals but the pure primordial forces within.

The essence of practice resides in comprehending the cosmic interplay symbolized by the Kan (Water) and Li (Fire) trigrams. The true water within Li (symbolizing heart fire) naturally descends, while the true fire within Kan (symbolizing kidney water) naturally ascends—this is the Dao of heaven and earth. When these two currents meet and merge, they achieve the ideal state of "water and fire in perfect balance" (Shuihuo Jiji), the harmonious union of Yin and Yang.

This scripture elucidates the core principle of "the mating of Kan and Li" (water and fire in harmony) in Daoist Neidan (internal alchemy) practice. When heaven and earth were formed, the celestial One (yang) generated water, while the earthly Six (yin) formed the Kan trigram; the earthly Two (yin) generated fire, while the celestial Seven (yang) formed the Li trigram. In cultivation, the yang line in the Kan trigram (representing true lead) combines with the yin line in the Li trigram (representing true mercury), just as two plus eight equals ten (the weight of one jin), naturally merging into one.

When the Qi (vital energy) of Kan and Li are about to unite, the true yang Qi from the kidney water (Kan trigram) rises from the lower Dantian (North Sea), like the sun shining from the depths of a deep pool, capable of dispelling all yin and malevolent energies. As this true yang ascends and merges with the true yin within the heart fire (Li trigram), the Golden Elixir (Neidan) is formed. This is akin to the moon reflecting the sun's light when it first appears in the western sky (the direction of Geng), marking the initial emergence of the "medicine sprout" (internal elixir), which must be gathered and refined at the right moment.

The yang energy within Kan is true lead (original essence), while the yin essence within Li is true mercury (original spirit). Kan and Li are thus lead and mercury, and lead and mercury represent the body and mind. The essence of body and mind lies in Jing (essence) and Qi, and the root of Jing and Qi is in nature and life (xingming). When these two merge, they form the most purified consciousness, the Shen (spirit). Only by understanding this principle can practitioners avoid being misled by ordinary alchemical methods (such as the cinnabar and mercury used in Waidan, external alchemy).

The true method of the Golden Elixir is infinitely profound, and its key lies in comprehending the principle of "reversal"—allowing the Qi of Kan and Li to unite in an inverted manner. Although everyone possesses the innate foundation of nature and life, the ability to retain the original spirit in the "golden cauldron" (upper Dantian) and condense the original essence in the "jade pool" (lower Dantian), while applying the skill of "fire timing" (breath regulation) in cultivation, ultimately manifests the Golden Elixir within the body, luminous as the moon in a deep pool. This is what distinguishes the path of cultivation from that of ordinary people. The chapter emphasizes that Neidan practice must grasp the union of the innate true lead and true mercury, for this is the fundamental principle of the Golden Elixir path, not the pursuit of external substances.

This passage elucidates the transformative relationship between "internal medicine" (neiyao) and "external medicine" (waiyao) in Daoist Neidan (internal alchemy) practice. What is called "supreme authenticity" refers to the internal medicine, which appears different from ordinary substances but is actually a skillful transformation through postnatal application. Returning to original authenticity through this transformation constitutes the external medicine. As Laozi said, "I alone am different from others in valuing nourishment from the Mother"—this precisely refers to this principle.

From the perspective of the prenatal state, the Qian hexagram (representing pure Yang) originally dominates while the Kun hexagram (representing pure Yin) serves as the guest. But when the central lines interchange to form the Li and Kan hexagrams, the host-guest relationship reverses: the volatile Wood-natured Mercury (symbolizing the Shen/spirit) in the Li hexagram becomes the guest within the host, while the stable Metal-natured Lead (symbolizing Jing/essence) in the Kan hexagram paradoxically becomes the host within the guest. Ordinary people only see how Qian and Kun invert to become Kan and Li, with Metal sinking and Wood floating seemingly destabilizing the host-guest positions, unaware that another inversion can restore the original Qian-Kun configuration.

The outer form of Li belongs to Qian and is called the "golden cauldron," containing the easily scattered cinnabar Mercury (Shen) that represents the heart's position. The outer form of Kan belongs to Kun and is called the "jade pond," containing the stable silver-in-water (original Jing) that represents the body's position. The Shen constantly flows and is hard to control—to retain it requires using the original Jing from the Kan palace (lower Dantian). When the heavy Metal nature from the Kan palace counteracts the volatile Mercury nature, it stabilizes the Shen, achieving the quiescent state of body-mind unity.

The key to harmonizing body and mind lies in applying "true intention" (zhenyi), using the technique of "exchanging floating and sinking, inverting host and guest" to make the two energies converge momentarily. During practice, simply through "turning the light around" (the neiguan method of inner observation), the Golden Elixir (jindan) can instantly manifest in the Northern Sea (lower Dantian), shining brightly like the full moon. The great medicine (primordial Qi) produced from the initial interaction of Kan and Li forms the foundation for Elixir Return practice—this is the most fundamental truth.

Understand that the root of producing the medicine lies in the southwest direction (Kun position, indicating the lower Dantian). When original Jing first stirs (Lead encountering Gui-water), it must be gathered promptly; when essence-energy reaches fullness (Metal meeting the full moon), the firing process must be carefully regulated. These all describe the crucial timings and operational methods for transforming Jing, Qi and Shen in internal alchemy practice.

This passage explains the crucial timing (fire phases) in cultivating the Golden Elixir (Jindan). While earlier texts describe the "great medicine" of the elixir as resembling the moon appearing in a deep pool, they fail to specify its exact origin, the optimal moment for collection, or proper nurturing methods—leaving practitioners without practical guidance.

The true essence of the Golden Elixir emerges from beneath the water's surface, hence the metaphor of a river's source. This "great medicine" originates from the Kun-earth (the lower Dantian in the abdomen), corresponding to the southwest direction. Its formation follows the moon's phases: when the moon reaches fullness in the Qian-Jia position (east, representing the full moon), it begins waning (last quarter moon). As yin energy grows in the Xun-Xin position, moonlight withdraws and all things return to stillness. When the moon disappears in the Kun-Gui position (north, representing the new moon), it gradually reappears (first quarter moon) as yang energy stirs in the Zhen-Geng position—marking the sprouting of the "medicine shoot" and the revival of vital force.

Understanding where this internal medicine emerges allows one to grasp the precise harvesting moment. The口诀 (mnemonic verse) states: "To know the medicine's birthplace, seek its homeland in the southwest." When the great medicine manifests, it's called "true lead" (primordial Jing-essence)—profound and elusive, embodying water's nature. Water divides into Ren-water (clear yang water) and Gui-water (turbid yin water), with the midnight hour (Zi时) holding the secret of heart-mind resonance. When true intent (focused awareness) first stirs, it belongs to yang; a second transition turns it yin. Once yin energy arises, the "true seed" (foundation of cultivation) scatters. Thus, harvesting must occur before yin emerges—hence the saying: "When lead meets Gui's birth, swiftly gather."

Emerging true lead is also called "true gold." This indistinct "gold within water" (primordial Qi) has tender and mature states: tender as the waxing crescent, mature as the waning full moon. The perfect lunar phase requires口诀 guidance—when true Qi first condenses like the full moon's peak. Missing this moment dissipates the Qi, so harvesting must precede yang's dispersal: "When gold encounters the distant gaze, it becomes unfit for tasting." This describes the critical harvesting technique when the "living Zi hour" (physiological awakening during practice) arrives.

This passage explains the method of nurturing the "Great Medicine" (the innate vital essence produced at advanced stages) in Daoist Neidan (internal alchemy) practice. After gathering the Great Medicine, one must use true intention (pure consciousness free from distractions) to guide it upward to the Heavenly Valley point at the crown, then direct it into the Yellow Court (middle Dantian). During this process, one must shut the six gates (eyes, ears, nose, tongue, body, and mind) as securely as building dikes against floods, strictly preventing the leakage of essence and Qi.

During cultivation, the Great Medicine must be continuously enveloped by the light of Shen (the observing awareness of inner vision) without a moment's interruption. When true lead (the original Jing from the kidneys) rises to the cauldron and furnace (upper Dantian), it must immediately combine with the flowing pearl of the sun (the original Shen from the heart). Only then can Shen and Qi mutually protect each other, breath and mind rely on one another, lead and mercury (essence, Qi and spirit) fuse together, and body and mind unite. This is what's called "sealing it in the earthen cauldron (Dantian), then matching it with the flowing pearl" - the art of nurturing the Great Medicine.

The measure of the Great Medicine isn't calculated by weight; when we say "one pound," it refers to a state of complete fullness. The formation of the Golden Elixir requires perfect harmony between the two qi of yin and yang (the two crescents of true qi), with metal and water equally balanced. Insufficient fire makes the medicine immature, while excessive fire makes it overdone - the timing must be precisely right. When gathering the medicine, we call it "medicine," yet the medicine inherently contains the proper firing process. True fire has no fixed hour - "regulation" means achieving absolute equilibrium. When yin and yang qi merge, they must be adjusted through natural breathing. Scattered intention makes the fire too cold, while random thoughts make it too hot - one must maintain a state that's neither warm nor cool.

Using fire to refine medicine means governing Qi with Shen - only then can the Golden Elixir be perfected. Hence the saying: "One pound of medicine requires the harmony of yin and yang." This passage reveals the core principles of Golden Elixir cultivation, though the secret techniques of fire regulation cannot be fully conveyed in writing and must be transmitted personally from master to disciple. Yet one must understand that the true mystery of gathering medicine lies precisely in the moment when thoughts become still - not deliberately gathering is true gathering, not forcibly taking is true taking. This is the most subtle secret within fire regulation. Beyond this stage, one enters the phase of returning the elixir (higher stages of cultivation).

The final quatrain explains: When dragon and tiger (heart-mind and kidney Qi) unite, there will be intense reactions, and a mysterious pearl (inner elixir) will form at the body's center. This occurs as naturally as fruit ripening on branches or a fetus developing in the womb. Practitioners must understand the circulation of Qi between north and south (the Governing and Conception vessels) follows the transformations of the Bagua (Eight Trigrams), while the firing times of dawn and dusk must accord with celestial rhythms. True cultivators remain hidden within bustling cities - why must one retreat to remote mountains alone?

This chapter discusses the formation of the inner elixir (the core achievement of Neidan practice) through the union of Yin and Yang, representing the ultimate stage of the Golden Elixir's refinement process. The previous chapter described the attainment of the great medicinal ingredient (Golden Elixir), which now must be nurtured in the Yellow Court (the central region of the Dantian) — metaphorically called the "earthen cauldron" (symbolizing the alchemical vessel). Here, the Shen (spirit) and Qi (vital energy) mutually protect each other like mother and child, returning to the root of life.

When stillness reaches its extreme, dynamic transformation occurs. At the arrival of the true midnight hour (the optimal practice period), one must activate the River Chariot (the pathway of genuine Qi), gathering the true fire to carry the golden Jing (essential energy) from the Tail Gate (base of the spine) up to the Celestial Valley point (crown of the head). This process should be as intense as dragons and tigers locked in combat, with tempestuous waves powerful enough to shake heaven and earth. After the Qian (Heaven/Yang) and Kun (Earth/Yin) complete their union, the drop of golden liquid (essence of the Golden Elixir) still returns to the center of the Yellow Court. Hence the verse: "When tigers leap and dragons surge through raging winds and waves, the Mysterious Pearl is born in the central rightful position."

Subsequent practice requires continuous gentle nurturing — like a dragon guarding its pearl or a hen incubating her eggs — maintaining inner observation in silent awareness, neither forcibly pursuing nor carelessly neglecting. When the Mysterious Pearl (Golden Elixir) takes form, containing the primordial energy of Taiyi (the primal Qi), it resembles fruit ripening on the branch or an infant naturally growing toward transcendence. Thus the saying: "Fruit on the branch will surely ripen; the child in the womb knows no difference."

In the innate cosmic arrangement, Qian (Heaven) resides in the south and Kun (Earth) in the north. But in the conditioned world, heaven and earth cease interacting, creating the Pi hexagram (symbolizing obstruction). Through cultivation, we restore their union, transforming Pi into the Tai hexagram (symbolizing harmony), effectively inverting the entire celestial hexagram cycle. The so-called "dawn and dusk" represent alternating movement and stillness: when Yang energy activates, we stoke the fire (intensify focus); when the six Yang lines fully manifest, we return to stillness. When Yin energy dominates stillness, we bank the fire (relax intention); when the six Yin lines appear, movement begins anew. This cyclical advance and retreat follows the command of the Celestial Pivot (cosmic axis).

While the celestial cycle constantly revolves, the Celestial Pivot remains unmoved. Within the human body, this corresponds to the primordial Shen in the Celestial Valley point — eternally aware yet eternally serene. All refinements of firing times aim to align with this unmoving core. Hence the verse: "Dawn and dusk firing times accord with the Celestial Pivot."

The essence of Golden Elixir practice lies in achieving true stillness, yet genuine stillness isn't lifeless separation from movement. Solitary mountain practice resembles refining single elements, while finding stillness within worldly motion constitutes the true art of elixir refinement. Within each person dwells the "Positionless True Being" (original nature), hidden among the six senses (eyes, ears, nose, tongue, body, and mind), sometimes manifesting, sometimes concealed. Authentic practitioners may sit atop thousand-peaked mountains yet never leave the busy crossroads; though seemingly walking daily through bustling markets, they constantly maintain transcendent awareness.

The path of cultivation need not take one far from worldly affairs, just as the North Star remains steadfast while the heavens revolve ceaselessly. True practice does not lie in retreating to remote mountains or sitting in barren stillness—the greater concealment occurs within bustling markets. This reveals that Golden Elixir (Jindan) cultivation—the Daoist art of internal alchemy (Neidan)—is the dual cultivation (Xingming Shuangxiu) of one's innate nature and vital life force, not merely a method focused on a single aspect.

Without understanding the profound mystery of inverting Yin-Yang, how could one grow lotuses in raging flames (symbolizing cultivating true nature amidst turmoil)? Only by drawing the White Tiger (representing metallic essence) back into the body for gentle nurturing can one crystallize an inner elixir radiant as the full moon. Simply guard the alchemical furnace in stillness, observing the firing times (regulation of cultivation's thermal phases), allowing the spirit (Shen) to settle naturally. When turbid Yin energies are completely refined and the Golden Elixir ripens, one transcends the bonds of life and death to attain longevity.

These chapters elucidate how the Golden Elixir's marvel lies in the "inversion method"—a cultivation process reversing ordinary patterns. Mortals' Qi-blood flows conventionally: Liver-Wood generates Heart-Fire; Lung-Metal generates Kidney-Water—this forward cycle fuels desires and ultimately depletes life. Internal alchemy reverses this: making Kidney-Water regenerate Lung-Metal; Heart-Fire regenerate Liver-Wood, thereby transforming destructive forces into vitalizing energy, like lotuses blooming in a burning house (symbolizing successful cultivation amidst peril).

The White Tiger originates from true metal of the Qian palace (head) descending into the Kun palace (abdomen) to form Kan-water (kidney essence). Through cultivation, it is guided back to the Li palace (heart-fire), restoring metallic nature to its origin—this constitutes "elixir reversion." After the great medicinal elixir forms in the Kun furnace (lower Dantian), further refinement purifies it into golden liquid, ultimately returning to the Qian crucible (upper Dantian). Throughout this process, firing regulation relies solely on true breath (innate respiration), not postnatal mouth-nose breathing. When true breath unites with primordial spirit, like stars revolving around the unmoving North Star, one naturally remains undisturbed by external phenomena.

The key to cultivation lies in allowing the breath to flow naturally without clinging to bodily sensations—this is what's called the "natural true fire." There's no need to deliberately watch the alchemical furnace to regulate the fire; simply settle the heart-mind and accord with natural rhythms. The ordinary human body is composed of the four elements of earth, water, fire, and wind—all fundamentally yin energies—combined with delusional thoughts arising from the heart such as greed, anger, ignorance, and arrogance. As long as one hasn't transcended the Three Realms (the Realm of Desire, the Realm of Form, and the Formless Realm), these remain the cages that bind people.

When one attains that initial spark of prenatal elixir seed (the first emergence of pure yang qi in cultivation), yin energy begins transforming into yang energy. Through repeated practice, stripping away all yin energies, one ultimately reveals the original luminous countenance—that pure innate nature existing before birth. At this point, one can instantly transcend the constraints of the Three Realms and achieve the indestructible vajra body. Hence the saying: "When yin energy is completely stripped away, the golden elixir is perfected; leaping free from the cage, one attains eternal life."

This chapter discusses the highest state of alchemical practice—returning to primordial simplicity. The principles of previous chapters all culminate here. In truth, the two primary alchemical ingredients—"yellow sprouts" (the true yang within the Kan trigram) and "white snow" (the true yin within the Li trigram)—aren't difficult to find, but those who truly comprehend them must possess profound virtue. The Four Symbols (metal, wood, water, fire) and Five Phases (metal, wood, water, fire, earth) all depend on the central earth virtue (Tu De), while the Three Treasures (Jing, Qi, Shen) and Eight Trigrams (Qian, Kun, Zhen, Xun, Kan, Li, Gen, Dui) all rely on ren water (prenatal original qi). The perfected golden elixir spiritual treasure is incomprehensible to ordinary people—it dissolves yin energies, making one impervious to evil influences. Yet when attempting to transmit this secret in the human world, finding genuine understanding proves difficult.

Practitioners of the Dao must diligently cultivate virtue, for this is the foundation of alchemical work. The Great Dao of the golden elixir enables transcendence of the cycle of rebirth—truly the supreme treasure. But without lofty virtue, how could one bear the weight of the highest Daoist methods? The true yang within Kan is called yellow sprouts; the true yin within Li is called white snow—these two constitute the true medicinal ingredients of the golden elixir. True medicine must be transmitted to true cultivators, and true cultivators will inevitably value virtue. Virtue and practice are like the two wheels of a cart or the wings of a bird—one cannot do without either. The highest virtue manifests as purity, radiance, loyalty, filial piety, moral integrity, and upholding cosmic principles; the most substantial practice involves aiding the distressed, supporting the endangered, and treating others with kindness. Those who cultivate both inner and outer qualities with complete sincerity will naturally move heaven, earth, and the spirits, encountering true masters who transmit genuine methods. Those deficient in virtue may meet true teachers and receive transmissions, but will ultimately fail to achieve completion, often abandoning the path midway or even encountering calamities. As the Yin Fu Jing states: "When petty people obtain the Dao's methods, disaster follows." Viewed through the lens of the River Chart, metal, water, wood, and fire represent the Four Symbols; adding the central earth completes the Five Phases. Metal, water, wood, and fire all transform from the central earth, cycling through before returning to it—demonstrating that earth virtue is the root of cultivation.

The foundation of cultivation lies here, and the ultimate destination is also here. The so-called "Four Symbols and Five Phases" (referring to the Yin-Yang four symbols and the Five Phases of Metal, Wood, Water, Fire, and Earth) all depend on the central Earth position. The "Three Origins" refer to the three treasures: original essence (Yuanjing), original Qi (Yuanqi), and original spirit (Yuanshen). The "Eight Trigrams" (Bagua) consist of the two primary trigrams, Qian and Kun, plus the six offspring trigrams (Zhen, Xun, Kan, Li, Gen, and Dui). In truth, the Three Origins are fundamentally one, and the Eight Trigrams all originate from the same Supreme Ultimate (Taiji). This "One" emerges from the center, transforming from the primordial "One" into true Water, which is the source of all creation.

In alchemical terminology, the "center" refers to true intention (the focused awareness during cultivation), and the "One" refers to true lead (primordial Qi). When true intention remains stable and unmoving, body and mind naturally merge, and from the state of emptiness, the great medicine (the raw material of the Golden Elixir) can emerge—this is true lead. True lead is the Golden Elixir (Jindan), formed by the fusion of two substances: yellow sprout (lead) and white snow (mercury). Through repeated cultivation, the mundane physical constitution can be transformed into a spiritual substance, making one unfathomable to others. By continuously eliminating Yin energy to reach the state of pure Yang, even ghosts and spirits cannot intrude. Without the miraculous efficacy of the great medicine, how could such a state be achieved? Yet without profound virtue (De), who could attain such an accomplishment?

These cultivation secrets cannot be passed from father to son or offered by subject to ruler. Only those of lofty virtue and preexisting affinity with the Dao can receive them. Few in this world truly comprehend their essence, and even the patriarchs of old could not help but sigh repeatedly—lamenting both the rarity of kindred spirits and the difficulty of accumulating virtue and performing good deeds.

The verse reminds us to focus on seeking true lead and not to waste time idly. As long as one can use "earthly soul" (true intention) to subdue "cinnabar mercury" (the heart-mind), one will naturally employ "heavenly soul" (primordial spirit) to control "water-metal" (the essence of the kidneys). When moral cultivation reaches the highest level, even the dragon and tiger (symbolizing the two Qi of Yin and Yang) will submit, and spirits will show reverence. Knowing that one's lifespan will endure as long as heaven and earth, distracting thoughts and worries naturally cease to arise.

This chapter demonstrates that the Golden Elixir can indeed elevate one beyond the mundane world. As mentioned earlier, when the foundation of virtue is solid, the great medicine is not difficult to obtain—the key lies in single-mindedly seeking true lead. True lead is the primordial Qi, emerging from emptiness; it is the great medicine of the Golden Elixir. This spiritual medicine is not found within the four elements (earth, water, fire, wind) of the body, nor can it be sought externally—it must be captured through true intention. When true intention functions and enters the state of chaos, true lead naturally arises. Obtaining true lead means gaining mastery over life, ensuring no time is wasted. Though true lead is fundamentally one Qi, it initially requires the union of two substances (lead and mercury), achieved through the alchemical work of reversing Yin and Yang to merge them into one.

This scripture expounds the core principles of Neidan (internal alchemy) cultivation. Practitioners must first comprehend the interaction of Yin-Yang and the Five Phases (Wood, Fire, Earth, Metal, Water) within the body: the northern region corresponds to Water, which contains Metal (original Jing/essence); the southern region corresponds to Fire, which contains Wood (original Shen/spirit). By refining the Metal of original Jing with the Fire of original Shen, one achieves the union of Metal and Wood and the harmony of Water and Fire, thereby obtaining "true lead" (primordial Qi).

The text employs symbolic language such as "heavenly hun-soul and earthly po-soul" and "dragon and tiger" to represent the dual Yin-Yang energies within the human body. When practitioners subdue their own Yin-Yang energies (yang hun and yin po), the external manifestations of these forces—dragons, tigers, and spiritual beings—will naturally become tame. This accomplishment cannot be achieved through mere ritual techniques alone, but requires profound cultivation of De (Virtue/Power). Those who attain this state become aligned with heaven and earth, transcending the cycle of life and death.

