《紫陽真人悟真篇三註》Vol. 4

The greatest obstacle in genuine cultivation is that excessive visibility makes true refinement difficult to achieve. Thus, authentic adepts often conceal themselves among ordinary people, making their depth unfathomable. For those practicing methods to transcend worldly dust, the key lies in leaving no trace of their whereabouts. As Laozi said: "When facing him, you cannot see his head; when following him, you cannot see his back." He also stated: "Precisely because it cannot be known, we reluctantly describe it as the state of 'illuminated understanding.'"

Reflecting on ordinary people who seek the Dao through clever tricks, deceitful schemes, or frivolous behavior—they only drift further from the true path. Immortal Elder Zhang Boduan (Master Ziyang), fearing later generations of Dao-seekers might fail to comprehend, composed sixty-four poetic verses that directly point to the original mind in every word and thoroughly penetrate true nature in each line. With repeated admonitions, he revealed celestial secrets and profound mysteries, solely wishing to universally deliver sentient beings to the immortal realm—such is the pinnacle of compassion. When genuine practitioners reach this stage, how can they not study these verses repeatedly to accomplish their Dao attainment?

(Annotation on the five-character eight-line verse):

"The maiden in blue garments" refers to the yang qi (vital energy) in the dragon meridian (known as "Wood Maiden" in Daoism), symbolized by blue as it originates from the eastern Azure Dragon position. "The youth in white robes" refers to the yin qi in the tiger meridian (known as "Golden Youth" in Daoism), symbolized by white as it originates from the western White Tiger position. Visible forms with material substance belong to the turbid qualities of the post-heaven state, hence "visible yet unusable." The formless primal qi of the nascent state ("first crescent qi") exists in a condition of hazy obscurity, hence "usable yet invisible." Only when yin and yang energies intermingle in primordial chaos can genuine transformation occur.

The profound cultivation mysteries revealed by Master Ziyang in Awakening to Reality (Wuzhen Pian) center on grasping the "True Unity Qi" (Xiantian Yuanqi, Primordial Energy). This energy originates before the formation of heaven and earth, existing in a state of primordial chaos. Though formless and shapeless, it possesses transformative and spiritual qualities—precisely what Daoism refers to as "generating being from non-being."

The key to refining the Golden Elixir (Jindan) lies in mastering temporal rhythms. Sages can condense the climatic changes of an entire year into a single shichen (two-hour period), then further divide it into six phases, with only two phases truly dedicated to firing the alchemical process. Through precise control of the firing times, one can crystallize a millet-sized Golden Elixir within an extremely short period, suspended in the Dantian (North Sea). This arcane method requires direct oral transmission from a genuine master to comprehend fully.

Master Lu Ziye's commentary elaborates: In cultivation, "the maiden clad in blue" symbolizes mercury within wood (representing the Original Spirit, Yuanshen), while "the youth robed in white" signifies gold within water (representing the Original Essence, Yuanjing). These two must merge in their pre-manifest, primordial state—once they take form, they become mundane substances unfit for alchemical refinement.

Master Shangyangzi's annotation clarifies that these eight verses encapsulate the essence of the entire alchemical scripture: The first line refers to the Zhen trigram (east, wood) representing the Original Spirit; the second denotes the Dui trigram (west, metal) embodying the Original Essence; the third describes the union of Yin-Yang generating life force; the fourth transitions to practical refinement; the fifth details specific cultivation methods; the sixth warns of potential dangers; the seventh marks the successful ninefold refinement of the Golden Elixir; and the eighth emphasizes the necessity of prolonged practice. The entire poem guides practitioners to seek the primordial Hunyuan True Unity Qi—the foundational energy embodied by the Great Unity Perfected Being (Taiyi Zhenren, a revered Daoist deity)—highlighting the critical importance of receiving masterly instruction.

The twelve Moon Over West River (Xijiang Yue) poems correspond to twelve months of practice. "West" signifies the metal direction, "river" symbolizes water's nature, while "moon" metaphorically represents the Golden Elixir's function. Internal and external elixirs share the same essence, requiring dual cultivation. Internal alchemy (Neidan) relies on the body's innate true fire (Xiantian Yuanqi) burning continuously in the Dantian; external alchemy (Waidan, here referring to practice methods) demands diligent adjustment. The most profound mystery lies in discovering the "true seed" (Xiantian Yiqi, Primordial Breath)—the decisive key to successful cultivation.

This passage elucidates the distinction and interrelationship between "internal medicine" (neiyao) and "external medicine" (waiyao) in Daoist Neidan (internal alchemy) practice.

Master Daoguang (a renowned Song Dynasty Daoist) states in his Yimen Pomi Ge: Although the foundation of cultivation (the Dao) lies within, the placement of the furnace and cauldron (metaphors for the cultivation site) exists externally; while in external cultivation, the core elements—Kan and Li (Yin-Yang), lead and mercury (alchemical terms representing the two qi of Yin and Yang)—reside internally. Here, the two types of "medicinal substances" (cultivation materials) are clearly distinguished.