The latter section critiques various erroneous cultivation methods: abstaining from marital relations disrupts Yin-Yang balance; forced fasting empties the digestive system; consuming herbal elixirs proves futile as these belong to the realm of turbid postnatal substances; breathing exercises and visualization techniques differ fundamentally from the Great Dao of the Golden Elixir.

The authentic path to the Golden Elixir lies in obtaining "true lead"—the primordial Qi attained through meditative stillness, which represents the source of creation. Proper cultivation requires the dual cultivation of Yin-Yang and the simultaneous realization of one's original nature (xing) and life force (ming), rather than focusing on isolated aspects or relying on external methods. The text emphasizes that the vast righteous Qi fills heaven and earth, and practitioners should focus on inner cultivation rather than becoming attached to external forms.

This scripture reveals the true essence of cultivating the Great Dao of the Golden Elixir (Jindan), pointing out common misconceptions about spiritual practice. The text explains that people often mistake the postnatal physiological energies of Jing (essence), Qi (vital energy), and Shen (spirit) in the body as the foundation of cultivation, or erroneously believe that breathing exercises and visualization techniques constitute methods for nurturing primordial Qi. In truth, these approaches belong to heterodox paths. Authentic Golden Elixir practice involves uniting true respiration (the innate breathing rhythm) with the original spirit (primordial consciousness), ultimately returning to the Supreme Void (the cosmic origin).

The text emphasizes that the Golden Elixir is fundamentally "true lead" (primordial Qi), yet ordinary people fail to recognize true lead and true mercury (the foundational yin-yang energies), let alone comprehend the genuine meaning of the Golden Elixir. Some misinterpret the teaching of "abandoning the wife" (transcending worldly desires) and instead stray into the deviant path of exploiting yin to supplement yang—a tragic mistake akin to leaping into fire to escape water.

The author clarifies that although countless alchemical scriptures exist, their core principle remains identical: the Golden Elixir's foundation lies in apprehending the profound mechanism of yin-yang interaction. Specifically, this involves nurturing primordial Qi in the Kun position (lower Dantian) and crystallizing the Golden Elixir in the Qian palace (upper Dantian). This isn't some secret doctrine—it's simply that most people remain ignorant of this truth. Those who genuinely understand this principle can transcend mundanity and attain sagehood.

The conclusion summarizes that the Golden Elixir Dao constitutes the swift path to immortality. From the Book of Changes (Yijing) elucidating the principles of Qian-Kan-Li (the harmonious interaction of yin-yang), to the Dao De Jing teaching clarity and non-action (Wuwei), through classics like the Scripture of Hidden Correspondences (Yinfu Jing) and the Seal of the Unity of the Three (Cantong Qi)—though expressed differently—all ultimately explore the origin of human nature and life-force, establishing the fundamental laws of Golden Elixir cultivation. In essence, the alchemical method involves nurturing the "medicine" (primordial Qi) in the Kun furnace (lower Dantian) and crystallizing the Golden Elixir in the Qian crucible (upper Dantian). Beginning with Kan-Li (the harmonization of water and fire), the practitioner ultimately returns to the primordial single Qi.

This passage elucidates the core principles of Daoist Neidan (internal alchemy) practice. During cultivation, when Jing (essence) and Qi (vital energy) unite in the Kun Palace (lower Dantian) to produce the "great medicine" (raw material for internal elixir), this represents the function of the Kun position (Yin). The timely gathering of this medicinal substance, elevating it to the "Celestial Valley" (crown of the head) and returning it to the "Yellow Court" (middle Dantian), belongs to the Qian position's (Yang) function.

Regarding the "returned elixir" (critical stage in Neidan practice), the gentle fire tempering after gathering the medicine into the furnace pertains to the Kun Palace. Conversely, concentrating the fire to carry the metal (alchemical metaphor) and performing the copulation exercise at the summit of Kunlun (crown of the head) again belongs to the Qian position. Master Cui Xifan's saying "produced in Kun, planted in Qian" precisely conveys this meaning. The ancestral masters revealed these truths so clearly that it practically amounts to disclosing celestial secrets.

Regrettably, most people remain deluded by heterodox methods: some mistake dual cultivation through sexual practices as Qian-Kun union—this plants causes for hell realms; others consider the areas below the navel and above the head as Qian-Kun positions—this amounts to ghostly activities in dark caverns, demonstrating profound ignorance. Should someone of exceptional wisdom sincerely investigate, and should divine illumination suddenly dawn upon them, they would instantly realize: the entire universe is the alchemical cauldron, all living beings are medicinal ingredients, and every movement in daily life represents firing times. The Three Pure Ones (Sanqing) and Supreme Venerable Sovereign (Taishang) are none other than our original Dharmakaya—enlightenment and ancestral mastery become immediately attainable.

The Three Pure Ones refer to the Jade Pure, Upper Pure, and Supreme Pure—the three supreme perfected beings. "Supreme Venerable" denotes the primordial true sovereign beyond comparison. Ordinary people tremble upon hearing these names, imagining them as distant celestial rulers unrelated to themselves. In truth, our original Jing is the Jade Pure Perfected Being (equivalent to Buddhism's pure Dharmakaya), our original Qi is the Upper Pure Perfected Being (countless transformation bodies), and our original Shen is the Supreme Pure Perfected Being (perfect reward body). These three are fundamentally one—called the Three Pure Ones; united, they become the Supreme Venerable. This transcends numerical concepts of three or one, representing the supreme truth beyond quantification.

The ancestral masters' reference to "awakening to truth" points precisely to this realization. All previously mentioned Golden Elixir (Jindan) terminology—cauldrons, medicinal ingredients, etc.—serves as skillful means pointing toward this ultimate truth.

When the huohou (firing process—the grasp of timing in Neidan (internal alchemy) cultivation) reaches this realm, it has already transcended the level of methods and techniques, to say nothing of heterodox side paths and lesser-vehicle practices. Alas! If not for true masters of the Dao (the Way) among the Three Teachings of Confucianism, Buddhism, and Daoism, who could truly understand its mystery?

This classic has already summarized all the core essentials of the great Dao of the Golden Elixir; what follows is merely an unfolding and explanation of those essentials. The whole book is clearly organized and advances layer by layer, and only at the very end does it truly reveal the heavenly secrets. Both the author Zhang Boduan and the commentator Zhu Yuanyu understood this thoroughly—I wonder whether readers will also be able to grasp it.

(This is an overall evaluation of the upper volume.)

Next is the middle volume of the Wuzhen pian (Awakening to Reality), authored by the Perfected Ziyang, Zhang Boduan, and explicated by the Daoist Yunyang, Zhu Yuanyu. This part uses sixty-four seven-character quatrains to symbolize the number of the sixty-four hexagrams.

The first poem speaks of the order of cosmic generation: from emptiness the Great Dao produces the prenatal One Qi (yuanqi, original Qi); this one Qi then differentiates into the two Qi of Yin-Yang; the two Qi of Yin-Yang combine to produce the Three Powers (Sancai) of Heaven, Earth, and Humanity; and the interaction of the Three Powers brings forth the flourishing of the myriad things.

This chapter discusses the cosmological generation process described in the Daodejing: “The Dao produces one; one produces two; two produces three; three produces the myriad things.” These few lines contain the mysteries of Heaven, Earth, and the myriad things and encompass the essence of the Three Teachings of Confucianism, Buddhism, and Daoism; unfortunately, few truly understand them.

The Great Dao originally has no fixed form; it is an undifferentiated whole like the realm of the Great Void and cannot be described in words. Only provisionally can it be called “emptiness,” “naturalness,” or “Qi not yet manifest” (Qi that has not yet appeared). Yet as soon as it is called “empty,” it already contains “substantial”; as soon as it is called “nothing,” it already contains “being”; as soon as it is called “natural,” it already contains causes and conditions; as soon as it is called “Qi not yet manifest,” the original Qi has already arisen. This is “the Dao produces one,” what Zhou Dunyi called “Wuji (Non-Ultimate) and then Taiji (Supreme Ultimate).”

After the one Qi differentiates, there arises the distinction between clear and turbid, movement and stillness: the clear and light rises to become Heaven; the turbid and heavy sinks to become Earth—this is “one produces two,” what Zhou Dunyi called “Yin and Yang are divided, and the Two Modes (Liangyi) are established.” Thereafter, Heavenly Qi descends and Earthly Qi rises; the two Qi interact and produce human beings—this is “two produces three,” what Zhou Dunyi called “the Qian Dao forms the male, the Kun Dao forms the female.” This Qi of the One Origin fills the universe; the Three Powers of Heaven, Earth, and Humanity are complete, and the myriad things each attain their place. Whether sentient beings or insentient objects, all rest in their proper positions—this is “three produces the myriad things,” what Zhou Dunyi called “the myriad things generate and regenerate, and their transformations are infinite.”

This passage elucidates the practitioner's need to understand the principle of returning to the origin. Through expounding the essence of the Daode Jing, the Patriarch points out that all things evolve from the fundamental source of Dao. As the most spiritually endowed among all beings, humans should particularly seek to return to their original source.

The text explains that while the myriad phenomena of the world appear complex and diverse, they ultimately must return to their root. Returning to this root allows one to recover their innate nature (fuming) and attain the state of enduring vision and longevity. Regrettably, most people fail to comprehend this eternal, unchanging truth, constantly engaging in reckless actions that bring about misfortune. In reality, the Great Dao manifests in ordinary daily activities - simply by severing deluded thoughts when the six senses (eyes, ears, nose, tongue, body, and mind) encounter external phenomena, one can liberate all six sensory faculties.

The cultivation method is actually quite simple: returning to one's original mind. Yet worldly people often overlook this ordinary principle, always chasing novelty and seeking externally, thereby straying onto wrong paths. As the Yinfu Jing states, life and death mutually transform - understanding this principle allows one to turn mechanisms of destruction into vitality. The key lies in perceiving what appears as a dead end as actually the path of life, avoiding attachment to superficial signs of vitality that may conceal traps. Comprehending this transformative pivot reveals how seemingly harmful phenomena actually contain seeds of vitality.

Originating from the Daode Jing, this passage emphasizes the cultivation method of returning to the origin, stressing the importance of realizing the Great Dao in daily life without being misled by superficial appearances.

The root of life and death lies in the mind's thoughts, yet the survival of these thoughts is influenced by external phenomena. Every grasping thought arising from the six senses (eyes, ears, nose, tongue, body, and mind) encountering the external world becomes a gateway to the cycle of birth and death. Why is this so? Ordinary people habitually regard sensory pleasures as the foundation of existence, calling them the "gate of life" (shengmen) and considering them blessings. Yet these very attachments become the "gate of death" (simen) that obscures one's original nature, harboring hidden calamities. Indulging desires transforms what was originally a gate of life into a path of death, where supposed blessings breed misfortune. Conversely, through reverse cultivation (nixing), the gate of death can become a passage to life, with calamity itself concealing vital potential.

Fortune and misfortune are as inseparable as shadow follows form or echo answers sound. Daoist practitioners perceive this dynamic differently: aligning with the Dao's principles to return to one's authentic nature is to invite blessings, while defying these principles through reckless action invites disaster. The key lies in the mind's capacity for instantaneous transformation—when deluded thoughts shift to right awareness, misfortune may become fortune, and inauspicious signs can turn auspicious. This shift, seemingly as simple as turning one's palm, fundamentally reorients one's entire being from attachment to awakening.

This passage synthesizes the Yinfu Jing's theory of "the pivot of life and destruction" (shengsha zhi ji) with the Daode Jing's teaching on the interdependence of fortune and misfortune. Here, "destructive pivot" (shaji) does not imply literal killing but rather the decisive power to sever attachments: dismantling obsession with sensory gratification (shaji) paradoxically activates the vitality (shengji) of one's authentic life. This transformative mechanism lies at the heart of a cultivator's transcendence beyond the cycles of birth and death.

To ensure the Valley Spirit (referring to the primordial Shen/spirit) remains eternally undying, one must establish the foundation of cultivation through the Mysterious Feminine (the root of Yin and Yang energies). When the True Jing (primordial Qi/energy) returns to the Golden Chamber (Dantian), it is like a luminous pearl that never departs.

This chapter discusses the unification of Yin and Yang energies into one—the foundational practice for refining the Golden Elixir (Jindan). The Daode Jing states, "The Valley Spirit never dies; it is called the Mysterious Feminine." The Valley Spirit is one's original true nature. "Valley" represents the ultimate emptiness, while "Spirit" signifies the ultimate awareness—this state of perfect emptiness and luminosity exists in the present moment. In stillness, it remains unmoving; in activity, it responds to all things. Without beginning or end, the Valley Spirit is inherently deathless and thus endlessly generative. All phenomena of heaven and earth arise from it—this is the natural progression of creation described as "the Dao gives birth to the One, the One gives birth to the Two."

To reverse this creative process and return to its origin, one must establish the foundation through the Mysterious Feminine. The True Yang energy within the Kan trigram is called "Mysterious" (Xuan), representing the presence-within-absence—the root of life (Ming) residing in the body. The True Yin energy within the Li trigram is called "Feminine" (Pin), representing the absence-within-presence—the root of nature (Xing) residing in the heart. When these two unite, the foundation for the Golden Elixir is established, and the Valley Spirit naturally endures. Hence the verse: "To make the Valley Spirit deathless forever, rely on the Mysterious Feminine to set the root."

When the Mysterious and Feminine energies converge in the Middle Dantian (Central Yellow), the primordial Jing coalesces in wondrous harmony. Like the legendary Mysterious Pearl of Crimson Waters (a metaphor for the Golden Elixir), it manifests spontaneously—once attained, it is never lost. Thus, "When True Jing returns to the Golden Chamber, a luminous pearl never parts." With the return of True Jing and the establishment of the Mysterious Feminine foundation, the Mysterious Pearl (Golden Elixir) takes form—is this not the very manifestation of the Valley Spirit's immortality? This is the foundational practice of unifying Yin and Yang, the wondrous function of transforming the energy of destruction into the energy of life.

Few in the world truly comprehend the profundity of the Mysterious Feminine Gate. Do not mistakenly equate it with the breathing techniques of mouth and nose. Even if one practices such exhalation and inhalation for a thousand years, how could it ever unite the Golden Crow (the sun, symbolizing Yang essence) and the Jade Rabbit (the moon, symbolizing Yin essence)?

This chapter further clarifies that the wondrous function of the Mysterious Feminine cannot be grasped by heterodox methods. Though the Mysterious Feminine and the Valley Spirit share the same essence, their functions differ—one represents presence, the other absence; one symbolizes the sun, the other the moon. Their opening and closing, movement and stillness, can reverse the very order of heaven and earth. This is what Laozi meant by "The gate of the Mysterious Feminine is the root of heaven and earth." Heterodox practitioners fail to grasp this mystery, erroneously interpreting "continuous, as if ever-present" as mere breathwork—a grave misunderstanding indeed.

This passage elucidates the cultivation of the Golden Elixir (Jindan, the core concept of Daoist internal alchemy referring to the refined energy essence formed within the body), which hinges on mastering the dynamic interplay between "Xuan" and "Pin"—the fundamental Yin-Yang relationship. Xuan (representing Yang, active, and dominant) and Pin (representing Yin, passive, and receptive) are likened to the Golden Crow in the sun (symbolizing true Yin) and the Jade Rabbit in the moon (symbolizing true Yang). When these two forces harmonize and their roles subtly reverse, they naturally constrain and unite to form the Golden Elixir.

The Scripture of the Hidden Talisman (Yinfu Jing) states, "The control of the bird lies in Qi," referring precisely to this mutual constraint of Yin and Yang energies. If one relies solely on superficial techniques like breathing exercises, even after millennia of practice, true Yin and Yang will remain separate. How could one ever attain the wondrous state where "the Golden Crow catches the Jade Rabbit" (the union of Yin and Yang)? This is why the "gate of Xuan and Pin" (the crucial point of Yin-Yang interaction) is seldom truly understood.

Laozi’s Classic of the Way and Virtue (Daode Jing) declares, "These two emerge together but differ in name," pointing to this very relationship between Xuan and Pin. "Constant Non-Being" (Xuan, Yang, dominant) corresponds to one’s true nature, while "Constant Being" (Pin, Yin, receptive) corresponds to one’s true life force. Though they manifest differently, they are fundamentally one. Practitioners must move from "Being" into "Non-Being," returning to the primordial state—this is the most profound secret of cultivation.

In practice, one must balance two approaches: the "method of action" (active cultivation) preserves life and requires steady accumulation, while the "method of non-action" (stillness and contemplation) awakens one’s nature and demands the gradual shedding of desires. By diminishing desires until complete non-action is achieved, the practitioner naturally attains the transcendent state where form and spirit (Xing and Shen) are both perfected. When water (Yin) and fire (Yang) merge into a purple radiance, it signals the completion of the Golden Elixir—this is the dual cultivation of nature and life (Xingming Shuangxiu), the most efficacious and sublime path.

Finally, the text critiques those who misunderstand the proper hierarchy of Yin and Yang, mistakenly focusing solely on sexual cultivation techniques (Daoist bedroom arts) and squandering their vitality. Isolated cultivation of one aspect is not the true path; one must grasp the principle of Yin and Yang complementing each other.

This passage elucidates the principle that cultivating the Golden Elixir (Jindan), the core concept of Daoist Neidan (internal alchemy) practice, requires simultaneous cultivation of nature (xing, the mind-heart) and life (ming, bodily energy). The text explains that in the prenatal state, nature and life correspond to Qian (pure Yang) and Kun (pure Yin) from the Yijing (Book of Changes), while in the postnatal state they correspond to Kan (water) and Li (fire) - the hexagrams representing the interaction of water and fire. These relationships are subtle yet hierarchical, requiring careful discernment by practitioners.

Many contemporary practitioners mistakenly identify only the Li hexagram (symbolizing fire and heart) as representing "nature," unaware that the Yin qi within Li actually corresponds to postnatal acquired consciousness (distracted mind) that fluctuates with external circumstances. Some erroneously take this transient aspect as their true nature - akin to mistaking a thief for one's son, elevating the secondary to primary status. Similarly, many recognize only the Kan hexagram (symbolizing water and kidneys) as representing "life," yet fail to understand that the Yang qi within Kan embodies the prenatal Qian nature (pure Yang essence), which is eternal. Those lacking proper guidance may dismiss this vital aspect as external, like a poor man searching for clothes while unaware of the pearl concealed within - thus demoting the essential to the incidental. Such subtle misunderstandings lead to vastly different outcomes.

Numerous Daoist practitioners today, upon hearing about quietistic cultivation, immediately retreat behind closed doors to meditate in isolation. This resembles sealing the coccyx (a crucial energy hub) to cultivate only one aspect, resulting in a state of isolated Yin. This stems from failing to distinguish primary from secondary aspects and comprehend the profound Dao, leaving practitioners clinging to superficialities rather than true essence. How many have been misled by such errors!

This recalls the story of Master Mazu, the Tang Dynasty Chan master who sat rigidly in meditation at Nanyue Mountain. The venerable Huairang awakened him first with the analogy "polishing a tile won't make a mirror," then with the koan "should you whip the ox or the cart?" Only then did Mazu experience sudden enlightenment. Understanding this classic Chan anecdote reveals the crux of this chapter.

The text then outlines practical cultivation stages: First observe the Dao's celestial movements to comprehend the mysteries of mutual generation and restraint among the Five Phases (Wood, Fire, Earth, Metal, Water). Next stabilize body and mind as one would pacify a nation by settling its people. Only when body-mind is tranquil and energy abundant can true cultivation commence, ultimately revealing the inner "sage" (referring to one's original spirit or true self).

This chapter teaches the art of returning to prenatal original destiny - the essential method of Golden Elixir cultivation. Partial cultivation is not the Great Dao. So what truly constitutes the Golden Elixir path? Practitioners must thoroughly comprehend Yin-Yang transformations and master creation's profound mechanisms. The Yinfujing (Scripture of Hidden Correspondences) states: observe celestial patterns to align with the Dao's operations; it further declares that Heaven's Five Phases possess restraining power - only those who understand this will flourish. The Five Phases govern both cosmic creation and self-cultivation. Without grasping their generative and destructive interactions, how could one possibly refine the Golden Elixir? Therefore, aligning with celestial patterns precedes all cultivation.

The practice of Neidan (internal alchemy, the Daoist method of cultivating one's Jing, Qi, and Shen) must begin with serene introspection—only by truly perceiving the internal transformations can one commence. The creative transformations of life energy within the human body reside in the square-inch space of the heart region, an area that simultaneously governs the two energies of Kan (kidney water) and Li (heart fire).

When the practitioner becomes clearly aware of these internal changes, the Yuanshen (primordial spirit, the innate consciousness) will establish its dominant position. Once the Yuanshen takes command, the six senses—eyes, ears, nose, tongue, body, and mind—return to their original state, obeying the "Celestial Ruler" (i.e., the Yuanshen), much like a nation's people living in peace and prosperity. When the Three Treasures (Jing, Qi, and Shen) are gathered inward without dissipation, external disturbances cannot invade, just as a strong and prosperous nation remains unassailable.

At this stage, the Kan-water and Li-fire can interact and merge, initiating the formation of the Golden Elixir (the condensation of internal alchemy). This process manifests as the fierce struggle between the Dragon (symbolizing Yang energy) and the Tiger (symbolizing Yin energy). When water and fire unite, the six sensory roots remain undisturbed, the acquired consciousness ceases its activity, and the "Five Thieves" (the desires of the five senses) are subdued. Yin energy is thoroughly swept away, revealing the image of victory—only then can the original true nature emerge, forming the "Sacred Embryo" (the nascent stage of the Golden Elixir) and revealing the inner "Sage" (the true essence of the Yuanshen). By returning to the innate nature and life force, aligning with the virtue of Heaven and Earth, one attains the Great Dao.

Now, let us discuss the key considerations during practice: The application of internal energy must distinguish between left and right, primary and secondary. The left side belongs to Yang, yet the Li-fire (heart fire), though positioned on the left, is actually the Yin within Yang and should retreat to a secondary role. The right side belongs to Yin, yet the Kan-water (kidney water), though positioned on the right, is the Yang within Yin and should take the lead. This is the meaning behind the saying, "In employing the generals, one must distinguish between the left and right armies."

The cultivation of the elixir primarily focuses on revealing the true nature. Though the radiance of Li-fire is important, it still harbors the acquired discriminating mind and cannot be considered true insight into nature. The innate true nature resides within the primordial Qi of Kan-water, and because it has not yet fully manifested, it is referred to as the "other." It is essential to let this "other" take the lead while one steps back—this reversal of host and guest is the profound mystery of cultivation.

The specific steps are as follows: First, use the true Yin (the heart-mind) within Li-fire to introspect and reflect inward, then draw out the true Yang (primordial Qi) from Kan-water, allowing the discriminating mind to completely recede so the true nature can emerge. Just as in warfare, one must first capture the leader—once the "true seed" (primordial Qi) is obtained, Yin disturbances naturally disperse. However, the entire process must be carefully managed with proper "fire timing" (the rhythm of practice), as if facing a formidable enemy—recklessness is not permissible. If distracting thoughts arise during practice, one risks losing the true Yang within Kan, destroying the precious fruits of cultivation.

In our Daoist tradition, there exists a priceless treasure that must be treated with utmost care. This chapter should be studied alongside the previous two to fully grasp the subtle transformation between host and guest relationships. Certain inferior heterodox paths have distorted terms like "underestimating the enemy" and "achieving victory" mentioned here into perverse theories of yin-stealing and yang-supplementation, deceiving people and causing them to lose both their lives and the Dao. Such individuals face heavenly thunderbolts in life and endless hell realms after death.

The interdependence of heaven, earth, and humanity—the Three Powers—hinges on seizing the right timing, which contains the profound mystery of attaining immortality through virtue (De). When all things occupy their proper positions, distracting thoughts naturally subside. With the body's hundred bones properly regulated, one realizes the state of wuwei (non-action). This chapter explains the restorative practice of progressing from conscious cultivation to ultimately achieving wuwei.

The opening derives from the Dao De Jing principle: "The Dao begets One, One begets Two, Two begets Three"—thus completing the Dao of the Three Powers. Following this sequence makes ordinary people; reversing it through cultivation makes sages. For practitioners who grasp the mysteries of creation, transcending the mundane to become sacred is no difficult task. The Yin Fu Jing states: "When the three thefts are properly aligned, the Three Powers find stability," and further explains: "Seizing the right timing regulates the hundred bones; activating the profound mechanism brings peace to all things." The secret of refining the Golden Elixir lies in: using heaven as the cauldron, earth as the furnace, the essence of sun and moon as medicinal ingredients, with the practitioner operating the celestial cycles and fire phases within—this is the inverted application of the Three Powers in alchemical practice.

The actual cultivation divides into two methods:

For the Lesser Celestial Cycle, one first extracts yang energy from kidney water (the yang within Kan) to supplement yin essence in heart fire (the yin within Li), causing water and fire to intermingle in the central palace where the Golden Elixir forms in the furnace. The crucial point is awaiting the appearance of "living midnight" (huo zishi), the proper time for gathering the medicinal substance.

The Greater Celestial Cycle requires positioning Kun (Earth) above and Qian (Heaven) below—reversing heaven and earth's positions—so yin and yang unite at the crown (Kunlun), with the Golden Elixir returning to the cauldron. This demands waiting for "true midnight" (zheng zishi) to arrive as the standard for refinement.

Only when these two methods coordinate internally and externally can one fully harmonize the Three Powers of heaven, earth, and humanity to ultimately succeed in forming the elixir. Essentially, both use true intention to regulate body and mind, allowing primordial essence (jing) and vital energy (qi) to beautifully unite, while the primordial spirit (shen) naturally endures. People recognize this as an immortal's secret method, yet fail to understand it's actually the spontaneous mystery within the process of cultivating virtue and realizing the Dao—the essential technique of returning to the root and restoring life. After refinement, body and mind become completely tranquil, the primordial spirit sits firmly in the center, utterly still yet naturally circulating qi and blood throughout the entire being.

The crux of cultivation lies in gathering all energies at the central position of the Middle Yellow (the Dantian region at the body's core), just as the North Star remains steadfast in the celestial vault while all other stars naturally revolve around it. It resembles sunlight returning to a frigid valley, instantly restoring spring warmth to the earth. This represents the state where all things return to their proper places, maintaining the harmony of heaven and earth. When all transformations settle into stillness, when distracting thoughts completely cease, and when the body's meridians become unobstructed, one may realize the state of Wuwei (non-action). This chapter discusses the unification of Jing (essence), Qi (vital energy), and Shen (spirit), transitioning from active cultivation to the realm of non-action—precisely echoing the opening chapter and demonstrating how the cultivation methods in the Yinfu Jing align with the natural Dao of the Daode Jing: returning to the original state through concrete practice, thereby completing both life cultivation (minggong) and perfecting nature cultivation (xinggong).

Though the Yinfu Jing contains merely three hundred characters and the Daode Jing only five thousand, countless realized immortals throughout history have comprehended the ultimate truth through these two classics. This chapter illuminates their core teachings, revealing the fundamental origin of the Great Dao. The Great Dao cannot be understood without guidance from a master, nor confirmed without verification through scriptures. These classics serve as the transmitted wisdom of sages across generations. Although the Daoist canon contains thousands of volumes, only the Yinfu Jing and Daode Jing are revered as foundational patriarchs, for their teachings on the unity of heaven and humanity represent the ultimate principles of investigating cosmic patterns, penetrating innate nature, and awakening to life's true meaning.

The two scriptures appear simultaneously similar yet distinct, seemingly different yet not contradictory: The Daode Jing directly points to the natural original state—its Dao generates all existence from emptiness through a forward-moving mechanism, while the Yinfu Jing specifically expounds the function of returning to the root and restoring life—its Dao returns from active states to non-action through a reverse-moving mechanism. Consider how "the empty oneness of Qi" represents forward movement, while immediately afterward "knowing constancy to return to the origin" indicates reverse movement; how "shared source with different names" shows forward movement, while "observing earth to settle people" shifts back to reverse movement. As for the "Valley Spirit" (the mystery of the Dantian's primordial Shen), one must first establish the "Mysterious Feminine" (the foundation of Yin-Yang interaction)—this demonstrates reverse movement within forward. The "mechanism of mutual appropriation" (the law by which heaven, earth and all beings draw energy from each other) ultimately realizes non-action—showing forward movement within reverse. This perfectly manifests the profound mystery of how the Daode Jing and Yinfu Jing mutually generate being and non-being while sharing the same source of nature and life.

Though both texts are exceptionally concise and abstruse, all who attained immortality through the ages derived immense benefit from them. No subsequent cultivation theory has ever transcended their framework—they truly are peerless treasures for investigating celestial principles, penetrating fundamental nature, and awakening to life's truth. The authentic oral instructions and profound subtleties cannot be fully conveyed through writing; one must engage in face-to-face discussion with an enlightened master to grasp the precise timing and分寸 (measure) within these delicate cultivation processes.

This chapter explains that the secrets of fire regulation (a key technique in Neidan/internal alchemy for controlling intention and breath) must be transmitted personally by a master. Although the Yinfu Jing and Daode Jing point all Daoist practitioners toward the fundamental path, these classics primarily elucidate the core principles of returning to one's origin and recovering true nature, without delving into the specialized terminology of alchemical cultivation.

It wasn't until the Eastern Han dynasty, when the Daoist adept Wei Boyang (patriarch of the alchemical tradition) composed the Zhouyi Cantong Qi based on Yijing principles, that systematic terminology emerged—including the crucible and furnace (metaphors for the body's cultivation centers), medicinal ingredients (representing Jing, Qi, and Shen), and fire regulation. Using Qian and Kun to symbolize the crucible and furnace, Kan and Li to represent the medicinal substances, and the remaining sixty hexagrams to correspond with the cyclical patterns of fire regulation, this profound and cryptic work became honored as the progenitor of alchemical scriptures. Subsequent alchemical texts proliferated—some expository, others in verse—all essentially employing metaphors to illuminate the fundamental principles of cultivation.

Though these classics meticulously document hexagram transformations, medicinal measurements, and temporal calculations, these remain superficial aspects of fire regulation. The core oral instructions, though implied, are never explicitly stated. Their mysteries require a true master's personal transmission—where a few words can unlock celestial secrets, transforming written characters into living wisdom. As the adept Ziqing (Bai Yuchan) observed: Half a line of genuine instruction can illuminate ten thousand volumes of alchemical texts. Without this, it's like having one's eyes veiled—any understanding remains as insubstantial as flowers reflected in a mirror or the moon's reflection in water, leaving no practical foothold.

As the verse says:

Even with Yan Hui or Min Ziqian's brilliance (two of Confucius' most perceptive disciples),

Without a master's transmission, don't force comprehension.

For alchemical texts lack the heart-to-heart keys—

How then to forge the golden embryo within?

This chapter emphasizes that the Great Dao of the Golden Elixir requires master-disciple transmission. Some might object: Aren't there exceptionally gifted individuals who need no teacher? Yet while one's innate nature may be self-realized, the life-cultivation techniques (concrete practices) demand transmission. History records no instance of anyone attaining the dual cultivation of nature and life (Xingming Shuangxiu) without guidance. Thus the Yellow Emperor journeyed to Kongtong Mountain to learn from Guang Chengzi, and Confucius sought Laozi's counsel (then archivist of Zhou). Were these sages not far wiser than Yan Hui or Min Ziqian? Their diligent pursuit of teachers proves the Dao's profundity defies conjecture. Like the Yinfu Jing and Daode Jing's teachings about observing heaven-earth patterns and returning to the source—these truths seem near at hand, yet without a genuine master's guidance, they remain as elusive as moonbeams on water or blossoms in a mirror, leaving practitioners without means to proceed.

Later alchemical texts (Daoist Neidan cultivation scriptures) often describe the "medicinal ingredients" (the essential Jing, Qi, and Shen required for practice) and "firing times" (the timing and methods of cultivation) through elaborate metaphors and coded language. These arcane terms and concepts leave readers utterly bewildered. If mere comprehension proves so difficult, how much more challenging must be the actual practice leading to the formation of the Sacred Embryo (the highest achievement in internal alchemy)? Therefore, earnest seekers of the Dao should urgently seek authentic masters to obtain genuine oral instructions, rather than waste precious time.

But are these alchemical texts truly useless? In truth, the genuine oral transmissions are hidden within these very scriptures, much like the dragons painted by Zhang Sengyou - mere wall decorations until their eyes were dotted, whereupon they broke free and soared away. This "eye-dotting" mystery fundamentally depends on the guidance of a true master.

Consider the account of visiting the Western Paradise in a dream, where the Celestial Beings of the Nine Heavens transmitted the "Pointing to the Mysteries" text with remarkable simplicity: the core of cultivation lies in refining Mercury and Lead (Neidan terminology symbolizing Yin and Yang energies). The master's crucial oral instruction centers precisely on these two substances.

Mercury (symbolizing the Original Spirit) is inherently formless, representing "the true emptiness within wondrous existence"; Lead (symbolizing Original Essence) possesses tangible substance, representing "wondrous existence within true emptiness." "True emptiness within wondrous existence" corresponds to the primordial ancestral nature (pure Yang symbolized by the Qian hexagram), while "wondrous existence within true emptiness" corresponds to the primordial destiny (pure Yin symbolized by the Kun hexagram). In postnatal cultivation, nature resides in the heart, causing the Qian hexagram to transform into Li (☲), with its central broken line representing true Mercury; destiny resides in the body, causing the Kun hexagram to fill and become Kan (☵), with its central unbroken line representing true Lead.

The practitioner must extract the Yang from Kan (true Lead) to transform the Yin within Li (true Mercury), thereby restoring the primordial Qian state of pure Yang. This process of refining postnatal Yin and Yang substances achieves the Golden Elixir. When these two substances merge into one, becoming primordial unified Qi (the most fundamental energy), it is then called true Lead - though already unified, this constitutes the "outer medicine" (the preliminary elixir). Through further refinement, a spark of spiritual light descends to the Yellow Court (Dantian region), condensing into the Sacred Embryo - this constitutes the "inner medicine" (the advanced elixir). The process continues with "extracting Lead and adding Mercury" (balancing Yin and Yang) through repeated refinement, ultimately returning to the realm of emptiness - this constitutes true Mercury. Only when "Lead is exhausted and Mercury dried" (perfect Yin-Yang harmony) can one transcend ordinary existence.

Simply put: true Lead symbolizes the body, true Mercury symbolizes the heart-mind. Refining true Lead accomplishes the cultivation of life (physical practice), while refining true Mercury accomplishes the cultivation of nature (spiritual practice). When both nature and life cultivation reach completion, the Great Dao is fulfilled. Is this not the most concise and essential truth?

Our lineage's patriarch, Purple Yang Zhenren (Zhang Boduan), encountered Ancestor Haichan (Liu Haichan) at Mount Qingcheng in Chengdu, Sichuan, where he received the Golden Elixir secrets. Later, after suffering celestial punishment for mistakenly transmitting the alchemical method, he retired into seclusion to compose texts and transmit the Dao.

This passage reveals the core mystery of cultivating the Golden Elixir (Jindan) - the wondrous application of "true lead." While previous chapters emphasized the equal importance of lead and mercury (alchemical terms symbolizing yin and yang qi), here we focus specifically on true lead to illuminate the essential ingredient of the supreme elixir.

True lead refers to the primordial qi (the cosmic source energy) arising from emptiness, whereas ordinary lead denotes postnatal essence and qi. Specifically within the human body: the yang qi in the kidney (Kan) and the yin essence in the heart (Li) both belong to ordinary lead. Only when these two unite to produce the "true seed" (embryo of the Golden Elixir) does it become true lead. This true lead is the very substance of the Golden Elixir - the primordial qi emerging from emptiness.

After practitioners recognize this true seed, they refine it through the processes of gathering and tempering to form the "golden liquid returned elixir." Through further cultivation involving gentle nurturing and "breastfeeding" (tender care like nourishing an infant), postnatal impurities are gradually eliminated. Ultimately, one achieves the perfected state of the primordial dharma body (pure yang form), radiant and united with emptiness. At this stage, even true lead becomes unnecessary, let alone ordinary lead.

Here we encounter a seemingly paradoxical yet profoundly subtle principle: initial cultivation requires true lead, yet ultimately transcends it. As the ancient verse states: "Using lead without using lead" - appearing to employ it while not, seeming to reject it yet applying it. This mystical principle of inverted application constitutes the essential method transmitted by the Immortal Xihua (a Daoist deity).

The subsequent analogy - "bamboo repairs require bamboo, hatching eggs needs hen's eggs" - illustrates that cultivation must employ the corresponding true lead as the "true seed," other methods being futile. Though true lead as the foundation of the returned elixir is fundamentally primordial qi, its efficacy manifests only through concrete cultivation. Like farming requiring seeds that don't equal harvest without cultivation, this embodies the profound mystery of the Golden Elixir path.

The cultivation of the Golden Elixir (Jindan, the core objective of Daoist Neidan practice) must rely on corresponding postnatal substances to initiate the process. This is because postnatal matter cannot transform without the participation of primordial Qi (Xiantian zhi qi), while primordial Qi cannot condense without the vessel of postnatal substance. Consider the supreme yin essence within the Li trigram (symbolizing fire) and the supreme yang qi within the Kan trigram (symbolizing water) - though belonging to the postnatal realm, they precisely constitute the source of true lead (Zhenqian, an alchemical term referring to the material basis of primordial qi). When these two unite, true lead spontaneously manifests. This process of condensation occurs as naturally as grafting bamboo with bamboo or hatching a chicken from an egg - seemingly arising from nothing yet actually returning to the origin.

Postnatal form must undergo the transformative touch of true lead to transcend mundanity and enter sagehood. Beyond these two crucial elements of Kan and Li (water and fire), no other substances qualify as true counterparts - how then could they condense true lead and align with the Dao? Thus the scripture states: "Before refining the returned elixir, don't seek hermitage - mountains before and behind contain no lead." Before achieving the Golden Elixir, one shouldn't hastily retreat to mountain seclusion, for true lead cannot be found in such places. This supreme treasure actually exists in every household, yet ordinary people universally fail to recognize it.

Here we elucidate the operational principle of true lead - one cannot pursue silent cultivation unilaterally. Only through the convergence of Kan and Li substances does true lead form, and this true lead constitutes the embryonic form of the Golden Elixir. After obtaining true lead, further refinement through gathering and smelting produces the golden fluid returned elixir (Jinye Huandan, an advanced Neidan achievement). Following the elixir's completion, nine years of wall-facing practice (Jiunian Mianbi, prolonged meditation retreat) are required until not a single dust-mote stains the heart and all phenomena become empty - only then does one fulfill the true meaning of reclusive cultivation. If one seeks seclusion before completing the returned elixir, severing external connections, from where would the materials for refining external medicine (Waiyao, the essential substances for cultivation) originate?

Though the essence of true lead exists within everyone, recognizing it without guidance from an enlightened teacher proves extremely difficult. It is neither common mineral medicines, nor heterodox practices, nor simple bodily essences. Abandoning these key elements to focus solely on closed-door meditation leads to one-sided cultivation - like entering deep mountains searching for lead ore, such effort proves futile. How lamentable that this universal treasure goes unrecognized due to lack of proper instruction, hence "this supreme treasure exists in every home, yet people of this age comprehend it incompletely."

This chapter emphasizes that recovering original nature cannot rely solely on silent cultivation. The method of reclusion proves equally particular - it must be understood in conjunction with the practice of "dwelling in the dusty world while closing the tail gate" (Juchenshi Bi Weilü, cultivating the lower Dantian while living in society). The profound meaning behind "emptying the heart and filling the belly" (Xuxin Shifu) suggests that rather than obsessing over the state of "empty heart," one should first refine lead to replenish the Dantian. Maintaining stability in the lower foundation remains paramount.

This scripture explains the two essential stages of Neidan (internal alchemy) practice: cultivating the mind (realizing one's nature) and cultivating the body (perfecting one's life). The two phrases from the Dao De Jing — "empty the mind, fill the belly" — contain profound cultivation wisdom.

"Filling the belly" refers to using active methods (youwei) to strengthen the physical foundation of life, while "emptying the mind" employs non-action (wuwei) to refine the heart-mind and return to one's original purity. The innate human mind is originally as clear and open as empty space, capable of embracing all things without attachment. Those of superior spiritual capacity may begin directly with mind cultivation, attaining enlightenment before refining the body. However, ordinary practitioners often find this difficult and must start with "refining lead" (cultivating Jing and Qi). Only after stabilizing the physical foundation can they gradually turn to mind cultivation.

Yet refining lead is no simple task. Ordinary people have scattered thoughts and desires that constantly drain their vital essence, like a house full of gold and silver they cannot protect. To preserve this essence, one must withdraw the senses and sever external distractions to attract the "Primordial Qi" (the most fundamental life energy). Only when the six senses are purified and one returns to this primordial state can "true lead" be obtained. Once true lead is stabilized, continuous practice transitions from active methods to non-action, ultimately reaching the state of perfect clarity in mind and nature.

The text then reveals the profound mystery of inverting Kan (Water) and Li (Fire), two trigrams from the Bagua (Eight Trigrams). Li symbolizes the sun and fire, corresponding to Qian (Heaven, pure Yang), yet in the postnatal state it represents femininity. Kan symbolizes the moon and water, corresponding to Kun (Earth, pure Yin), yet in the postnatal state it represents masculinity. This inverted Yin-Yang relationship is precisely the key to generating true lead. The most crucial aspect of refining the Golden Elixir lies in grasping these subtle transformations between Kan and Li—never judging by surface appearances alone.

This passage elucidates the profound mysteries of Yin-Yang and Five Phases transformation in Daoist Neidan (internal alchemy) practice. It begins by describing how primordial Qi converts into postnatal Jing (essence) and Qi (vital energy) through a process likened to the inversion of Yin-Yang. If this inversion can be reversed—returning the Yin line from the Li trigram (symbolizing fire) to Kun (symbolizing earth), and the Yang line from the Kan trigram (symbolizing water) to Qian (symbolizing heaven)—all things will return to their proper places, allowing the postnatal state to revert to the primordial. Without understanding this mystical inversion, empty discussions about the Dao become as laughable as viewing the sky through a bamboo tube.

The text then explains the core of Neidan practice: the Zhen trigram (symbolizing thunder), belonging to the Wood phase, represents mercury (symbolizing the original Shen/spirit) and originates from the Li trigram (southern fire). The Dui trigram (symbolizing marsh), belonging to the Metal phase, represents lead (symbolizing original Jing/essence) and is born from the Kan trigram (northern water). These four manifestations—Metal, Wood, Water, and Fire—must all return to the central True Earth (genuine intention) to form the Golden Elixir. The metaphor of "the child giving birth to the mother" illustrates the Yin-Yang inversion in cultivation: while Water and Fire normally generate Metal and Wood, in alchemical practice, Metal and Wood conversely regenerate Water and Fire.

Finally, the text emphasizes the crucial role of True Earth (genuine intention): without the presence of Wu and Ji Earth (the active and passive states of true intention), the Li and Kan trigrams cannot form the elixir even with all four manifestations present. When true intention functions, it harmonizes body and mind, fusing the four manifestations of Metal, Wood, Water, and Fire to complete the reversion process of the Golden Elixir. In its quiescent state, true intention is Ji Earth (passive); when responding to external stimuli, it becomes Wu Earth (active)—both rooted in the central palace (Dantian). Through the regulation of true intention, the condensation and return of Jing, Qi, and Shen can be achieved.

This passage explains the principle of mutual restraint and generation between Metal and Wood in Golden Elixir (Jindan) cultivation. Human nature (Wood) is originally pure and tranquil, but contact with the external world generates desires (Fire), much like how fire lies latent within wood. If left unchecked, the fire of desire can consume one's innate Qi (the Primordial Qi of Supreme Harmony), just as friction-generated fire consumes the wood itself.

To subdue this danger, one must employ the "Metal within Water" (Jingong, referring to the True Yang Qi within the Kan trigram). The nature of Wood is light and floating, while Metal is heavy and sinking. When the restless Wood nature (Wood Mercury) encounters the Metal nature (Metal Lead), it naturally becomes restrained. This transforms scattered consciousness into wisdom and returns desires to their original nature, achieving a state of mental stability. Metal controls Wood as Water controls Fire, thus preventing the calamity of desires consuming one's vital essence.

The latter section uses metaphorical language: Jingong (True Yang) originally belongs to the East (Qian trigram), but when Qian transforms into Li trigram, it becomes displaced into the Western Kan trigram—like an eastern family's child being fostered by western neighbors. The practitioner must use true intention (yi) as the medium to extract the True Yang from Kan and unite it with the True Yin (Chanü) from Li. When these two combine in the Dantian (the earthen crucible), it resembles a marital union—Metal and Wood natures naturally harmonize, allowing the Golden Elixir to be forged.