External medicine refers to the Golden Elixir (Jindan), which forms within the furnace and cauldron of perfect Yin-Yang balance (two eighths), completing its process in less than half a shichen (ancient time unit). Internal medicine denotes the advanced cultivation stage of "golden liquid returned elixir" (jinye huandan), requiring ten months (symbolizing a complete cultivation cycle) of gestation within oneself to achieve spiritual rebirth. Though both medicines share similar effects, their specific cultivation methods and "firing times" (cultivation rhythms) differ significantly.

During external alchemy practice, when harmonizing the initial energy (dantou), phenomena like "dragon and tiger" (Yin-Yang) combat, metal and wood mutual conquest, and water-fire clashes emerge—all requiring precise control without error. Internal alchemy demands even greater caution against dangers; despite the body's natural true fire burning continuously, it still requires regulation through external cultivation methods.

The subtle transformations of both internal and external true fire rely on the miraculous function of true lead (pure Yang qi), which controls mercury (Yin qi) to prevent its dissipation. Ye Wenshu (possibly a practitioner) misunderstood this principle, erroneously believing internal medicine relied on true fire cultivation while external medicine needed ordinary fire regulation—a fundamental misinterpretation of their essential nature.

The human body is born endowed with heaven-earth essence and shaped by Yin-Yang. Within its form, Jing (essence), Qi (vital energy), and Shen (spirit) constitute the primary elements, mutually dependent. Yet solely cultivating the postnatal Jing, Qi, and Shen (all belonging to Yin) cannot attain pure Yang perfection. As Zhongli Quan (one of the Eight Immortals) observed, the seven substances of the human body are all Yin in nature; cultivating any single one constitutes "isolated Yin." The Cantong Qi (a crucial alchemical scripture) similarly notes that just as a hen cannot successfully hatch eggs alone, cultivation requires proper Yin-Yang coordination.

This passage elucidates the relationship between "true essence" (zhenjing) and the "primordial Qi of the Dao" (xiantian yiqi) in Daoist Neidan (internal alchemy) practice. The so-called true essence is a yin substance generated in the postnatal realm, elusive and prone to dissipation. Practitioners must gather the primordial Qi (the most fundamental energy of the cosmos according to Daoism), simultaneously capturing both true yin and true yang—these two cognate substances—to refine into the supremely yang elixir known as "true lead" (a Neidan term denoting pure yang essence). As this process occurs outside the body, it's termed "external medicine" (waiyao).

Using this yang elixir to subdue one's own "yin mercury" (a metaphor for vital essence within the body) resembles a cat catching mice. The yang elixir acts like the mother-energy of heaven-earth, while yin mercury functions as the child-energy—their mutual attraction follows the principle of like attracting like. This transformation occurs internally, hence called "internal medicine" (neiyao). The scripture cites the Immortal Elder and the Cantong Qi (The Seal of the Unity of the Three), emphasizing that the Golden Elixir (jindan) is transformed from primordial Qi, existing even before the formation of heaven and earth.

By using the primordial yang elixir to transmute internal yin mercury, coupled with the regulation of yin-yang "talismanic fire" (breath control methods during practice), and through the ten-month refinement cycle (a Neidan term denoting the complete cultivation period), the physical form can be transformed into Qi, Qi into spirit (shen), ultimately achieving unity with the Dao and transcending the constraints of yin-yang. This mystical state relies entirely on the function of primordial Qi—it cannot be attained through postnatal yin energies or mundane substances like ordinary lead and mercury.

Finally, Ziyi and Shangyangzi point out: Neidan practice shares the same principles with external alchemy (waidan). Practitioners must comprehend the operational principles of internal and external yin-yang. Internal medicine originates from self-cultivation, while external medicine derives from the essence of heaven-earth. Only by thoroughly understanding this fundamental distinction can cultivation yield twice the result with half the effort. If misled by heretical teachings and mistaking postnatal impurities for cultivation materials, one risks falling into erroneous paths.

The cultivation of the Golden Elixir (Jindan, the core concept of Daoist Neidan, referring to the crystallized life energy formed through refining essence [Jing], vital energy [Qi], and spirit [Shen]) hinges on harmonizing internal and external practice. Internal cultivation focuses on nurturing the mind and innate nature, while external cultivation regulates the flow of Qi and blood in the body. The true path to the Golden Elixir requires dual cultivation of nature and life (Xingming Shuangxiu)—cultivating both the spiritual nature and the physical form—to ultimately attain the realm of celestial immortality.