Here, "Chanü" refers to the True Yin within the Li trigram, while "Jingong" denotes the True Yang within Kan—both being specialized Neidan terminology. The entire cultivation process illustrates how the principles of Yin-Yang interaction and Five Phase dynamics lead to a harmonized state of body and mind.

This passage explains the core principle of "Kan-Li copulation" in Daoist Neidan (internal alchemy) practice, using the metaphor of marriage to illustrate the method of harmonizing Yin and Yang.

The Channü (literally "beautiful maiden," symbolizing the Yin mercury within the Li trigram, representing the heart-mind or Shen) is like a wandering young girl—naturally lively and restless, just as our Shen is easily distracted by external things. Practitioners must guide this scattered Shen back to the Central Yellow Divine Chamber (the middle Dantian), much like disciplining a wayward girl. The phrase "the outward journey should be brief, the inward return long" metaphorically suggests that the time spent with the mind wandering externally should be short, while the period of internal focus should be prolonged.

The "Yellow Matron" (Huangpo) in alchemical terms refers to the true intention, acting as a matchmaker facilitating union, while the "Golden Lord" (Jingong) represents the Yang lead within the Kan trigram (the primordial Qi). When the heart-mind (Channü) unites with the primordial Qi (Jingong), it is like a young woman settling into marriage, no longer drifting aimlessly. This union allows the Yin line in the Li trigram (heart-fire) to be transformed by the Yang line in the Kan trigram (kidney-water), ultimately restoring the pure Yang state of the Qian trigram.

The text emphasizes that these marital metaphors are merely aids for practitioners to grasp the concept and should not be taken literally or misconstrued as licentious imagery. True cultivation involves "extracting from Kan to replenish Li" (drawing the true Yang from kidney-water to supplement the true Yin in heart-fire), enabling the separated Kan and Li trigrams of the postnatal world to return to the innate unity of Qian (pure Yang) and Kun (pure Yin).

Finally, the passage notes that Kan-Li copulation is the pivotal stage of the Golden Elixir (Jindan) path. In the postnatal Bagua (Eight Trigrams), Kan (north) and Li (south) correspond to Kun and Qian in the prenatal Bagua, while Zhen (east) and Dui (west) correspond to the prenatal Li and Kan. Water and fire represent the essence of Kan and Li, while metal and wood symbolize their functions. Notably, the Kan trigram contains Wu-earth, and the Li trigram contains Ji-earth, subtly indicating the crucial role of true intention in harmonizing these forces.

This passage elucidates the core principles of harmonizing Yin-Yang and transforming the Five Phases (Wuxing) in Neidan (internal alchemy) practice. The metal and wood phases symbolize the dragon and tiger (referring to the Qi of liver and lungs), while water and fire represent lead and mercury (lead signifies the primordial Jing from kidneys, mercury denotes the primordial Shen from heart). True earth, also called the "Yellow Matron" (referring to spleen-earth that mediates harmony), fundamentally describes the interaction between the Kan (Water) and Li (Fire) trigrams.

The single Yang line within the Kan trigram represents the innate Qian (Heaven) essence, symbolizing the pure Dao-mind; the Yin line within the Li trigram contains acquired Kun (Earth) qualities, representing the human mind tainted by selfish desires. Practitioners must observe celestial patterns, using the heavenly Yang principle from Kan to dissolve the human desires' Yin within Li—this constitutes the work of "restraining selfishness to return to propriety." When the human mind fully transforms into the Dao-mind, the primordial Qian state is restored. This process moves from meticulous discernment (refinement) to unified purity (singularity), revealing the profound mystery of inverting Yin and Yang.

Originally, the inversion of Qian and Kun created Kan and Li, turning the innate into the acquired; now through cultivation, Kan and Li are inverted back to Qian and Kun, returning the acquired to the innate. With Qian restored, Yang Qi appears and withdraws across the six lines (symbolizing the precise control of firing times in practice). The crux of celestial circulation lies in mastering this energy. All transformations stem from consciousness—grasping the Dao of Qian's origin manifests celestial principles, forming the foundation for transcending mundanity. "Extracting from Kan to replenish Li" is the essential secret of the Golden Elixir (Jindan) path.

The text then details practical methods: using the body as the alchemical cauldron (Qian as head, Kun as abdomen), gathering solar and lunar essences (the crow representing sun, the hare representing moon) as medicinal ingredients. During practice, one must collect the heart-mind to unify body and consciousness in the middle Dantian (Yellow Court), merging Jing, Qi and Shen. This is the meaning behind "first making Qian-Kun the cauldron, then cooking with crow-hare medicine." When body and mind perfectly fuse in the middle Dantian, the Golden Elixir spontaneously forms. The entire chapter emphasizes that Golden Elixir cultivation must be achieved through deliberate methodical practice.

The key to cultivating the Golden Elixir (Jindan) lies in allowing the two energies of Yin and Yang to merge naturally, just as the sun and moon converge on the ecliptic (the sun's apparent path in the celestial sphere). Here, the crow (symbolizing the sun) and the hare (symbolizing the moon) represent the Kan and Li trigrams—Kan signifies water, while Li signifies fire. Only through their union can the sacred embryo (the nascent form of the Golden Elixir) be formed. The earlier mention of "extracting Kan to replenish Li" refers to harmonizing water and fire, ultimately returning to the pure Yang nature of the Qian (Heaven) trigram. These four brief lines encapsulate all essential elements of alchemical practice: the crucible and furnace (the body), the medicinal ingredients (Jing, Qi, and Shen), and the firing process (the rhythm of cultivation).

The text then elaborates on the method of "establishing the furnace and setting up the crucible" (laying the physical and mental foundation for practice). The golden crow in the sun symbolizes the essence of solar energy, while the jade hare in the moon represents lunar essence. The sun embodies true fire, whereas the moon inherently lacks light, shining only by reflecting sunlight—the dark portion of the moon is called Earthly Soul (Yin energy), while the luminous part is called Heavenly Spirit (Yang energy). The human body shares a similar Yin-Yang structure: the Li trigram (heart) is outwardly Yang but inwardly Yin, harboring true essence, while the Kan trigram (kidneys) is outwardly Yin but inwardly Yang, containing true radiance. In practice, one must use the true fire of the heart to illuminate the true radiance of the kidneys, much like the waxing moonlight symbolizes the revival of Yang energy.

The specific cultivation steps are as follows: First, gather and stabilize the spirit (turning vision and hearing inward) to establish the foundation of body and mind, unifying them as if forging a crucible. Then, regulate Jing and Qi through breathwork (Tuna). When Heavenly Spirit and Earthly Soul merge, a misty transformation occurs (a sign of Qi's dynamic stirring). It's crucial to understand that Yin and Yang are two aspects of the same unity—solar and lunar essences share the same origin but manifest differently. The profound subtleties of this process require guidance from an enlightened master, far surpassing ordinary knowledge.

This passage explains that the key to cultivating the Golden Elixir (Jindan, the core concept of Daoist Neidan/internal alchemy) lies in discovering the "true seed" (zhen zhongzi), which refers to one's primordial spirit (yuanshen) or true intention. Like Mencius' description of the Dao as "difficult to describe," Golden Elixir cultivation appears simple yet contains profound mysteries.

The text first mentions "setting up the furnace and establishing the cauldron" (anlu liding), referring to establishing the energetic system within the body. However, the true key lies in possessing the "medicinal ingredients" (yaowu) - the essential Jing (essence), Qi (vital energy), and Shen (spirit) required for cultivation. Just as cooking rice requires grain, if the cauldron lacks the true seed, merely burning an empty pot produces no meal. Many practitioners today only know elementary techniques like swallowing saliva and regulating breath (yanjin naqi), which are minor methods. The true Great Dao of the Golden Elixir must have this core "true seed."

Laozi (the Supreme Venerable Sovereign) said, "There was something formless yet complete, born before heaven and earth." This "something" is the origin that created all things. In humans, it manifests as the inborn "primordial spirit" (yuanshen, innate consciousness), called "true intention" (zhenyi) in alchemical practice - the "elixir catalyst" (dantou) for refinement. Like a fetus in the womb that initially just follows the mother's breathing until spiritual light enters to become truly human, Golden Elixir cultivation similarly requires using true intention to stabilize the primordial spirit and settle it in the central palace (Dantian) to coalesce essence and energy, forming the "embryo" (neidan/internal elixir).

If practitioners don't know to place this core in the central palace, it's like a house without its master - temporarily gathered essence and energy will scatter, like pointlessly burning an empty pot. The patriarchs warned: "If the cauldron lacks the true seed, you're just boiling water in an empty pot," reminding us of the catalyst's importance.

Many heterodox methods today misunderstand the true seed: some mistake postnatal semen for it, others ordinary breath-energy, and still others everyday conscious thought. These are all errors. The genuine true seed is the primordial spirit, which requires specific methods to awaken and nurture.

This passage elucidates the core principles of Daoist Neidan (internal alchemy) practice. The phrase "spirit (Shen) as the true seed" refers to one's innate nature—eternal and unchanging since beginningless time—though deluded people mistake it for ordinary consciousness. If this fundamental truth is lost, where can one find the genuine seed for cultivation? While this chapter primarily discusses the "true seed," it implicitly encompasses all essential elements of alchemy, including the cauldron, furnace, and firing process.

Even if one recognizes cinnabar (symbolizing the original spirit in the Li trigram) and black lead (representing the original essence in the Kan trigram), mastery remains futile without understanding fire modulation. The achievement of the Golden Elixir (Jindan) entirely depends on precise cultivation—the slightest deviation prevents elixir formation. Only after recognizing the "true seed" can practitioners utilize the refined energies of the Kan and Li trigrams. Yet while identifying the medicinal ingredients proves simple, mastering the firing process presents true difficulty. For fire cannot generate the medicinal substances, nor can the medicines form the elixir without proper firing. The secret lies in maintaining "true intention": neither allowing distracting thoughts (which overheats the process) nor mental dissipation (which weakens the fire). One must observe the interplay of movement and stillness while regulating temperature—all within a state of thoughtless awareness. This delicate balance proves more challenging than obtaining the medicines; the slightest error disperses vital energies, nullifying all progress.

What then constitutes true firing? The "true fire" is the practitioner's conscious intention, while the "true timing" manifests through breath rhythm. Using spirit to refine essence and energy into the elixir means harnessing primordial Qi through spiritual mastery—this embodies firing's ultimate meaning. Though this chapter focuses on firing, the medicines and alchemical vessels are inherently present. Understand that while cauldron, medicines, and firing appear as three concepts, they form an inseparable unity—mere provisional designations rather than absolute realities, fully comprehensible only to those with perfected insight.

Finally, the passage reveals the Golden Elixir's essence: the single point of true yang within Kan (white within black) forms the alchemical foundation, while the true yin within Li (female within male) establishes the sacred embryo's basis. Practitioners must tend their inner furnace with the vigilance of Great Unity Perfected Being (Taiyi Zhenren), gathering the three Dantian's energies to resonate with the Three Terraces stars. This chapter expounds the supreme principle of uniting essence, energy, and spirit (jing-qi-shen)—the "three families meeting." Earlier sections separately explained the cauldron, medicines, and firing; here they synthesize into holistic wisdom. The medicinal mystery ultimately resides in Kan and Li: Kan's pure yang and Li's pure yin—their union constitutes the Golden Elixir's fundamental truth.

This scripture expounds the core principles of Daoist Neidan (internal alchemy) practice. The so-called "Mother of the Golden Elixir" and "Foundation of the Sacred Embryo" refer to the innate primordial Qi within the human body. When the two energies of Yin and Yang intermingle, they form the state of "Taiyi Embracing the True." Upon reaching this realm, practitioners need only maintain a natural state, allowing the Jing (essence) and Qi within to transform spontaneously: primordial Jing becomes Qi, Qi becomes Shen (spirit), and ultimately Shen returns to emptiness. In this way, the three treasures of Jing, Qi, and Shen converge in the Dantian (three energy centers), corresponding to the celestial Three Terraces constellation, thereby completing the cultivation of the Great Dao of the Golden Elixir.

The second passage discusses seeking true Jing in the indistinct state between existence and non-existence. The "Great Medicine of the Golden Elixir" (referring to the fruits of cultivation) can only form through the union of the Kan (Water) and Li (Fire) trigrams, representing Yin and Yang. The "dim and indistinct" state mentioned in Laozi's Daode Jing refers to the true Yin within the Li trigram, while the "deep and obscure" state refers to the true Yang within the Kan trigram. Practitioners must seek true Jing in this special state—not through deliberate searching, but by allowing the natural fusion of Yin and Yang through the function of true intention (innate awareness). This state is a genuine realm of cultivation that must be personally realized to achieve the Golden Elixir; mere imagination is ineffective.

The third passage uses metaphor to explain the principle of the union of Metal and Wood. In alchemical practice, the Zhen trigram represents the eldest son (the Wood liquid within Li, symbolizing the Dragon and Mercury), while the Dui trigram represents the youngest daughter (the Metal essence within Kan, symbolizing the Tiger and Lead). During cultivation, the Dragon (Wood) must actively approach the Tiger (Metal), much like the eldest son drinking wine from the West or the youngest daughter blooming flowers in the northern garden. When these two energies are on the verge of merging, the practitioner must seize the moment, using true intention to facilitate their meeting and union in the Central Palace, the Yellow Court (Huangting). This passage describes the critical moment of Yin-Yang union in Neidan practice.

This scripture describes the process of "metal and wood merging" (jinmu jiaobing) in Daoist Neidan (internal alchemy) practice, where the Golden Elixir (jindan) is formed. The text employs symbolic imagery to depict the union of Yin and Yang and the meeting of dragon and tiger during cultivation.

The first passage explains that when the Azure Dragon of the East (wood nature) encounters the White Tiger of the West (metal emotion), their fusion in the middle Dantian (yellow court) mediated by the "Yellow Matron" (true intention) forms the embryonic form of the Golden Elixir (millet-sized pearl). Here, the "blue maiden" symbolizes eastern wood nature, while the "young maiden" represents western metal emotion, with their "meeting" metaphorically describing the initial union of Yin and Yang.

The second passage vividly portrays the dragon-tiger convergence: the roaring male tiger of Mount Hua (West) and the singing female dragon of the Fusang Sea (East). The male tiger embodies the true lead (yang within yin) from the Kan trigram, while the female dragon represents the true mercury (yin within yang) from the Li trigram. Through mediation by the "Yellow Matron," these forces unite like husband and wife in the middle Dantian to form the sacred embryo (nascent Golden Elixir).

The third passage continues with subduing the heart-mind: the rampaging White Tiger of Western Mountain (emotional desires) proves difficult to tame, while the Azure Dragon of Eastern Sea (inherent nature) resists control. Only through true intention's harmonizing influence—allowing their fierce struggle to culminate in fusion—can the "purple-gold frost" (great medicine) emerge, mirroring the earlier described elixir formation process.

The concluding passage synthesizes the process: the Crimson Dragon (Li fire) and Black Tiger (Kan water) originate from east and west respectively, while the four symbolic creatures (Azure Dragon, White Tiger, Vermilion Bird, and Dark Warrior) converge in the central earth of Wuji. Through cyclical application of the Fu hexagram (yang qi's initial growth) and Gou hexagram (yin qi's initial emergence), the Golden Elixir naturally matures. This reveals how the dual dynamics of metal and wood already encompass the transformations of the four symbols, hence the direct reference to "Crimson Dragon and Black Tiger" as comprehensive representations.

This passage explains the principles and process of Golden Elixir (Jindan) formation in Daoist internal alchemy (Neidan) practice. The "Central True Earth" (referring to the middle Dantian in the human body) harmonizes the five vital energies of spirit (Shen), essence (Jing), ethereal soul (Hun), corporeal soul (Po), and intention (Yi). When these energies converge at the Kun position (lower Dantian), they produce the great medicine of the Golden Elixir.

During cultivation, when Yang energy first emerges (symbolized by the Fu hexagram), the Celestial Root (the body's energetic source) begins stirring in the northeast. When Yin energy first appears (symbolized by the Gou hexagram), the Lunar Cavern (the gathering place of Yin energy) starts condensing in the southwest. The upper and lower crescent energies (representing Yin and Yang) unite into one, completing the Golden Elixir's refinement.

The text uses the moon's phases as a metaphor: when the moon is half full (either waxing or waning), internal signs of "dragon's hum and tiger's roar" (indicating the interaction of Yin and Yang energies) manifest. Seizing this moment for practice, the Golden Elixir can be formed within a single watch (two hours). Just as the full moon results from the merging of waxing and waning crescents, the Cantong Qi states: "Two eights make one pound" (Yin and Yang halves combine into wholeness).

The waxing moon symbolizes the White Tiger (Metal energy), while the waning moon represents the Azure Dragon (Wood energy), corresponding to the body and mind. When body and mind interact, the phenomena of dragon's hum and tiger's roar emerge. At this point, using true intention (primordial awareness) to harmonize them, Yin and Yang energies merge into one and return to the Kun furnace (lower Dantian), swiftly achieving the Golden Elixir.

The latter section emphasizes that Golden Elixir cultivation is ultimately simple. As the ancients said, "The radiant Golden Elixir is completed in a single day," yet people are often misled by notions of "three years and nine months." In truth, the Golden Elixir is one's original true nature (primordial essence). Those of superior capacity, upon realizing this principle, may attain enlightenment instantly. This dispels the common misconception that alchemy requires prolonged effort, pointing instead to the possibility of sudden awakening.

When you completely let go of all mental and physical attachments, maintaining a mind pure and untainted, your original true nature will spontaneously manifest. Once you illuminate the mind and perceive your true nature, the fundamental source of life (ming) is naturally encompassed within it. When the golden (primordial Qi) returns to its intrinsic nature, this is the achievement of the "returned elixir" (Golden Elixir). Hence it is said, "The radiant Golden Elixir can be attained in a single day."

This state resembles what Bodhidharma transmitted when he came from the West—"a single moment of awakening returns one to the source"—or what Confucius told Yan Yuan: "If for one day you could overcome yourself and return to ritual propriety, the whole world would turn to benevolence." This is the fundamental heart-method shared by the three teachings (Confucianism, Buddhism, and Daoism). It is not only the instruction of ancient immortals but also the common origin of these traditions. Practitioners should realize it immediately. Claims that it takes nine or three years to achieve are merely excuses made by those of dull capacity.

Understand that when true nature manifests, there is no room for delay. But why do alchemical scriptures mention "nine or three years"? It is like comprehending a principle—awakening can be sudden (like a newborn instantly possessing a complete body), but actual cultivation requires gradual refinement (just as raising a child takes years). Even if effort must be accumulated, why not first awaken to the root in a single day? Those with deep roots can directly point to the original mind.

Some may wonder: The previous chapter speaks of "a single moment," while this one mentions "a single day"? In truth, the length of time is illusory—the key lies in seizing the opportunity for sudden awakening. Once you grasp the mystery of Yin-Yang interaction, the duration becomes flexible.

Regarding cultivation methods:

• "Striking bamboo" (activating the Yang Qi in the kidneys),
• "Summoning the turtle" (arousing the primordial essence of the Kan trigram),
• "Swallowing jade mushrooms" (gathering the true Yin of the Li trigram);
• "Strumming the zither" (harmonizing Yin and Yang),
• "Calling the phoenix" (condensing the spirit-mind),
• "Drinking the knife-guide" (extracting the true Yang from Kan)—

these are all symbolic techniques of Golden Elixir refinement. Recently, golden light has shone through my body (a sign of Golden Elixir attainment), but such a state is difficult to explain to ordinary people.

This passage primarily elucidates the verification of Golden Elixir attainment. Though the previous chapter suggests it can be achieved in a day, its profundity is understood only by the wise. From the perspective of trigrams, it still revolves around Kan (Water) and Li (Fire):

• Bamboo symbolizes the empty, tranquil mind,
• The turtle represents the kidney Qi of the north (the Yang line in Kan),
• Jade mushrooms signify the true Yin of the spirit-mind (the Mercury in Li);
• The zither metaphorically refers to the harmonizer (Yellow Dame),
• The phoenix stands for the spirit-mind (the Yin line in Li),
• The knife-guide symbolizes the true Yang in the kidneys (the Lead in Kan).

The entire alchemical work is guided by the true intention in the central palace (the origin of consciousness).

To cultivate the Golden Elixir (Jindan) of the Great Dao, one must first relinquish all worldly distractions and maintain a mind clear as an empty mirror. At this stage, the true Yang Qi from the Kidney Water (represented by the Kan trigram) is awakened to harmonize with the true Yin Qi from the Heart Fire (represented by the Li trigram). With pure intention as the guide, these two energies naturally merge—like striking a bamboo tube to rouse the spiritual turtle feasting on celestial herbs, or plucking the zither to summon the phoenix sharing in divine nectar. When Yin and Yang energies fully unite, the Golden Elixir crystallizes. An inner radiance then emerges, illuminating the body with golden light that ascends to the heavens, bathing all creation in its glow. Such a mystical state is beyond the comprehension of those burdened by doubt and scattered thoughts. As the patriarchs taught: "When golden light recently suffused my entire being, there was no need to explain its profundity to the mundane." This is the true confirmation of the Elixir's completion—no illusion or falsehood.

In the poem, the "Crescent Moon Furnace" (Yanyue Lu) refers to the Dantian (energy center), the sea of Qi, while the "Jade Stamen" (Yu Rui) symbolizes the true Yang within the kidneys (also called "silver in water"). The "Cinnabar Cauldron" (Zhusha Ding) denotes the upper Dantian, and the "Mercury" (Shuiyin) represents the true Yin in the heart (also called "cinnabar within vermilion"). These two energies must remain balanced, with the key lying in precise control of the refining fire (huohou). When the mind is pure and focused, and the fire is tempered just right, the seed of the Golden Elixir—the "Yellow Sprout" (Huangya)—naturally germinates and grows. This underscores the critical importance of nurturing the fire with care during alchemical practice.

True alchemy requires no attachment to external furnaces; the essential task is to discover the innate "Crescent Moon Furnace" within the body. Humans inherently possess primordial true fire (Yuanqi)—why rely on ordinary firewood and bellows like mundane flames? Here, the text particularly highlights the pivotal moment when the "great medicine" (Danyao) nears completion and Yang energy first stirs. The "Crescent Moon Furnace" vividly captures this subtle state, where internal energy emerges like the faint glow of a new moon.

This scripture elucidates the essential principles of "medicine production" and "nurturing refinement" in Daoist Neidan (internal alchemy) practice. When true Yang (primordial Qi) naturally unites with true Yin (primordial Shen) within the Li trigram, when spirit and breath mutually embrace, and respiration returns to its origin, it resembles the celestial conjunction of sun and moon during lunar obscurity. Just as the moon receives solar essence to form its embryonic phase, the golden crescent emerging in the west on the third day symbolizes the Zhen trigram (initial Yang movement) - the authentic manifestation of the "great medicine" (Golden Elixir) entering the alchemical furnace.

To attain this state, practitioners must cultivate mental emptiness, maintain profound stillness, and reach a condition of ultimate vacuous tranquility. This bears no relation to later-stage impurities or artificial alchemical methods. True alchemy requires neither earthen furnaces nor charcoal fires, only the discovery of the "reclining moon furnace" (the Dantian energy center). After the genuine medicine emerges, it must be refined with true fire (primordial Qi) - which fundamentally means preserving natural respiration and pure intention while awaiting the spontaneous maturation of the "true seed" (Golden Elixir), entirely without external assistance.

The text further explains the nurturing process after the great medicine enters the furnace. The lunar phases of first quarter (ascending moon) and last quarter (descending moon) symbolize the Yin-Yang equilibrium of the Golden Elixir. The ascending moon's black containing white represents metallic essence, while the descending moon's white containing black represents aqueous foundation. When these complementary halves unite to form the full moon, the medicine achieves perfect maturation. After gathering and returning the medicine to the furnace, practitioners must nurture it with the delicate care of simmering fresh fish - neither rushing nor forcing, maintaining a continuous subtle presence until the medicine naturally completes its perfection. This mirrors Laozi's admonition that "governing a great nation resembles cooking small fish" in its requisite caution.

The passage emphasizes natural conformity in cultivation, advocating patient waiting for the spontaneous emergence of primordial medicine within vacuous stillness while rejecting artificial striving. Through lunar phase metaphors, it illustrates the process of Yin-Yang union and medicine generation, highlighting how Golden Elixir refinement requires balanced fire regulation and harmonious maintenance.

This passage discusses two crucial practices in cultivating the Golden Elixir (Jindan), the core concept of Daoist internal alchemy (Neidan): "tender nurturing" (wenyang) and "bathing purification" (muyu).

The text first explains the essentials of mind-body cultivation: harmonizing body and mind through true intention (zhenyi, pure consciousness free from distractions), merging them into unified wholeness—this constitutes the foundational practice. Maintaining this state while simultaneously releasing deliberate effort represents the "tender nurturing" stage. During this phase, practitioners must avoid unnecessary complications, as it coincides with the critical moment of "medicine production" (neidan terminology for the coalescence of essence (Jing), vital energy (Qi), and spirit (Shen)), requiring precise fire modulation that connects with the "Mao-You bathing purification" discussed later.

The passage then clarifies the significance of "bathing purification": during the Rabbit month (Mao month, second lunar month) and Rooster month (You month, eighth lunar month), or daily during the Mao (5-7 AM) and You (5-7 PM) hours, yin and yang energies enter a unique dynamic. At Mao hour, yang energy contains yin; at You hour, yin contains yang—analogous to metal concealed within wood and wood within metal, creating the subtle equilibrium of "punishment and virtue converging" (where punishment represents restraint and virtue signifies generative power). These are pivotal moments when the "great medicine" enters the crucible for Golden Elixir crystallization, demanding complete mental stillness. The slightest distraction may undo the entire process.

The method involves returning consciousness to emptiness (xu)—a state maintained only momentarily. The "Mao-You" references serve metaphorically; actual practice need not rigidly observe these temporal markers. This represents the most esoteric stage of elixir cultivation, nearly impossible to master without guidance from an enlightened teacher.

Finally, the text employs sword-forging as allegory: Like Ou Yezi's (ancient master swordsmith) secret metallurgical methods requiring exact metal-water ratios and mastery of hardness-softness principles, the perfected Golden Elixir becomes a numinous sword that effortlessly cleaves through obstacles. This "Golden Elixir Wisdom-Sword" (the realized power of cultivated wisdom) must coordinate with the aforementioned bathing purification techniques.

This passage explores the profound mystery of the "Wisdom Sword" in Daoist Neidan (internal alchemy) practice. The author employs the metaphor of sword-forging to illustrate the alchemical process: just as crafting a sword requires tempering with metal and water, inner cultivation necessitates the refinement through "metal and water" (symbolizing the Yin and Yang energies). These two forces—one firm (metal) and one yielding (water)—must harmonize perfectly, much like the legendary swords Ganjiang and Moye required complementary pairing to become treasures. Similarly, Neidan demands flawless coordination of Yin and Yang energies.

The "two crescents" mentioned refer to these Yin and Yang energies, whose subtle applications can only be mastered through transmission from an authentic teacher—just as the secrets of sword-forging had to be personally taught by the ancient master Ou Yezi. When these energies are tempered by true fire within the Dantian (the "Kun furnace"), they transform into the "Wisdom Sword." This blade possesses unparalleled sharpness, capable of severing all distracting thoughts—it is, in essence, the innate spiritual radiance (original wisdom of the mind).

The author emphasizes that this "Wisdom Sword" is not a physical object but represents the practitioner's true intention (the "Central Yellow Sovereign," or primordial Shen/spirit). During cultivation, when the "great medicine" (the inner elixir) enters the furnace, any intrusive thoughts ("Yin demons") can be instantly dispersed with a single stroke of this sword. The three swords mentioned by Patriarch Lü (Lü Dongbin)—cutting through desire, afflictions, and ignorance—refer precisely to this mental discipline.

The latter section explains that the key to alchemy lies in balancing lead and mercury (Yin and Yang). True lead (primordial Qi) forms the foundation, but it must unite with true mercury (the Shen) to succeed. Though their natures differ (Yang being expansive, Yin contractive), through the mediating power of true intention, equilibrium is achieved, ultimately forging the Golden Elixir. Just as moonlight perpetually illuminates the western rivers (symbolizing the constancy of true lead), practitioners must recognize that primordial Qi is the fundamental source.

To attain the Golden Elixir (Jindan, the highest achievement of Daoist Neidan/internal alchemy), one must maintain the balance of Yin and Yang, perfectly merging innate True Lead (representing primordial essence/Jing) with mundane post-heaven lead (turbid acquired essence). This is like the convergence of the sun and moon at the ecliptic during the lunar month's transition (between its last and first days), where the watery soul of the Great Yin (moon) absorbs the golden essence of the sun, forming the image of the Golden Toad (a symbol of the Elixir's initial manifestation). By the third lunar day, a crescent moon appears in the west—this is the Golden Toad emitting light, signifying the nascent formation of the Great Medicine (the Elixir). Thus, to locate True Lead, observe how the toad's radiance perpetually illuminates the Western River (the west corresponds to Metal, the river to Water, symbolizing gold concealed in water). This perpetual illumination indicates the Golden Elixir can be swiftly accomplished in a short time.

This chapter describes the same phase as previous sections. Only after completing the stages of gentle nurturing and purification (breath regulation in Neidan practice), aided by the Sword of Wisdom (the power of concentration to sever distractions), is the cultivation of the Golden Elixir perfected. At its completion, the first stirrings of Yang energy arise, which can then be gathered and refined (guided by intention to circulate essence and Qi), ultimately coalescing into the Great Returned Elixir (the highest form of internal alchemy).

The brilliance of the toad (symbolized by the full moon) on the 15th day of the eighth lunar month marks the peak potency of the Golden Essence (the Elixir's quintessence). When the first Yang energy returns (its initial emergence), one must immediately "stoke the fire" (intensify meditative focus) without delay. This chapter emphasizes the critical moment just before the Great Medicine's formation, when timely gathering is essential. The earlier reference to "the toad's light perpetually shining on the Western River" points to gold within water—precisely the Golden Essence discussed here. The convergence of the waxing and waning moons (Yin and Yang energies) into fullness mirrors the eighth month (associated with autumn and the Metal phase), when golden Qi is most vigorous—hence the mid-autumn moon's exceptional brilliance. This metaphor illustrates how, during the union of Kan (Water) and Li (Fire), gold suddenly emerges from water, heralding the Great Medicine's imminent completion.

The phenomenon of gold emerging from water is called the "Living Zi Hour" (the moment of vital energy activation in practice). Here, the flourishing of Golden Essence signals the arrival of this auspicious time. At the first stirring of Yang beneath pure Yin, it must be immediately gathered as the foundation for the Returned Elixir. Hence the lines: "When the first Yang returns to initiate renewal, stoke the fire without hesitation"—underscoring the urgency of harvesting the nascent Great Medicine.

The initial movement of Yang is the optimal moment for alchemical work, with the Lead Cauldron (Dantian) warm as if bathed in radiant light. While receiving primordial Qi is relatively effortless at first, the processes of "extracting and replenishing" (adjusting the fire's intensity) and "circulating the fire" (guiding essence and Qi) demand caution to avoid peril. This chapter stresses vigilance during the gathering and refinement of the medicinal ingredients, warning of potential dangers. Though harvesting is easier when gold emerges from water and Yang first stirs, the fire's regulation must be exquisitely precise—lest the endeavor falter.

This passage explains the crucial timing in Neidan (internal alchemy) practice, the Daoist method of cultivating inner energy. When the "golden essence" (vital life force) within the body reaches its peak potency, it marks the optimal moment for cultivation, known as "living midnight" (not an actual time but a physiological state). At this stage, the freshly emerged "medicine sprouts" (refined Jing-Qi) remain tender and must be promptly gathered and refined.

Master Lü Dongbin (one of the Eight Immortals) described this state as "the warm lead cauldron radiating light through the curtains." The "lead cauldron" metaphorically represents the lower Dantian (energy center in the lower abdomen), which feels warm and luminous at this phase. Thus the scripture states "the first stirring of Yang" (initial activation of vital energy) signals the perfect moment for alchemical work, when the Dantian's warmth generates light illuminating the entire body.

Practitioners must seize this opportunity to "apply fire" (direct energy through focused intention). During the energy's ascent and descent, its fluctuations demand utmost caution. Careful practice swiftly yields the "alchemical medicine" (cultivation results), called "auspicious Qi reception"; negligence causes instant loss of opportunity, termed "guarding against peril." Hence the text warns: while initial energy reception comes easily, regulating the "fire degree" (cultivation intensity) requires vigilant risk management.

"Extraction and replenishment" refers to balancing Yin-Yang energies (lead representing Yin, mercury symbolizing Yang) during medicinal substance collection; "fire application" denotes controlling energy circulation through refined cultivation. The previous chapter discussed initiating fire at Yang's first stirring, while this chapter details its application methods—a seamless progression.

The text further correlates golden elixir cultivation with celestial cycles. As the moon completes its 29.5-day orbit to conjoin the sun (lunar-solar conjunction), Neidan's profound art condenses a year's work into a month, a month's into a day, and a day's into a single watch (two-hour period). Medicine-gathering moments perfectly synchronize with cosmic creative rhythms.

Before medicinal substance emerges, practitioners maintain receptive stillness—"guarding the city"; upon its appearance, they respond actively—"open combat." This fire-degree precision tolerates no error. Those who foresee dangers and navigate auspicious moments can elevate the "great medicine" (advanced energy) from the lower Dantian (Kun furnace) to the upper Dantian (Qian crucible), nurturing it in the yellow court (middle Dantian) until complete maturation.

Continuing the preceding two chapters, this section clarifies how initiating fire at Yang's first stirring—while minding its perils—allows the great medicine to enter the Dantian, radiating spiritual light. Each interlocking stage demands exacting precision throughout this seamless alchemical process.

This passage discusses the verification phenomena that occur during the cultivation of the Golden Elixir (Jindan, the core concept of Daoist Neidan practice referring to the crystallized life energy formed through refining essence, qi, and spirit). The previously mentioned "spiritual cinnabar" refers precisely to this supreme medicine of the Golden Elixir—the primordial qi (the fundamental energy of the cosmos)—which can only be obtained in a state of profound stillness, free from thought and action (Wuwei), much like Zhuangzi's metaphor of the "Mysterious Pearl from the Crimson Waters" that naturally manifests in a state of unconscious awareness. Through cultivation practices such as gathering, refining, and nurturing, when all yin energies are purified and the pure yang nature is revealed, the Golden Elixir can transcend the mortal body and ascend to the celestial cauldron (the upper Dantian) at the crown of the head. This marks the foundation for the transformation of life.

The phrase "frost flying in the tenth month" symbolizes the scene of the Golden Elixir reaching maturity. Here, "ghosts" represent yin energies, while "spirits" embody yang energies. When the Golden Elixir takes form and transcends the duality of yin and yang, even ghosts and spirits cannot fathom its profundity. It is crucial to distinguish between the emergence of the Golden Elixir and the return of the Elixir: the former occurs when yang energy reaches its peak and yin energy recedes, whereas the latter happens when yin energy is at its zenith and yang energy begins to arise—these represent two distinct stages of cultivation.

The subsequent passage describes the elevation of life's state upon successful Golden Elixir cultivation. The "Jade Pool" (Yaochi) symbolizes the lower Dantian (the earthly furnace), while the "Purple Tenuity" (Ziwei) represents the upper Dantian (the celestial cauldron). When the primordial qi circulates within the body, it is akin to drinking immortal wine from the Jade Pool, filling the spirit with radiance like the full moon. As the Golden Elixir ascends from the lower Dantian to the Muddy Pellet Palace (the heavenly valley) at the crown, it resembles riding a golden dragon to soar into the Purple Tenuity Palace. Upon reaching this stage of cultivation, one transcends the cycles of life and death, remaining unperturbed even as seas turn into mulberry fields and time transforms the world.

This represents the highest realm of Daoist cultivation—the Jade Pure Sacred Realm (one of the Three Pure Realms where the Celestial Worthy of Primordial Beginning resides). When practitioners reach this stage, all the body's joints and myriad spirits converge here, allowing them to meet face-to-face with the immortals of the Great Canopy Heaven (the highest celestial realm in Daoism). No matter how the mortal world transforms—seas turning to mulberry fields or mountains sinking into valleys—the practitioner's primordial spirit (Shen, the innate true spirit) remains eternal and unchanging. This is the true meaning behind the Dao De Jing's teaching that "the valley spirit never dies." While previous chapters spoke of startling ghosts and deities, this section describes the gathering of immortals, demonstrating the profound wonder of the Golden Elixir's life-establishing power.

Do not pursue false cultivation methods—focus only on the true path to longevity. During practice, the body produces an "immortal wine" that extends life, while the cauldron furnace (the inner alchemical crucible within the body) condenses a "jade nectar" capable of reviving the dead. This chapter summarizes the complete efficacy of Golden Elixir (Jindan) cultivation and introduces the subsequent stage of "returned elixir" (advanced alchemical transformation). The earlier mention of "drinking jade nectar from the Jasper Pool" refers precisely to this deathless method. But what is meant by "the other's house"? In cultivation, nature (Xing, spirit) is the host—the true self—belonging to internal medicine; life (Ming, physical vitality) is the guest—external phenomena—belonging to external medicine. Practitioners must first cultivate life techniques before refining spiritual nature, beginning with external medicine until the original guest becomes the host. This mystical reversal of roles is thoroughly explained in the scriptures. Techniques like Daoyin (guided stretching), breath ingestion, or consuming mist and dew are merely futile minor arts—only the Primordial Qi (the most fundamental life energy) obtained from emptiness can transcend life and death. Hence the instruction to abandon false methods and adhere to true longevity. When the Great Medicine (the refined essence of advanced practice) manifests, drawing it inward constitutes "returning to the root and restoring life," reviving withered bones. When Yang energy rekindles, guiding it into the Yellow Court (Dantian) accomplishes "reverting to the origin and restoring the source," recalling scattered souls. Thus the body produces life-extending immortal wine, and the cauldron condenses soul-returning jade nectar. The profound mystery of host-guest reversal fully manifests the Golden Elixir's function here, marking the beginning of returned elixir practice. Some heterodox schools misinterpret "the other's house," straying into vampiric practices—such transgressions are truly unforgivable.

Like pouring pure ghee (symbolizing cultivation's refined essence) into the Eastern Sun's Creation Furnace (the body's alchemical cauldron), if one can advance northwest past Mount Kunlun (representing cultivation's challenges—the northwest symbolizes the Qian position of pure Yang), they'll attain the realm of Golden Liquid Returned Elixir (Jinye Huandan), just as Zhang Qian met the immortal Magu. This chapter describes that very process. The previously mentioned longevity wine and soul-reviving nectar both...

The verification of cultivating the Golden Elixir (Jindan, the core achievement of Daoist Neidan practice) is indeed profoundly mystical. However, without undergoing the fierce fire tempering to form the Returned Elixir (Huandan, the refined essence after multiple purifications), the work of the Ninefold Cycled Golden Elixir (Jiuzhuan Jindan, the purest elixir refined nine times) cannot be considered complete. The wondrous function of the Returned Elixir always relies on the "metal within water" (Shuizhong Jin, the innate primordial Qi concealed in kidney water), hence the use of pure ghee (a Buddhist metaphor for supreme truth) as an analogy.

The Nirvana Sutra states: On the snow mountain, there is a robust white ox that, after feeding on lush grass, excretes dung that transforms into ghee, free of any impurities. Here, the snow mountain symbolizes the nature of metal (the essence of the Golden Elixir), the white ox represents the purity of this metallic nature, and the single-flavored ghee is none other than the Primordial One Qi (Xiantian Yiqi, the cosmic source energy), born from emptiness—this is the "metal within water." The metallic nature remains uncontaminated, pure, and steadfast, first arising in the west (the direction of Geng, representing the western metal position) before turning eastward, ascending to the crown of the head (the Qian position), and being drawn into the Yellow Court (Huangting, the Dantian region). Is this process of refinement not akin to the crucible of cosmic creation? All the elixirs of longevity and the jade nectar that revives the dead are here transformed into the finest ghee, indistinguishable from one another. Hence the saying: "The snow mountain yields a single flavor of exquisite ghee, poured into the crucible of creation in the eastern sun."

Once the Golden Elixir enters this cosmic crucible, at the exact moment of the True Midnight (Zheng Zishi, the pivotal time of Yin-Yang transition), the River Chariot (Heche, the celestial cycle in Neidan practice) is set in motion. The True Fire gathers to bear the Golden Essence (Jinjing), fiercely tempering it until it ascends to the crown (symbolized by Mount Kunlun). At this point, Heaven and Earth's Yin and Yang intermingle, and a drop of Golden Liquid (Jinye, the refined essence) descends back into the Yellow Court, completing the Sacred Embryo (Shengtai, the nascent form of the inner elixir). Thus it is said: "Only by passing northwest of Mount Kunlun does Zhang Qian finally meet Magu"—Zhang Qian (the Han dynasty explorer) represents the ascent of Yang energy against the current to seek its source, while Magu (the immortal maiden) symbolizes Yin energy. Their meeting embodies the alchemical principle of reversing Yin and Yang.

The final four lines reveal the key to cultivation: the True Fire in the kidneys (Kan lightning) refines the Golden Water (kidney essence), and the True Yang Fire activates from the crown (Kunlun). If the two energies of Yin and Yang perfectly fuse, the Golden Elixir naturally matures, suffusing the body with an extraordinary fragrance. This passage primarily explains how the union of inner and outer medicines achieves the Great Returned Elixir (Dahuan Dan, the highest-grade inner elixir). The core of Golden Elixir cultivation lies in extracting that spark of True Yang (Primordial Qi) from kidney water, igniting the wondrous interaction of water and fire through the Xuwei point (a critical energy node in the body), and ultimately guiding it back to the Cauldron of Qian (the crown) to crystallize the Golden Elixir.

This passage describes the complete process of "returning the elixir" (Huandan) in Daoist Neidan (internal alchemy) practice, divided into three stages: refining the external medicine, uniting it with the internal medicine, and the nurturing phase.

The first stage involves refining the external medicine. Practitioners must wait for the Zi hour (11pm-1am) when Yang energy first stirs, then apply "fierce fire" training (referring to concentrated intention and breath control) to transport the Jing (essence, represented as metal) to the crown of the head (symbolized as Mount Kunlun). The process progresses from the initial appearance of one Yang line to the complete six Yang lines (Qian hexagram state), and conversely from one Yin line to six Yin lines (Kun hexagram state). When the Qian and Kun (Yin-Yang) energies perfectly unite, a spark of true Yang descends into the Yellow Court (Dantian region), forming the internal medicine. At this point, the external and internal medicines merge into one.

The subsequent nurturing phase requires gentle cultivation. Like tending crops, this stage demands no forced effort—simply maintain constant care in the "field of the heart" (the metaphorical cultivation space within). Let the true breath (natural respiration) remain unhurried and unconstrained, neither deliberate nor lax, mirroring the natural states of "a dragon holding its pearl" or "a hen brooding over eggs." When the practice matures, the practitioner will naturally achieve complete bodily purification and emit extraordinary fragrances, transforming the mortal body into a sacred embryo (the immortal form attained through cultivation).

A crucial reminder follows for practitioners regarding the "fire timing" (Huohou, the regulation of practice intensity): before achieving the returned elixir, diligent practice is essential, but after its completion, one must know when to stop. Persistent advancement without rest leads instead to failure. The initial vigorous practice serves to "perfect life" (enhancing physical vitality), while the subsequent Wuwei (non-action) cultivation achieves "perfecting nature" (realizing one's true essence). This resembles crossing a river—the raft is necessary for passage but should be abandoned upon reaching the shore.

The text comprehensively outlines the Neidan progression from active practice to Wuwei, emphasizing the importance of natural nurturing and the crucial balance between knowing when to advance and when to rest in cultivation, maintaining harmony between Yin-Yang and practicing contentment.

When cultivating Neidan (internal alchemy) reaches a certain stage, one must understand the principle of knowing when to stop. If the Golden Elixir has already been perfected yet one still endlessly pursues external goals, refusing to cease and constantly exhausting the spirit through deliberate effort, it is like clinging to the raft after already reaching the far shore. Not only will this prevent complete awakening to the original source of mind-nature, forever barring liberation, but even the hard-won treasures of life-cultivation cannot be truly enjoyed.

Thus, if greed remains insatiable, one will ultimately encounter stagnation and disgrace. Practitioners should note: before attaining the Golden Elixir, failure to recognize the importance of "lower De (Virtue)" (the acquired efforts of cultivation) leads to empty theorizing; after attaining it, failure to comprehend the mystery of "upper De" (the innate natural state of Wuwei/non-action) results in attachment to form. This is why completing life-cultivation must be accompanied by realization of mind-nature.

When Heaven and Earth's Yin and Yang interact harmoniously, all things flourish and grow. The hexagrams Zhun (symbolizing birth) and Meng (symbolizing enlightenment) contain the profound mechanisms of creation. True understanding transcends the surface imagery of the hexagrams—fixation on every line transformation traps one in appearances.

These chapters all discuss the essential techniques of Great Returning Elixir cultivation, where the subtlety of "fire times" (the regulation of intention during practice) especially must not be constrained by hexagram imagery. Only the Zhouyi (Book of Changes) can verify the principles of fire times: innate Changes establish fundamental orientation, while acquired Changes emphasize interactive functions. The hexagram Pi (Heaven above, Earth below) signifies non-interaction of Yin-Yang, while Tai (Earth above, Heaven below) signifies their union. The moment of Qian-Kun (Heaven-Earth) coupling in cultivation marks the critical transition from stagnation to harmony. Within this, the advancing and retreating sequence of Yang fire (rising intention) and Yin tally (descending breath) completes a celestial cycle in an instant, encompassing all hexagram transformations.

The Zhouyi's placement of Zhun and Meng after Qian and Kun carries deep meaning. Once Heaven and Earth unite, the myriad things filling the cosmos naturally begin to transform. Zhen (thunder, one Yang stirring) below Kan (water) symbolizes the "morning Zhun" scene of nascent life; Gen (mountain, one Yang resting) above Kan represents the "evening Meng" state of mature form. This interplay of movement and stillness, birth and completion, embodies the mystery of Elixir refinement.

In actual practice: initially, gather primordial Jing (essence) and Qi at the perineum (Crooked River), accumulating true fire to ascend to the crown (Kunlun)—this is the morning Zhun phase, the moment when innate Yuanqi (Celestial Root) sprouts. Later, complete the Qian-Kun coupling at the crown (Celestial Valley); after celestial circulation, condense it in the Dantian (Elixir Cauldron)—this is the evening Meng phase, the moment the Golden Elixir is achieved.

This scripture primarily explains how to correctly understand the relationship between trigrams (gua) and firing times (huohou) in Neidan (internal alchemy) practice. It reveals that the waxing and waning of the moon (symbolized as the "lunar crucible") reflects the cyclical movement of Jing (essence) and Qi (vital energy) within the body. When essence-energy fills the three Dantian (upper, middle, and lower energy centers), it mirrors the flourishing vitality of all creation.

Although Neidan cultivation borrows the hexagrams from the Book of Changes for illustration, its essence lies in comprehending the dynamic interplay of Yin-Yang transformation to guide the rhythm of "advancing the fire" (strengthening Yang energy) and "retreating the tally" (regulating Yin energy). Rigidly following prescribed sequences—such as practicing the Zhun and Meng hexagrams at fixed morning and evening hours—would be as absurd as a fool's deluded dreams. The true secret of firing times resides in grasping their inner principles rather than clinging to superficial appearances.

The scripture emphasizes that terms like "cauldron and furnace," "medicinal substances," or "dragon-tiger and lead-mercury" in alchemical texts are merely metaphors—like fingers pointing at the moon, where the moon itself matters more than the pointing finger. Obsessively following trigram symbols or mechanically practicing two hexagrams at dawn and dusk while fantasizing about ascension is sheer confusion. Authentic cultivation requires aligning with nature's rhythms of Yin-Yang expansion and contraction, just as heaven and earth alternate between fullness and emptiness. Only by discerning the pivotal moments of life (represented by Jia, the celestial stem of growth) and restraint (Geng, the stem of harvest) can one master the proper timing for practice.

Particular attention is given to the celestial cycle of the Mao-You (east-west) orbit, revealing that the subtlety of firing times lies in harmonizing with natural Yin-Yang fluctuations. By observing the innate Bagua (Eight Trigrams) arrangement—with Qian (Heaven) in the south and Kun (Earth) in the north, the sun rising in the east and the moon appearing in the west—one comprehends the principles of waxing and waning energies. Yang energy reaches its weakest at midnight (Zi hour) and peaks at noon (Wu hour). These natural patterns form the immutable laws that cultivation must follow.

This passage reveals the mysteries of Yin-Yang waxing-waning and the timing of fire phases (huohou) in Neidan (internal alchemy) practice. Among the twelve two-hour periods of the day, the mao hour (5-7 AM) brims with irrepressible vitality, while the wu hour (11 AM-1 PM) shows Yin at its weakest and the zi hour (11 PM-1 AM) at its peak. By the you hour (5-7 PM), the autumnal energy of decline becomes irreversible—yet life and death always coexist interdependently, with the crucial point being to grasp the subtle laws of their transformation.

All phenomena between heaven and earth follow natural rhythms of waxing and waning; only by understanding these patterns can one master the timing of cultivation. The cyclical fire phases of alchemy mirror the creative processes of the cosmos: when Yin reaches its zenith, Yang begins to sprout (during zi hour, six Yang lines ascend from earth), and when Yang peaks, Yin first appears (during wu hour, six Yin lines descend from heaven)—forming a vertical north-south energy channel. The human body inherently contains its own sun (left eye) and moon (right eye), whose east-west movements create a horizontal energy network. When the Metal (lungs) and Wood (liver) energies aren't fully harmonized, the Water (kidneys) and Fire (heart) cultivation must continue.

After the grand convergence of Qian-Kun (heaven-earth) energies during the celestial cycle's fire phases, one should mobilize the body's solar-lunar energies like the revolving Big Dipper. Through continuous circulation (from lower to upper Dantian, cycling left and right), Yin gradually recedes while Yang expands, transforming original Jing (essence) into Qi (vital energy), then into Shen (spirit) returning to emptiness. This naturally eradicates the Three Corpses (sanshi)—malevolent parasites in Daoist physiology: Upper Corpse Pengju (in the head), Middle Corpse Pengzhi (in the chest), and Lower Corpse Pengqiao (in the abdomen). On Gengshen days (specific calendrical dates), these corpses supposedly ascend to heaven to report human transgressions. While observing Gengshen rituals can suppress them, direct Neidan practice proves more effective. When mao-you hour energies are properly balanced with Yin fully purged and Yang purified, the Three Corpses vanish without confrontation.

When the Four Symbols (Green Dragon, White Tiger, Vermilion Bird, Black Tortoise) converge and the Five Phases (Wood, Fire, Earth, Metal, Water) complete, violet radiance manifests within. After the Golden Elixir undergoes its metamorphosis and "enters the mouth" (returns to the Dantian), one attains divine communion—startling even celestial dragons. Initially, the Four Symbols converge in the central palace (Dantian) to form the elixir's prototype (Mysterious Pearl). Through "gathering fire to carry metal" (condensing energy to refine essence), it ascends inversely to the head's Qian palace for repeated tempering. With sustained nurturing, when all Yin qualities are stripped away to reveal pure Yang—like refined gold—the process reaches completion.

When a practitioner reaches the state where "smoke disperses and fire extinguishes," they forge the Dragon-Tiger Returned Elixir (referring to the harmonized yin-yang Neidan). At this stage, the Qi of the five organs (Five Phases energy) converges in the upper Dantian (head), while the three blossoms of Jing (essence), Qi (vital energy), and Shen (spirit) gather at the crown. Vast righteous energy fills heaven and earth, and the light of wisdom illuminates the cosmos. This manifests as the radiant purple glow that appears when the Four Symbols (Azure Dragon, White Tiger, Vermilion Bird, Black Tortoise) unite and the Five Phases (Metal, Wood, Water, Fire, Earth) become complete.

Reaching this phase equates to recreating one's nature and life, rebuilding the cosmic order. Earthly predispositions transform into true nature, and acquired consciousness (Shishen) reverts to primordial spirit (Yuanshen), achieving self-transcendence beyond heaven-earth constraints. Yet practitioners must continue forgetting external attachments, relinquishing physical form, accumulating merit through cultivation, and nurturing the sacred embryo (Neidan). When conditions ripen, the spiritual elixir naturally detaches and is swallowed. In that instant—like clouds surging, rain descending, thunder roaring, and lightning flashing—all yin turbidity dissipates instantly. One transcends mundanity to sagehood, astonishing ghosts and deities while celestial dragons rush to protect. This marks the phenomenon of spiritual awakening that startles divine dragons.

The specific mention of "entering the mouth" signifies the Returned Elixir's rebirth, distinct from earlier Golden Elixir transformations. This scripture, meticulously revised, outlines clear cultivation stages: first revealing Dao's origin, then explaining medicinal ingredients (cultivation materials) and furnace-cauldron (practice space), followed by Kan-Li (yin-yang) interaction to form the Golden Elixir through gathering and nurturing techniques, culminating in Qian-Kun (heaven-earth) union forging the Returned Elixir via tempering and nourishing. Only after progressing through these steps does one witness the verification of spiritual rebirth—an impeccably ordered sequence.

The medicinal ingredients take form only when encountering kindred Qi, just as Dao resides in emptiness following natural law. Swallowing a single spiritual pellet reveals one's destiny no longer governed by heaven. This chapter elucidates the Returned Elixir's power to transform fate. Its cultivation begins with conscious effort (youwei) and culminates in effortless attainment (wuwei). Active practice completes life cultivation (minggong), while non-action perfects nature cultivation (xinggong). Initially, one must gather true yin and yang (primordial energies), where kindred resonance refines the great medicine. When the Mysterious Pearl (Neidan) forms and the Supreme Unity (Taiyi) returns to its origin, emptiness is reclaimed to realize ultimate Dao.

Dao generates primordial Qi from emptiness; this Qi divides into yin-yang, which begets the Three Powers (heaven-earth-humanity) and all creation. Through cultivation, we now reunite the Five Phases, Four Symbols, and Three Powers to return to unified Qi—is this not the natural Dao? This embodies the dual cultivation of nature and life. With persistent practice, the spiritual elixir will spontaneously emerge from the Kunlun Summit (crown of the head).

When cultivating the Great Dao (Da Dao), swallowing the refined Golden Elixir (Jindan) that has been shed allows one to master the transformations of heaven and earth, reshape the physical body, and take complete control over life and death, no longer subject to celestial decree. This chapter follows the previous discussion of the "shedding the mortal form and entering the mouth" state, which truly verifies the successful completion of the Golden Elixir. The so-called "entering the mouth and descending to the abdomen" may appear as two steps, but in reality they are two aspects of one process. However, it's essential to understand that the "mouth" here does not refer to the physical mouth for eating, nor does the "abdomen" indicate the lower belly below the navel—only through guidance from a genuine master can one comprehend these profound mysteries.

The path of cultivation contains both ease and difficulty, requiring both personal effort and celestial机缘 (opportunity). Without accumulating hidden virtue (Yin De) and good deeds, one will inevitably attract various demonic obstructions. This chapter emphasizes that cultivators must resonate with the heavenly Dao (Tiandao) through moral cultivation. Although controlling one's destiny becomes possible after the Golden Elixir enters the body, this applies only to accomplished practitioners. For beginners, there exists a distinction between easy and difficult approaches: cultivation becomes simple when pursued with sincere intent, but turns arduous when forced through opportunistic means. Only by maintaining pure original mind can one communicate with the celestial will; the slightest hypocrisy will sever this connection and invite demonic interference. Thus, while transforming destiny depends on oneself, the opportunity to attain the Dao ultimately relies on heaven's will—making the accumulation of hidden virtue crucial.

Hidden virtue refers to performing good deeds secretly without seeking recognition, like the compassionate acts of universal benefit recorded in the Treatise on Response and Retribution (Taishang Ganying Pian), which cultivators should constantly practice. Such deeds must stem from genuine intention, free from utilitarian motives. Any trace of selfish desire for blessings contaminates the celestial will and leads one astray into demonic paths that obstruct cultivation. In truth, all demonic obstructions originate from within the mind—sincere accumulation of virtue naturally resonates with heaven and earth. The essence of Dao cultivation always lies in one's own heart, from beginning to end. Those who aspire to cultivate should deeply contemplate this principle.

When distracting thoughts are completely pacified and three thousand virtuous deeds align with the heavenly Dao, the alchemical cauldron (Dinglu) will naturally manifest to subdue the dragon and tiger (symbolizing the harmonization of Yin-Yang energies within the body). Why then cling to mundane familial attachments? This chapter elucidates the ultimate state of purified mind-nature. As mentioned earlier, cultivation requires accumulating merit...

Cultivation requires the accumulation of virtuous deeds (De) to align one's actions with the will of heaven. While scriptures mention "eight hundred meritorious deeds and three thousand virtuous acts" that might seem to require multiple lifetimes to complete, the true key lies in transforming one's state of mind. If one can relinquish attachments in a single thought, maintaining a state of luminous clarity within, then all merits and cultivation can be instantly perfected, reaching the supreme state of unity with the cosmos.

The "true emptiness" (ultimate voidness) spoken of here contains within it "marvelous existence" (mysterious reality). Practitioners must both penetrate the nature of emptiness and engage in diligent cultivation. Those who pursue only the theory of emptiness while denying cause and effect, believing they can attain the highest truth without practice, will instead invite misfortune. Truly wise cultivators, even after sudden realization of emptiness, continue to refine the Golden Elixir (Neidan, the internal alchemical practice of regulating breath, intention, and the refinement of Jing, Qi, and Shen) with steadfast dedication, never abandoning practical cultivation while abiding in emptiness.

When cultivation reaches a certain level, one realizes that "emptiness" and "existence" are fundamentally one. At this stage, all distinctions dissolve—mountains, rivers, and the earth itself appear as illusions, and even one's own body is no longer regarded as belonging to the self, let alone external possessions like land, spouses, or children. What worldly people desperately cling to is precisely what cultivators must let go of. This letting go is not forced but arises naturally from realization.

True cultivation begins with "existence" (concrete methods of practice) and culminates in "non-existence" (the realm of emptiness). Like fire merging with fire and emptiness uniting with emptiness, even the concept of "oneness" ultimately vanishes, not to mention any sense of separation. The Patriarchs ultimately clarify: The path of the Golden Elixir (Jindan) begins with deliberate practice (youzuo, "action") and ultimately arrives at the state of Wuwei ("non-action"). Ordinary people only see the lofty subtlety of Wuwei but fail to recognize that concrete practice is its foundation.

This passage discusses the supreme state of "harmonizing emptiness and existence" in cultivation, emphasizing the equal importance of practical cultivation and insight while rejecting empty theorizing. Internal alchemy (Neidan) must begin with specific methods before ultimately reaching the undifferentiated state of perfect fulfillment.

This scripture primarily addresses the relationship between "action" (youwei) and "non-action" (wuwei) in spiritual cultivation. Ordinary practitioners only recognize that "action" can accomplish life cultivation (refining the physical body), while "non-action" perfects nature cultivation (refining the mind and heart), yet they fail to grasp the proper sequence and priorities between these two approaches.

The work of "action" lies in forming the Golden Elixir (neidan practice), encompassing concrete methods such as gathering medicinal Qi and inner refinement, all of which require precise timing and adaptability. This practice demands severing external distractions and focusing single-mindedly, working diligently day and night—only the practitioner truly knows its bittersweet challenges, while outsiders remain oblivious. When the practice matures, the body becomes harmoniously regulated, all phenomena align in unity, and body-mind integration returns to the primordial source. Then, naturally, one attains the state of serene non-action. At this stage, inner virtue (De) manifests visibly, radiating brilliance that becomes perceptible to all. Hence the saying: "At the beginning of action, none know it; at the attainment of non-action, all recognize it." This dispels worldly attachment to the bias of "existence."

When genuine non-action is achieved, both form and spirit reach wondrous states, merging completely with the Dao. One attains both self-awakening and the ability to awaken others, widely transmitting profound teachings that inspire heartfelt conviction. Yet it must be understood that initially, one must practice with companions and concentrate on refinement to establish the foundation of elixir cultivation. The work of "action" requires sustained focus. Thus it's said: "Most only know non-action's marvel—who realizes action forms the foundation?" This dispels worldly attachment to the bias of "emptiness."

"Action" emphasizes life cultivation, while "non-action" focuses on nature cultivation. Daoist practitioners who overemphasize "action" risk becoming trapped in illusions, while those overemphasizing "non-action" may fall into stagnant emptiness. The Wuzhen Pian (Awakening to Reality) specifically counters these two extremes, guiding practitioners to achieve body-mind unity where existence and non-existence become inseparable, ultimately realizing the supreme true Dao.

The teaching concludes with the principle of "blending with the mundane while preserving one's light" (hun su he guang), illustrating how cultivators should live harmoniously in society—round when roundness is needed, square when squareness is required—their hidden and manifest states alternating unpredictably, leaving no visible traces of practice. This represents the wondrous function transcending conventional norms, as described in the Daode Jing: "Harmonizing the light and merging with the dust"—manifesting virtue without ostentatiously displaying it.

This scripture describes the state attained at advanced stages of cultivation and reveals the mysteries of Golden Elixir (Jindan) practice.

Those who have achieved mastery in cultivation appear no different from ordinary people outwardly. They move harmoniously with worldly affairs, maintaining inner purity while actively engaging in the world to guide others. Their actions flow freely—circular or square, manifest or hidden—so unpredictably that even heaven, earth, and spirits cannot discern their movements. This state resembles King Wen's interpretation of the "Use Nine" line in the Qian hexagram, revealing a leaderless pattern, or Confucius' admiration for Laozi's dragon-like transformations beyond comprehension.

The subsequent five-character verse expounds the essential formula for Golden Elixir cultivation. "The maiden in azure robes" symbolizes the wood nature within the fire trigram Li (heaven's three generates wood, earth's eight completes it), while "the youth cloaked in white" represents the metal nature within the water trigram Kan (earth's four generates metal, heaven's nine completes it). These two primordial energies (Qi) are most precious when their forms remain unmanifested—once materialized, they lose efficacy. The Golden Elixir medicine reaches its profoundest mystery at the threshold between potential and actualization. Practitioners must discern the firing times (huohou) within the twilight state of indistinct clarity, awaiting the emergence of true yang to achieve completion.

This passage summarizes the core principle of Golden Elixir cultivation: harmonizing yin-yang energies (metal-wood, water-fire) and seizing the mysterious moment when primordial Qi stirs. Practitioners must cultivate both transcendence (purity beyond form) and worldly engagement (guiding sentient beings), ultimately attaining a state of unimpeded freedom.

This scripture reveals the essential formula for cultivating the Golden Elixir (Jindan). When the vital impulse stirs within the body yet remains not fully detached from stillness, when yang energy first emerges while still containing yin softness—this ambiguous state between motion and stillness, neither fully tranquil nor actively moving, can tentatively be described as "profound darkness" (yaoming) and "indistinct clarity" (huanghu). Precisely within this subtle condition, in the fleeting moment where movement and stillness generate each other and yin-yang transforms, lies the most exquisite mystery of creation encompassing heaven, earth, and humanity.

At this critical juncture, practitioners must master the "fire timing" (huohou, regulating breath and intention) to accomplish the "heart-cleansing bath" (purifying body and mind) within an extremely brief instant, thereby obtaining the "true seed" of the Golden Elixir—the fundamental basis of cultivation. It resembles the sudden flash where the true human's divine form manifests within flames. This constitutes the foundational practice of Golden Elixir cultivation; advancing further leads to the realm of transcending physical form and breaking free from the cycle of rebirth, ultimately attaining the same dharma body as the Three Pure Ones (Sanqing, the highest Daoist deities).

The latter section explains the principles of internal and external elixir cultivation: internal medicine (one's vital essence, qi, and spirit) and external medicine (heaven-earth spiritual energy) share the same essence and both require harmonization. Within the body exists true fire (primordial qi), like flames perpetually burning within a furnace, while the external furnace (cultivation environment) demands diligent regulation. This integrated approach of internal-external cultivation produces the wondrous "true seed"—the foundation of the Golden Elixir.

Through eighty chapters, author Zhang Boduan systematically presents a complete cultivation system from foundational to supreme stages, moving from expansive principles to essential truths. Commentaries note that while every word in this scripture shines like pearls, its profundities must be personally realized by practitioners—as flawless as the Weaver Maid's celestial robes woven from clouds. The text concludes with twelve "Moon Over West River" lyric poems, using the imagery of "west" (metal), "river" (water), and "moon" (elixir) to symbolize the essential secrets of Golden Elixir cultivation.

This passage explains the distinction and connection between "internal medicine" (neiyao) and "external medicine" (waiyao) in Daoist Neidan (internal alchemy) practice. The so-called innate external medicine requires returning to the primordial state through acquired cultivation. Internal medicine refers to the inherent nature one possesses from birth, needing no cultivation; external medicine involves the conscious practice of returning to the source through disciplined effort.

Internal medicine pertains to the essence of nature and life, located in the Central Yellow (zhonghuang, referring to the central Dantian region of the body). It is the process by which the original spirit (yuanshen, innate consciousness) governs Jing (essence) and Qi (vital energy). External medicine, on the other hand, relates to the application of life, manifesting in the harmonization of Kan (Water, representing the kidneys) and Li (Fire, representing the heart)—the interplay of Yin and Yang. This is achieved through the unity of body and mind, merging with true intention (zhenyi, pure and undistracted awareness).

The original spirit is inherently still and unmoving, yet capable of responding to all things. This stillness and responsiveness are two sides of the same coin: in stillness, there is no arising of distracting thoughts, embodying Wuwei (non-action); in responsiveness, the six senses (eyes, ears, nose, tongue, body, and mind) interact without obstructing action. Thus, internal and external medicines are fundamentally interconnected, requiring inner and outer integration. The innate spark of spiritual light, perfectly unobstructed, is the foundation of alchemical refinement.

Those of superior capacity understand this principle—they need only maintain undistracted true intention and inwardly gathered original spirit, allowing body and mind to naturally harmonize and merge. This is the method of dual cultivation, connecting the source with its manifestations. Those of middling or lesser capacity find it difficult to directly attain this state and must first refine themselves and establish a foundation (lianji zhuji), much like building strong walls. They begin by harmonizing body and mind to consolidate the original spirit—an external practice that supports internal cultivation, retracing the path from manifestations back to the source. Both approaches ultimately lead to the same destination.

Just as medicines are divided into internal and external, so too are the furnace and cauldron (luding, the sites of refinement): the internal furnace resides in the Central Yellow region, while the external furnace involves the six senses. Similarly, fire management (huohou, the regulation of refining "heat") has inner and outer aspects: inner fire management emphasizes Wuwei, while outer fire management includes intentional effort. Practitioners must let the original spirit dwell peacefully in the Central Yellow, maintaining balanced movement and stillness, allowing natural, unhurried breathing to embrace the original spirit without separation—like an unextinguished flame in the furnace, day and night. This is the innate state of the internal furnace, internal medicine, and inner fire management—a primordial realm of neither increase nor decrease.

All acquired practices of augmentation and reduction arise from this foundation. Ordinary people lose their true nature (zhenxing) largely because the six senses chase after external things. Therefore, external furnace practice is necessary to rein in the senses, using the discipline of outer fire management to nurture and replenish the internal medicine.

Maintain constant awareness throughout the twenty-four hours of the day, perpetually turning inward in self-reflection while diligently cultivating body and mind. On the Daoist path, one must continuously accumulate knowledge while simultaneously reducing attachments and delusions. Cultivation efforts should progress unceasingly, yet grasping at the original mind must be continuously released. This dual process of addition and subtraction continues until reaching a state beyond increase or decrease, where primordial Jing (essence) naturally transforms into primordial Qi (vital energy), Qi then refines into primordial Shen (spirit), ultimately returning to the Great Void (cosmic origin).

The method of addition and subtraction still belongs to the realm of conditioned practice (youwei). Only upon reaching the state of neither increase nor decrease does one truly attain the wondrous Dao of non-action (wuwei). The conditioned cultivation serves precisely to align with the unconditioned essence. This reveals how the two approaches—external furnace (postnatal cultivation) and internal furnace (prenatal nature)—though differing in form, share the same fundamental principle.

The internal furnace refers to the Central Yellow Divine Chamber (seat of primordial awareness), where the unmoving primordial Shen functions as internal medicine—the natural true fire and internal firing process belonging to the essential nature, primarily cultivating spiritual attainment (xinggong). The external furnace involves harmonizing Kan and Li (yin-yang of body and mind) through diligent practice using addition-subtraction methods—the work of external medicine belonging to conditioned practice, primarily cultivating vital attainment (minggong). When internal and external practices merge into unity through dual cultivation of nature and life (xingming shuangxiu), one achieves the marvelous state where form and spirit both transcend.

This cultivation method is supremely sacred—the only concern being whether practitioners possess sufficient foundation to bear it. By properly harmonizing lead and mercury (body-mind yin-yang), one quickly perceives the embryonic form of the Mysterious Pearl (Golden Elixir). Dedicated practitioners can achieve realization even amid worldly life. The practice is fundamentally simple, the elixir never distant—when explained plainly, it may even appear laughably obvious.

This chapter reveals the supremely simple principle of the Golden Elixir's great medicine, whose essence lies in using the internal to encompass the external. Though internal and external practices complement each other in achieving the elixir, they differ fundamentally: external medicine belongs to postnatal conditioned practice requiring diligent effort, while internal medicine is the prenatal unconditioned essence—perfect and complete in the present moment. The crucial ingredients are simply true lead and true mercury (body and mind), while the true challenge lies in harmonizing them with true intention (primordial awareness). When intention settles into stillness, primordial Shen naturally manifests, body and mind spontaneously unite, and the Golden Elixir naturally accomplishes itself.

The profound mystery of cultivating the Golden Elixir (Jindan) actually lies in the present moment, with its divine efficacy verifiable immediately—it absolutely doesn't require long, arduous years. The so-called radiant Golden Elixir can in fact be achieved within a single day. Unfortunately, most people in the world cannot believe this. They often torment their bodies, abandon their wives and children, and retreat to remote mountains, thinking this is true cultivation. They fail to realize that genuine cultivation lies entirely in the refinement of one's nature and mind—as long as the heart remains pure and clear, untainted and unobscured by external things, then even living in a bustling marketplace is no different from seclusion in the mountains. This is the principle that "the greatest seclusion is within the city," the true path of cultivation.

The very words "body and mind" (shenxin) themselves constitute the Great Medicine (the foundation of cultivation), and the innate spark of the Original Spirit (Yuanshen, the inherent spiritual awareness) is the catalyst for this Great Medicine. This "elixir seed" (the starting point of cultivation) is possessed by everyone—it's just that without encountering an enlightened master to reveal it, people remain unaware in their daily lives. In truth, the Great Medicine is closest to us, and the method is the simplest, yet people insist on seeking it in complexity and difficulty, missing it right before their eyes and resigning themselves to being ordinary. Once awakened, they realize: what everyone inherently possesses is precisely the Golden Elixir and Great Medicine; what they unknowingly use daily is the Natural True Fire (innate energy); and what they took for granted as ordinary is precisely what can elevate them to sagehood. How can those who grasp this not laugh at themselves? As Laozi said, "If the Dao were not laughed at, it would not be the Dao."

This passage explains how internal cultivation governs external practice, directly realizing the state of Wuwei (non-action)—the cultivation of life (minggong) is naturally completed in the process of illuminating the mind and realizing one's true nature (xinggong). This is the profound principle that "cultivating the upper gate (nature) naturally encompasses the lower two gates (life)."

The following explains the specific method of cultivation: The "First Scripture of the White Tiger" (referring to the innate Original Essence (Yuanjing) contained in the kidney water) is the supreme treasure, and the "Divine Water" (saliva) of the "Jade Pool" (the mouth) contains True Gold (innate Qi). It must be understood that the highest source of cultivation lies deep within the body—it is by no means comparable to ordinary medicines. To refine the Ninefold Golden Elixir (the highest state), one must first subdue the deluded mind and maintain correct awareness. The "medicine" (essence and Qi) must be gathered at specific times, stabilizing the rise and fall of Qi, and during the "application of fire" (refining essence and Qi), one must be especially cautious of danger.

This section explains that the cultivation of life (minggong) requires active methods (youwei, deliberate practice) to complement the cultivation of nature (xinggong)—internal cultivation of nature through Wuwei, and external cultivation of life through youwei. Cultivating nature is about grasping the root and governing the whole, its mechanism being extremely simple; cultivating life is about returning to the source through specific methods, its function being extremely subtle. The refinement of the Golden Elixir begins with the "harmonization of the Four Symbols": The White Tiger of the West corresponds to the Metal of the lungs and contains the True Water of Heaven (innate kidney essence), called the "First Scripture," the treasure of utmost Yang. The Azure Dragon of the East corresponds to the Wood of the liver, forming the Jade Pool, which contains the True Fire of Earth (innate heart fire), its essence called "Divine Water," the most authentic Gold.

This scripture elucidates the essential techniques of "Kan-Li copulation" and "herbal gathering" in Daoist Neidan (internal alchemy) practice.

The terms "divine water of Hua Pool" and "true gold" refer to refined substances within the human body. Though the four manifestations (metal, wood, water, fire) appear distinct, they ultimately reduce to just Kan (water) and Li (fire). When these two elements reverse their natural course, they coalesce into "primordial Qi" (the most fundamental life energy), which originates from the void and remains utterly pure.

The yin line in the Li trigram represents "self-earth," symbolizing the restless human mind that requires purification through practice. The yang line in the Kan trigram signifies "cosmic-earth," representing the subtle Dao-mind that must be carefully preserved. Practitioners must persistently cultivate "self-refinement and mind-stabilization" until reaching profound stillness, where the "great medicine" (refined vital essence) emerges. The critical moment for gathering occurs precisely when Kan and Li first interact and yang energy stirs—like the sun's first rays appearing beneath a pond's surface.

During herbal gathering, one must maintain mental stillness like observing sprouts breaking through soil, seizing the exact moment to collect with focused intention and "apply fire" (direct energy through will). Timing proves crucial: premature gathering yields unripe medicine, while delayed action collects spent essence—a hair's breadth deviation spells complete failure.

The subsequent references to "sevenfold-returning cinnabar" and "ninefold-reverted golden fluid" describe the cyclical refinement of essence within the body. True practice transcends temporal calculations (tiger-hour, rat-hour etc.), focusing instead on mastering Five Phase dynamics. All transformations stem from the singular "mercury" (vital essence) circulating through the body—when yin and yang reach fullness, mystical realization naturally occurs, with the "mysterious feminine" (Dantian) serving as the pivotal locus.

A special note clarifies the contextual meanings of "floating-sinking": the upper scroll describes Kan-Li interaction states, while here it denotes fire application during herbal gathering. This chapter reveals how concrete methods (external medicine) lead back to primordial states (internal medicine), achieving both life cultivation (physical refinement) and nature cultivation (spiritual realization)—a progressive ascent from lower to upper Dantian.

This passage explains the core principle of "seven returns and nine restorations" (qifan jiuhuan) in Daoist Neidan (internal alchemy) practice. The key lies in the interplay between the "mysterious female" (xuánpìn, referring to the Dantian or energy center) and "external medicine" (innate primordial Qi), focusing on the mutual transformation of Yin and Yang energies.

The profundity of seven returns and nine restorations originates from the symbolic numerology of the Hetu and Luoshu (ancient mystical diagrams): Heaven generates water as number one, Earth completes it as six—thus the trigram Kan (representing water) bears the number seven, secretly containing fire's nature. Earth generates fire as two, Heaven completes it as seven—thus the trigram Li (representing fire) bears the number nine, inherently holding metal's essence. Practitioners must extract true Yin from the Li trigram (heart fire) to return it to the Kan palace (kidney water), while drawing true Yang from Kan to restore it to Li, thereby recovering the primordial pure Yang body.

The concrete cultivation process involves: first transforming northern kidney water into southern heart fire ("seven returns of cinnabar"), then refining heart fire into western lung metal ("nine restorations of golden fluid"), ultimately forging the pure Yang Golden Elixir. This mirrors the transformation from Hetu to Luoshu, where metal and fire exchange positions, converting the innate to the manifest. Ordinary people mistakenly interpret seven returns and nine restorations through the twelve earthly branches, when in truth one should follow the natural sequence of Five Phase (Wood, Fire, Earth, Metal, Water) mutual generation.

Though the true elixir (genuine lead) appears divided between Kan and Li trigrams, it fundamentally remains one primordial Qi. Initially residing as water (true lead) in the northern Kan palace, it sequentially transforms into southern fire (cinnabar), eastern wood (mercury), western metal (silver), and central earth, completing the Five Phase cycle. Throughout this process, the single Yang line within Kan (primordial Qi) remains the root—as the source of both nature and life, it encompasses all potential transformations of the Five Phases.

This scripture primarily elucidates the principle of transformation through the interaction of Yin and Yang energies (Yin-Yang) in Daoist Neidan (internal alchemy) practice. It mentions "mercury" (a metaphor for primordial Qi) circulating within the body—when flowing naturally, it generates life, while reverse cultivation enables return to one's original state. Through the practice of "sevenfold return and ninefold refinement" (a Neidan term denoting the cyclical refinement process of Jing (essence) and Qi within the body), one ultimately attains the state of "perfect embryonic completion and Qi abundance" (the consummate stage of Neidan achievement), aligning with the cosmic rhythms of heaven and earth.

The crux of cultivation lies in mastering the "mysterious gate" (Xuanpin, the fundamental point of Yin-Yang interaction). Initially, the "valley spirit" (Gushen, the primordial Shen/spirit) differentiates into Yin and Yang energies that circulate outward; during practice, these energies must reunite and return to the original spirit. This resembles the Cowherd and Weaver Girl meeting via magpie bridge, the tortoise and snake merging to form the Black Tortoise (northern celestial creature), or the sun and moon conjoining during lunar phases—Yin and Yang energies must harmoniously coordinate their movements.

Should Yin and Yang become isolated—as symbolized by the "Pi hexagram" (Heaven and Earth not interacting) in the Book of Changes—cultivation fails. Only when these energies intermingle eternally like heaven and earth can the supreme state of Neidan be realized. Beginning from its third chapter, this text systematically expounds key cultivation methods, emphasizing the synergy between internal and external elixirs (refining Jing-Qi-Shen internally and the Golden Elixir externally), along with the vital importance of mind regulation and self-refinement.

This passage elucidates the core principles of Neidan (internal alchemy) practice. It begins by emphasizing that cultivating only one's nature (spiritual refinement) while neglecting life (physical cultivation) is incomplete—true attainment requires the dual cultivation of nature and life (xingming shuangxiu) to return to one's original state. Some practitioners mistakenly interpret the union of Yin-Yang as sexual techniques, which represents a grave misinterpretation.

Authentic practice involves harmonizing the body's Yin and Yang Qi. Lead (representing true Yang within kidney water) must unite with mercury (symbolizing true Yin within heart fire), just as ruler and minister complement each other. Metal (lungs) and Wood (liver), though naturally opposing in the Five Phases (Wuxing), require true Earth (spleen) as mediator—when Metal's firmness encounters Wood's pliancy, Earth's harmonizing influence transforms conflict into mutual attraction. This dynamic mirrors the symbolic union of the tiger (Metal) and dragon (Wood), ultimately forming the sacred embryo in the Dantian (energy center)—metaphorically described as "a man becoming pregnant."

The practical method unfolds as follows: The maiden (Yin) and youth (Yang) represent the body's opposing Qi currents. Wood's fluid (liver Qi) and Metal's essence (lung Qi) require Earth's mediation to achieve triune unity. Through regulated breathing (referred to as "Ding Gong's method"), Yin and Yang Qi unite like husband and wife. The practitioner then employs internal Qi circulation (the "River Chariot") to elevate refined essence to the crown (the "Peak of Kunlun"), completing an alchemical cycle.

The crux lies in using the central palace (spleen Earth) to harmonize heart-lung Qi, guiding internal energy through specific breathing techniques until Yin and Yang naturally fuse into the Golden Elixir. Throughout this process, breath regulation and Qi circulation remain paramount.

This passage explains several key stages and fire regulation techniques in Daoist Neidan (internal alchemy) practice.

It begins by describing how the foundation for Golden Elixir cultivation has been established, though formal refinement hasn't yet commenced. The text introduces the concept of "three families meeting" (the union of Jing, Qi, and Shen): the "sixteen-year-old maiden" (wood liquid, representing liver Qi) and the "twenty-seven-year-old youth" (gold essence, representing lung Qi) are initially separate, requiring the "true yellow earth" (spleen earth Qi) as mediator for harmonization. This process is termed "chasing the two Qi along the yellow path, uniting the three natures in the primordial palace" (guiding yin-yang energies through the central channel to converge essence, energy and spirit in the Dantian).

When metal (lung Qi) and wood (liver Qi) interact, gentle fire (wenhuo) must be applied for gradual nurturing, allowing natural fusion. This produces the "great medicine" (essence of internal alchemy). Upon its emergence comes the "living zi hour" (optimal moment for energy activation), when practitioners must promptly gather "true lead" (primordial Qi) into the "earthen cauldron" (lower Dantian) for continued gentle cultivation.

After sufficient nurturing, the "true zi hour" (actual alchemical moment) arrives, initiating the "waterwheel" (energy circulation). Starting from the coccyx, the fire passes through the spinal ridge and occiput to reach the crown, now requiring strong fire (wuhuo) for intense refinement. Following "heaven-earth intercourse" (yin-yang union), the essence descends into the "yellow courtyard" (middle Dantian), where the great medicine begins coagulating in the cauldron - this constitutes the "golden fluid returning elixir" process.

After the elixir enters the cauldron, practitioners continue "nursing and warming" until the "sacred embryo" (internal elixir) matures and the "true being" (original spirit) manifests, completing the "ninefold cyclical refinement."

The text then compares cosmic yin-yang transformations to alternating "pi and tai" hexagrams (from the Book of Changes), emphasizing the practitioner's need to discern the proper timing represented by "zhun and meng" hexagrams (symbolizing beginnings and cultivation). Water-fire interaction resembles spokes converging at a hub or rivers returning to the sea, with the crucial factor being "addition and subtraction" (fire regulation). Attaining the "One" (Dao) makes all preparations complete, rendering directional distinctions unnecessary. Practitioners must continually reduce distractions and practice diligently, never treating this "treasure of life" carelessly.

The concluding section summarizes how the elixir refinement (transforming essence into energy) progresses from "being" to "non-being." The earlier described waterwheel circulation culminates in the great heaven-earth exchange, mirroring the transformation from pi (heaven above earth) to tai (earth above heaven) hexagrams. Fire regulation requires meticulous timing: advancing fire during yang activation resembles the zhun hexagram (symbolizing creation), while withdrawing fire during yin stillness parallels the meng hexagram (representing cultivation). These two hexagrams reveal the sixty-four hexagrams' yin-yang dynamics. After completing heaven-earth intercourse, the primordial seed descends into the yellow courtyard, uniting prenatal and postnatal energies.

The true Qi within the body naturally converges at the Gate of Life (Dantian), much like thirty spokes unite at the hub of a wheel, or countless rivers ultimately flow into the ocean. Yet this requires constant adjustment of Yin-Yang balance ("extracting lead and replenishing mercury" refers to regulating water and fire), refining Yin Qi back to pure Yang state—the crux lies in mastering the firing time (referring to mental control and timing during practice). Thus, the convergence of true Qi resembles spokes gathering at the hub or rivers returning to the sea, with its profundity rooted in the skillful application of Yin-Yang regulation.

In early cultivation stages, Metal (lungs) and Wood (liver) conflict, while Fire (heart) and Water (kidneys) remain uncoordinated, causing the body's energy to scatter. Upon reaching a certain stage of attainment, these energies fuse into one, with the original spirit (Shen, humanity's innate consciousness) dwelling peacefully in the middle Dantian (the chest cavity), transcendent and independent. At this point, energies throughout the body become seamlessly unified, achieving the "attainment of Oneness" (referring to the harmonious state of Yin-Yang), where all conditions are perfected. Hence the saying: "Attaining Oneness makes all things complete," rendering directional distinctions unnecessary.

Having reached this stage, practitioners should progressively reduce artificial interventions, maintaining the state of "embracing Oneness and guarding the center" (focusing on preserving the Dantian), where movement and stillness occur naturally. Transitioning from purposeful cultivation methods to the Wuwei (non-action) realm resembles Laozi's teaching of "diminishing and diminishing again" (continuously eliminating distractions) until complete non-action is achieved. Previous cultivation served to stabilize the life foundation (physical basis); once consolidated, one must contemplate the nature of mind to realize higher states. Clinging to foundational cultivation is like refusing to abandon the raft after reaching shore—even with extended lifespan, one remains an ordinary mortal.

At winter solstice, Yang Qi begins its rebirth (Fu hexagram), with one Yang line increasing each month until the fifth month (Gou hexagram) when Yin Qi emerges. Practitioners must comprehend the timing of Yin-Yang waxing and waning—just as Yang Qi arises at midnight (Zi hour) and Yin Qi begins at noon (Wu hour) each day. This borrows the I Ching's hexagrams to illustrate the principles of firing time, though the true mystery transcends verbal explanation. The essence can only be hinted through the cyclical transformations of years, months, days and hours—fundamentally, it's about discerning the timing of Yin-Yang movement and stillness.

This passage reveals the mysteries of "fire timing" (the rhythm and opportune moments in cultivation) within Daoist Neidan (internal alchemy) practice. The annual cycle of Yang energy unfolds as follows: In the second lunar month, four Yang lines appear (represented by the Tai hexagram); by the third month, five Yang lines emerge (Dazhuang hexagram), culminating in the fourth month with the six pure Yang lines of the Qian hexagram—marking the peak of Yang energy before its transition into Yin. The fifth month introduces the first Yin line (Gou hexagram), with each subsequent month adding another Yin line until the tenth month forms the pure Yin Kun hexagram, where Yin reaches its zenith before cycling back to Yang.

Ancient sages, concerned that practitioners might fixate solely on annual cycles, compressed this yearly fire timing into a monthly framework: The new moon's first sliver corresponds to the Fu hexagram (single Yang line), the waxing half-moon to the Dui hexagram (two Yang lines), and the full moon to the three-Yang Qian hexagram. As the moon wanes, the first Yin line appears (Gou hexagram), the waning half-moon aligns with the Gen hexagram (two Yin lines), and the moonless end of the month mirrors the three-Yin Kun hexagram.

To further prevent attachment to monthly cycles, this rhythm was condensed into a single day: Zi hour (11 PM–1 AM) embodies the Fu hexagram’s initial Yang, progressing to the six-Yang Qian hexagram by Si hour (9–11 AM). At Wu hour (11 AM–1 PM), the first Yin line emerges (Gou hexagram), culminating in the six-Yin Kun hexagram by Hai hour (9–11 PM). Thus, a single day encapsulates the moon’s phases and the year’s seasonal shifts. The Golden Elixir (Jindan) practice adjusts its fire timing precisely according to these patterns of Yin-Yang movement and stillness.

Dawn’s stirring Yang resembles the winter solstice or new moon—a time to "advance the Yang fire"; dusk’s settling Yin mirrors the summer solstice or full moon—a moment to "retract the Yin tally" (gathering Yang energy). By unifying annual, monthly, and daily cycles into the hourly interplay of motion and stillness, the crux of alchemy lies in discerning the transitional moments of Yin and Yang. Most profound is the realization that true fire timing has no fixed schedule—it resides entirely in seizing nature’s subtlest, most imperceptible opportunities.

The text concludes by critiquing those who misunderstand the Five Phases (Wood, Fire, Earth, Metal, Water) and Four Symbols (lesser/greater Yin and Yang), or confuse alchemical terms like cinnabar, mercury, lead, and silver. Such individuals, despite lacking mastery over fire timing, proclaim themselves enlightened masters. Worse still, they propagate erroneous methods, leading practitioners astray—a deceitful and harmful practice utterly unworthy of the Dao.

This chapter exposes those blind teachers who remain ignorant of the Golden Elixir (Jindan) yet mislead others. The cultivation principles of the Golden Elixir originate from the Hetu (River Chart), an ancient mystical diagram where a central point governs the four directions. Water, fire, wood, and metal are arranged in the four directions to form the Four Symbols (Sixiang), which converge in the central earth phase—revealing the profound interplay of the Five Phases (Wuxing). This same principle exists within the human body, as every person is inherently complete. Following this pattern leads to the mundane cycle of birth, aging, illness, and death, while reversing it through cultivation leads to immortality and enlightenment.

The ancients, constrained by the secrecy of celestial truths, resorted to metaphors in their alchemical scriptures: some used bodily analogies like the conjugal union of Yin and Yang, while others employed external references like cinnabar and mercury—all symbolic representations. As for the true essence of cultivation—the "true medicine" and "true fire"—it can only be grasped through direct transmission from a genuine master. Today, some practitioners refuse to seek enlightened teachers and instead cultivate haphazardly, lacking even basic understanding of the Five Phases, Four Symbols, or the symbolic meanings of cinnabar, mercury, silver, and lead—let alone mastering the "fire times" (huohou, the precise control of timing and intention). Among these misguided paths: the lowest mistake physical metallurgy for true practice, even equating sexual union with cultivation; the middling merely circulate Qi (vital energy) and Jing (essence) within the body; the highest merely maintain a state of tranquil clarity, practicing solitary methods. It is pitiful that these blind practitioners refuse to acknowledge their errors, instead boasting about the Dao (the Way) and posing as masters before achieving true realization. The result is that they mislead their disciples, creating generations of followers who slander the true path and disparage genuine masters. Without encountering an enlightened teacher to correct them, they remain trapped in error, harming both themselves and others.

Here, the patriarch reveals the true meaning of the Golden Elixir, sternly condemning these blind teachers for the sake of future generations—an act of utmost compassion. The true wonder of the Golden Elixir lies in the mutual embrace of Yin within Yang and Yang within Yin (Yin-Yang intercontainment); only through their harmonious union can the spiritual medicine that transforms the soul be refined. Consuming this Golden Elixir is like a serpent becoming a dragon or a phoenix arising from a chicken—it leads directly to the supreme realm of pure Yang divinity.

(Note: Terms like "cinnabar, mercury, silver, and lead" originate from external alchemy (Waidan) but symbolize internal Yin-Yang energies in Neidan (internal alchemy). "Fire times" (huohou) refers to the precise control of intention and timing in cultivation. "Clear and serene" (chengcheng zhanzhan) describes the lucid, undisturbed state of consciousness during deep meditation.)

This chapter elucidates the Great Dao of the Golden Elixir (Jindan), the core practice of Daoist internal alchemy (Neidan), which enables transcendence of the mundane to attain sagehood. The essence of Golden Elixir cultivation lies in harmonizing the two fundamental elements: Kan (representing kidney-water) and Li (representing heart-fire).

The Li trigram (with a broken central line) embodies the True Fire of the Sun—yang in nature yet containing yin qualities, outwardly firm yet inwardly serene, corresponding to the heart's attributes. The Kan trigram (with an unbroken central line) embodies the True Water of the Moon—yin in nature yet harboring yang energy, outwardly yielding yet inwardly substantial, corresponding to the body's characteristics. When wood-nature arises from fire, it manifests as the yang soul (hun); when metal-nature emerges from water, it manifests as the yin po (po). The interaction of metal and wood is essentially the fusion of water and fire.

The soul and po discussed here are not ordinary concepts but spiritual essences residing in the primordial body and mind—the "heart" refers not to the physical organ but to the coalescence of primordial essence (Jing, the foundational energy of life); the "body" is not the flesh composed of earth, water, fire, and wind but the vessel formed by the flow of primordial qi (Qi, the cosmic vital breath). When this primordial body and mind perfectly unite, the primordial spirit (Shen, original spirituality) manifests. However, once humans descend into postnatal physical forms, the body becomes enslaved by sensory desires and the mind entangled by distracting thoughts, causing the loss of true nature and separation of hun and po, trapping them in the bitter sea of birth and death.

Practitioners should employ true intention (pure, undistracted awareness) as the medium to harmonize body and mind into unity. Only when body and mind become an undifferentiated whole, perfectly still and unmoving, can the Great Medicine of the Golden Elixir (the supreme achievement of internal alchemy) be fully realized. At this stage, the yang hun and yin po completely merge into the primordial spirit, attaining the realm of ultimate spirituality and sagehood. Obtaining this "true seed" (the nascent form of the Golden Elixir) transforms mundane physicality into primordial nature in an instant, transmuting the mortal body into a sacred Dao-body. All attachments and afflictions are immediately transcended, entering the eternal realm beyond birth and extinction.

Legend tells of serpents swallowing the Golden Elixir to become divine dragons, or chickens consuming it to transform into celestial phoenixes—likewise, practitioners naturally ascend to the sacred realm of True Yang, namely the Three Pure Realms (Sanqing) of Daoist cosmology: the Jade Pure, Upper Pure, and Great Pure realms, ultimately reaching the supreme, limitless Palace of the Great Canopy. In truth, these Three Pure Realms are not external locations but manifestations of the inherent unity of primordial essence (Jing), qi (Qi), and spirit (Shen) within the human body. The metaphors of serpents becoming dragons and chickens turning into phoenixes illustrate the alchemical principle of transmuting the mundane into the sacred—a profound mystery only fully comprehended through direct realization.

Finally, the text emphasizes the necessity of accumulating merit: one must cultivate eight hundred virtues (symbolizing perfection) and three thousand hidden virtues (unseen acts of goodness), attaining equanimity toward all beings without distinction between friend or foe, to fulfill the fundamental vow of immortals. At this stage, neither weapons nor wild beasts can harm them, nor can the cycles of birth and death bind them. When celestial talismans (fulu, credentials of attainment) descend from heaven, they may ride phoenix-drawn chariots to the Ninth Heaven to behold the Celestial Worthy.

This passage of scripture mainly discusses the relationship between cultivating the Dao (the Way) and cultivating De (Virtue/Power), as well as the breadth of mind and spiritual attainment of those who cultivate the Dao.

It first quotes the Doctrine of the Mean and the Zhouyi (Book of Changes) to explain that without lofty virtue, one cannot realize the supreme great Dao. Just as in the Zhouyi the Qian hexagram represents the heavenly Dao and the Kun hexagram represents De, if one lacks the character of a noble person who “with profound virtue bears all things,” how could one, like a sage, drive the six dragons and ascend into the heavens?

What matters most for those who cultivate the Dao is to arouse the power of great vows. One must first vow to universally liberate all sentient beings before one can ultimately attain perfect enlightenment. The saying “practice eight hundred merits and accumulate three thousand virtues” means putting this great vow into practice. The Diamond Sutra says that all dharmas are equal, with no distinction of high or low. People only know that Heaven and Earth are vast and the myriad things are tiny, but they do not know that Heaven and Earth share the same source with me and that the myriad things are one body with me. If one truly penetrates this principle, one will understand that all things are equal, without distinctions of close or distant, noble or base. This is precisely the original vow of immortals to save all sentient beings.

When merits and virtues are perfected, Dao and De naturally become lofty, and both body and spirit can reach a mysterious realm. At that time wild beasts cannot harm one, weapons cannot injure one, and impermanence and change cannot disturb one. One takes the “Valley Spirit” (referring to the empty and still original nature) as long life and takes the cool and pure realm as one’s dwelling place. Non-arising and non-ceasing is the true precious talisman; constant purity and stillness is the true heaven. By transcending the limitations of Hinayana Buddhism, one can ride the dragon carriages and phoenix coaches that symbolize the great Dao. In fact, the great Dao is inherently noble; there is no need to seek any other precious talisman or heaven.

Although for people of superior capacity it is enough to say that “Dao and De are noble,” those of middling and inferior capacity often find this hard to believe. Therefore the patriarchs, fearing that cultivators might fall into one-sided attachment, used images such as precious tables and rare imperial objects as expedient means of teaching.

A poem appended afterward (symbolizing an intercalary month) says: The Golden Elixir is the body’s supreme treasure; once refined, it can transform inexhaustibly. But more important is to seek the true meaning within mind-nature and to realize the wondrous function of non-arising and non-ceasing. One need not wait for a future life; in this very life one can attain Buddhist spiritual powers. Since the Dragon Girl (a Buddhist allusion) accomplished this method, few have been able to inherit it. This chapter discusses the dual cultivation of nature and life and attaining fruition in one lifetime; it is the summary of the Wuzhen pian (Awakening to Reality).

This passage discusses two key aspects of cultivating the Golden Elixir (Jindan) path: the "external medicine" (referring to Jing-essence and Qi) and the dual cultivation of nature and life (Xingming Shuangxiu). When these practices are perfected, one returns to the primordial origin, directly realizing one's true mind while simultaneously perfecting physical attainment.

The foundation of the Golden Elixir method lies in creating substantial existence from emptiness. Specifically, it involves gathering the powers of the Five Phases (Wood, Fire, Earth, Metal, Water), harmonizing the Four Symbols (Azure Dragon, White Tiger, Vermilion Bird, Black Tortoise), and unifying the Three Treasures (Jing-essence, Qi-energy, and Shen-spirit) to merge the dual forces of Yin and Yang into primordial Qi. Once refined, this becomes indestructible. Through nine cyclical transformations, one attains the ability to traverse heaven and earth, penetrating both the manifest and hidden realms. The Golden Elixir truly represents the supreme method of physical cultivation—when perfected, it yields infinite transformations, as Guan Yinzi (a Daoist figure) described: "Perceive the spirit and attain enduring life."

Though the Golden Elixir enables myriad transformations, it still operates within the cycle of birth and death. One must go further to fully awaken to one's true nature and realize the patience of non-arising (a state transcending life and death). At this stage, mountains, rivers, and the entire earth are seen as manifestations of the Dharma body, and all time collapses into a single breath. What need is there then to cling to magical powers or treasures? This is what Guan Yinzi meant by "Forget the spirit and transcend life."

Unfortunately, practitioners of lesser capacity cannot suddenly awaken to their innate Buddha-nature (Vairocana's enlightenment) and often require countless eons of cultivation. How different are those with great resolve who directly realize non-arising—once awakened, they immediately attain perfect understanding, fully embodying the three bodies (Dharma body, Reward body, and Transformation body) and the six supernatural powers. A single lifetime of practice can achieve what normally requires eons, placing them instantly among the ranks of Buddhas. Examples abound: the butcher in the Nirvana Sutra who laid down his knife and attained enlightenment; Sudhana in the Avatamsaka Sutra who visited spiritual mentors to enter Maitreya's tower; or the dragon girl in the Lotus Sutra who offered her pearl and transformed from female to male—all demonstrating enlightenment within this very life.

Particularly regarding the dragon girl's story, Elder Li's commentary in the Huayan Helun explains this as symbolic teaching (using narrative to convey doctrine). If we analogize this to Golden Elixir cultivation, the underlying principles are identical. The patriarchs specifically emphasized these examples in scriptures precisely to inspire practitioners to realize this truth in the present moment.

This passage elucidates the core principles of Daoist Neidan (internal alchemy) practice, using symbolic language to reveal the essential method of dual cultivation of nature and life (xingming shuangxiu).

The text employs the典故 of "Dragon Maiden Offering the Jewel" (from the Lotus Sutra) as a metaphor for the alchemical process: the yang energy within the Kan trigram (representing kidney water) is likened to the dragon maiden (symbolizing yang within yin). The eight-year-old dragon maiden represents the "two eights equilibrium" (the balanced numerical ratio of yin and yang), while the jewel symbolizes the precious prenatal qi (metal within water). Presenting the jewel to the Buddha (Qian trigram) signifies transforming yin energy into pure yang—akin to a maiden transforming into a male body—symbolizing the qualitative shift where the Li trigram (heart fire) returns to the Qian trigram (pure yang).

The southern direction represents the postnatal position of the Li trigram but also the prenatal orientation of the Qian trigram. When the jewel (qi) ascends, the metal nature (original innate nature) returns to its source. After refining away the turbid yin dross, the physical body can become a supreme treasure, and enlightenment manifests wondrous functions. Once the postnatal Li trigram transforms into the prenatal Qian trigram, its essence becomes firm and upright, functioning to harmonize nature and life, adapting flexibly to changes, ultimately attaining the stainless state (a pure, undefiled awakened condition).

This passage serves both as the culmination of the Wuzhen Pian (Awakening to Reality) and encapsulates the essential meaning of all alchemical scriptures, resonating with classics like the Zhouyi (Book of Changes) and Daode Jing (Tao Te Ching). The five concluding quatrains correspond to the Five Phases (Wood, Fire, Earth, Metal, Water), emphasizing that mere insight into one's nature (understanding xing) is insufficient—it must be complemented by life cultivation practices (perfecting ming). Though all beings inherently possess the Buddha-nature, ordinary people remain obscured by the five aggregates (form, sensation, perception, volition, consciousness) and require practical cultivation to transform habitual tendencies. Throughout history, realized masters continued deep practice even after attaining insight to genuinely realize the Dao.

The crucial point is this: cultivation of nature (xinggong, mental refinement) and cultivation of life (minggong, bodily practice) must be pursued together. While understanding can be sudden (immediate realization of principle), practice must be gradual (progressive refinement through effort). Only through actual cultivation that transforms body and mind can one attain the Golden Elixir (jindan) path where nature and life unite as one.

This scripture primarily addresses crucial issues in spiritual cultivation. The main points are:

If one can completely eradicate all habitual tendencies (deeply ingrained patterns of thought and behavior), attaining spiritual fruition is not difficult—one can immediately obtain the divine powers of a Buddha or Bodhisattva. However, if cultivation focuses solely on abandoning the physical body to pursue mental refinement, seeking quick results, then even a single remaining habitual tendency at life’s end will inevitably lead to rebirth in the cycle of reincarnation.

Buddhist scriptures mention that even Arhats (accomplished practitioners) lose memories of past lives upon rebirth. For example, Master Guishan was reborn three times as a king and nearly forgot his original nature; Master Yunmen also reincarnated three times as a monarch, losing his spiritual powers in the process. This illustrates the inherent dangers on the path of cultivation.

The swiftest method of cultivation is refining the Golden Elixir (Jindan, the core of internal alchemy). The wonder of the Golden Elixir lies in using "fire" (the energy of intention) to refine "gold" (primordial Qi). One must practice continuously in daily life, working through the six sense faculties—eyes, ears, nose, tongue, body, and mind—relentlessly tempering them until all habitual tendencies are purified and one’s true nature fully manifests. Through this systematic cultivation, one ultimately reaches a state of naturalness beyond deliberate practice, where the true Dharma body emerges from formlessness, and the perfect reward body is attained. This is the achievement of the Ninefold Revolving Golden Elixir, where form and spirit become wondrous, transcending the cycle of birth and death to become a Great Awakened Realized Being.

The Patriarch is admonishing those who focus solely on singular methods of cultivation. The "awakening" mentioned here refers only to a later stage of Chan meditation—true Buddhas and Bodhisattvas all attain the flawless wondrous fruition through exhaustive investigation of heavenly principles and complete manifestation of their inherent nature. This cannot be generalized.

As for those who pursue rebirth, seizing another’s body, shifting dwellings, or retreating to remote mountains—the so-called "Four Fruits Practitioners" (seekers of four levels of attainment)—these are all lesser vehicle practices. Since ancient times, only the Great Dao of the Golden Elixir can truly transcend life and death. Sadly, the Great Dao is hard to attain while lesser fruits are easily obtained. Given the varying capacities of people, many abandon the great for the small, clinging to minor methods and considering them sufficient. When the great moment of death arrives and their cultivation remains incomplete, fearing reincarnation, they resort to various means: some learn techniques of returning to emptiness to be reborn, some seize corpses to reincarnate, others constantly change dwellings, and some retreat to deep mountains seeking immortality.

The so-called "Four Fruits" practitioners of the past (referring to the four stages of Buddhist attainment) all fell into lesser vehicles precisely because they failed to comprehend the profound mystery of the Golden Elixir (Jindan) path. The essential method of Golden Elixir cultivation lies in harmonizing the dragon and tiger—the dragon symbolizes the heart-mind (Shen), while the tiger represents the physical body. To subdue one's own body and mind is true dragon-taming and tiger-subduing. When the formless body and the mysterious spirit completely merge, one naturally attains the marvelous state of unified form and spirit—this constitutes the indestructible true gold that serves as the foundation for human existence. A dwelling built with this true gold never decays; practitioners abide within it whether walking, standing, sitting, or reclining. Even as oceans turn to mulberry fields, they remain serene and unperturbed—how could there be any worry about deterioration or displacement? Why pursue those insignificant lesser attainments?

Those cultivation methods involving mirror-gazing at forms, breath retention, or deity visualization may seem arduous at first but deceptively smooth in later stages. Even if one momentarily traverses myriad realms in spirit travel, it ultimately resembles inhabiting a crumbling house that must eventually be abandoned—this chapter precisely illustrates how minor paths cannot endure. Only a dwelling built of true gold remains eternally uncorrupted, proving that all practices not grounded in this genuine substance are impermanent. Regrettably, various heterodox techniques each produce their own effects, often deluding worldly people: so-called "form-reflection" might involve forging large mirrors to constantly observe one's shape until forgetting form and entering the mirror, or sitting in stillness with closed eyes to internally contemplate the body; "breath suspension" means withholding respiration, gradually progressing from one or two breaths until not even a goose feather at the nostrils would stir; "deity contemplation" could mean silently worshipping the Celestial Emperor or visualizing the Kunlun paradise until the spirit eventually departs. These three methods respectively fixate on form, Qi, and Shen—all belonging to the dregs of conditioned existence, worlds apart from the supremely simple Golden Elixir path. Though initially extremely difficult, if exclusively practiced for long periods, these minor arts can indeed produce Yin-spirit travel during samadhi, allowing instantaneous journeys across the nine continents that appear remarkably impressive. Yet the physical body, like a house, remains difficult to stabilize—when form and spirit ultimately separate, one inevitably faces "abandoning the crumbling dwelling." This explains why Four Fruits practitioners cannot escape the great limitation of birth and death. Truth-seekers should thoroughly investigate the great medicine of the Golden Elixir rather than confine themselves to these lesser techniques.

When Buddhism exhorts sentient beings toward rebirth in the Pure Land of Ultimate Bliss, it is precisely because this paradise fundamentally represents the Golden Elixir path. Among all phenomena in the world, only the Golden Elixir is truly real—other methods are not ultimate truth and need not waste one's energy in speculation.

This chapter directly reveals that human nature itself is the Western Pure Land, helping practitioners understand their ultimate destination. Buddhism has the Pure Land practice, which teaches people to recite the Buddha’s name with undistracted concentration until the mind no longer wanders. At the end of life, Amitabha Buddha will welcome them and guide them to rebirth in the Western Pure Land (see the Amitabha Sutra and other scriptures). Yet people often cling to the outward image of the Western Pure Land and rarely investigate its true nature. In fact, it is only a skillful teaching devised by the ancient Buddhas to guide sentient beings. One must not cling to appearances and lose sight of one’s own nature.

The East belongs to Wood, which in the Five Phases (Wood, Fire, Earth, Metal, Water) symbolizes growth: it is where all things sprout and flourish. The West belongs to Metal, which symbolizes gathering and return: it is where all things return to their roots. In the trigrams of the Book of Changes, the Qian trigram lies in the northwest in the Later Heaven arrangement, precisely the position of Metal. The sovereign of the eastern Zhen trigram, symbolizing the vitality of life, can return to the root and restore its life only here. Li Changzhe, a revered Daoist master, says that Buddha-nature is the virtue of utmost Yang. From ancient times to the present, this pure and undivided Qian Metal alone has remained unchanged; it is the true nature inherent in everyone. This Metal nature is steadfast and strong, indestructible through countless kalpas. Its essence is pure and white, untouched by anything. Unstained, indestructible, and enduring forever—is this not the Pure Land?

The Vimalakirti Sutra says, “When the mind is pure, the Buddha-land is pure.” The Platform Sutra says, “If the mind-ground is pure, that is the West of one’s own nature.” This Metal nature is neither something commonly seen nor a state of annihilation. Formless and without appearance, it can nevertheless manifest the Buddha’s sixteen-foot golden body, his majestic physical form, and the thirty-two marks of excellence, his sublime features. The formless body is called the Dharma Body; the signless appearance is called true form. Wondrous existence and true emptiness are present together. The Western Pure Land is right before us, just as the Buddhist scriptures say: “Only this is true; the other two are not.” Anyone still arguing over whether the West is near or far, whether the Pure Land exists or not, or whether there is a distinction between the defiled land and the pure land—and still thinking in terms of going or coming after death—has already turned away from the true meaning. Thus the truth of Donghua, the Daoist realm of immortals, is the ancient Buddha of the West; the attainment of the Golden Elixir Way is the ultimate rank of the Golden Immortal. This is precisely the “Dharma Gate of Nonduality” described in the Vimalakirti Sutra.

The Patriarch worried that practitioners might develop a dualistic understanding, so he made this point especially clear: ordinary words contain the highest truths, which must be carefully realized within them. Those who can reflect on their own nature in daily life can transform all the things of the dusty world into treasures. This chapter shows that the Great Dao is present in everyday speech, guiding practitioners to grasp the profound meaning beyond words. The Wuzhen Pian is nearing its close here, and the Patriarch fears that people will treat it as no more than abstruse theory, letting his earnest efforts go to waste.

I must particularly remind you all not to seek mysterious principles beyond ordinary speech, imagining them to be the supreme Dao. The true Dao actually resides in the bustling marketplace of daily life, within common language—it's just that people fail to contemplate it carefully.

What exactly is the Dao? Initially, "One" gives birth to "Two," "Two" gives birth to "Three," and "Three" gives birth to the myriad things—this is the natural process of generation. Common people use the Dao every day without realizing it. What we call the "Five Phases (Wuxing) moving forward" (referring to the natural cycles of mutual generation and restriction among Metal, Wood, Water, Fire, and Earth) transforms generative energy into destructive energy. If one can reverse this process—returning the myriad things to Three, Three to Two, and Two to One—this constitutes the inverse cultivation that leads to sagehood. When sages purify their minds to return to original authenticity, they practice this reverse cultivation. The so-called "inversion of the Five Phases" transforms destructive energy back into generative energy.

Generative and destructive energies are ultimately two sides of the same coin—the key lies in whether one can transform them. Thus, if one can practice inverse cultivation in daily life, the entire world becomes a treasure. The "great earth" symbolizes our physical body, while the "dust and sand" represent our thoughts. If practitioners can awaken through the minutiae of daily life, return to their original mind, and attain the state of body-mind unity, then the entire cosmos—all sentient and insentient beings, past and present, above and below—can awaken to the Dao. At that point, what distinction remains between great earth and dust? What need is there to differentiate sage from commoner, pure from defiled, immortal from Buddha?

The secret of this "inversion" lies entirely within ordinary speech. You must understand that the entire Wuzhen Pian (Awakening to Reality) speaks in plain language, as do the ten thousand volumes of alchemical classics (Neidan texts), the Buddhist Tripitaka's twelve divisions, the Confucian Six Classics, and the writings of the Hundred Schools of Thought. Clinging to these words while seeking the Dao won't work, nor will abandoning them. What then should one do? This ultimately depends on individual awakening.

This volume's essence mutually illuminates the previous two, sometimes supplementing principles not fully explained earlier—all to help practitioners advance further from their current foundation. If anyone truly comprehends this, they may join Master Wuzhen (Zhang Boduan) in walking the path of cultivation.