This scripture particularly emphasizes that genuine cultivation does not require withdrawing from worldly life. Three commentators elucidate this from different perspectives:

Daoist Master Daoguang points out that Golden Elixir cultivation is remarkably swift and efficient—when practiced correctly, results can manifest within a single session (half a shichen, approximately one hour). Every household has the conditions for cultivation; there is no need to deliberately retreat to mountain forests. Precisely because the principle is so simple and straightforward, explaining it plainly might even provoke laughter. However, he cautions that if the practitioner lacks virtue (De) or violates the teachings of their master, even knowing the method will not lead to success.

Master Ziye employs vivid analogies to illustrate the efficacy of the Golden Elixir: its effects are as immediate as a shadow cast by a pole or an echo in a valley. True Golden Elixir cultivation merely requires the interaction of "lead and mercury" (Neidan terminology, symbolizing the body’s Jing and Qi) and can be accomplished at home—why seek out famous mountains and remote rivers?

Master Shangyangzi further clarifies that the essence of Golden Elixir cultivation lies in harmonizing the body’s Yin and Yang (symbolized by the dragon and tiger, representing the two Qi forces) and seizing the creative mechanism of Heaven and Earth. Those with wisdom grasp it immediately and diligently practice, while those who mock or slander it lack karmic fortune. He stresses that cultivation need not adhere to rigid forms—whether in mountain seclusion, bustling cities, or even daily labor, one can refine the Dao. Those who believe monastic life or seated meditation are the only valid paths fundamentally misunderstand the subtle function of true Yin and Yang (the intrinsic energies within the body).

Together, these three masters reveal: The Great Dao (Dao) is supremely simple—cultivation lies in understanding the principles and practicing earnestly, not in external forms. The true obstacle is not the environment but the practitioner’s awareness and virtue (De).

This passage elucidates the profound mystery of the "White Tiger's First Essence" (Baihu Shoujing) in Daoist Neidan (internal alchemy) practice, referring to the body's primordial Jing (essence). The so-called "White Tiger's First Essence" is actually the purest Qi (vital energy) in the human body, as pristine as the first crescent of the moon. This has nothing to do with heterodox practices of yin-yang exploitation - to misinterpret this orthodox cultivation method as some licentious technique would be a blasphemy against the Dao (the Way), inviting karmic retribution.

The authentic prenatal Qi, known in Daoism as "Zhenyi Zhiqi" (True Unity Energy), is called "True Unity Water" in celestial terms and "First Crescent Energy" when manifesting in the human body. When refined in the mouth cavity (Huachi, "Flower Pool"), it becomes "Divine Water," the most precious "True Gold." Though named differently, these all represent the same primordial essence at various stages of cultivation. As the Daode Jing states, "The highest virtue is like water" - this prenatal energy existed before heaven and earth formed, hence its designation as "supreme virtue," with roots far deeper than ordinary post-natal substances.

The "Nine Transformations" refer to nine years of dedicated practice, akin to Bodhidharma's nine-year wall-gazing meditation. To achieve this profound accomplishment, practitioners must first cultivate their innate nature, stabilize emotional fluctuations, and discern priorities. Precise timing in practice and maintaining a yielding, non-contentious state are essential to avoid dangers. Through ten months of fire-regulation (huohou) practice resembling pregnancy, the physical form gradually transforms into Qi, which then refines into Shen (spirit). Nine years of concentrated cultivation ultimately lead to the marvelous unity of form and spirit, merging with the Dao. This is what sages call the "Nine-Cycle Golden Liquid Great Return Elixir."

Additional note: Men at sixteen and women at fourteen years begin generating this prenatal essence. This nascent Jing constitutes the "First Essence," also called "Divine Water." The Daode Jing's analogy of "supreme virtue resembling water" illustrates how this prenatal energy nourishes life far beyond ordinary medicines. The "Nine Transformations" signify the perfection of alchemical fire-regulation, with mental purity being paramount.

This passage explains several key concepts and precautions in Daoist Neidan (internal alchemy) practice. It first mentions the "White Tiger" (referring to the unruly Jing-Qi [essence-energy] within the human body), which can harm the practitioner if not properly regulated. The "first menstruum" (primordial essence) is a rare and precious substance for cultivation, but if obtained at the right moment, it holds the potential for achieving celestial immortality.

Several patriarchs particularly emphasize that one must never misinterpret the "White Tiger's first menstruum" as sexual cultivation techniques, as such misunderstanding invites calamity. Truly accomplished practitioners must learn to observe lunar phases ("the crescent moon appears on the third day" refers to the new moon on the third lunar day) to discern the optimal timing for generating the "divine water of Hua Pool" (saliva) within the body.

While refining the Golden Elixir may seem straightforward, the most challenging aspect is the "self-refinement" (cultivation of mind and nature). Just as a lamp's wick anticipates changes in flame intensity, the body's "true fire" (original spirit, Shen) operates with even greater subtlety. One must first tame one's own essence-energy (true dragon) before mastering the White Tiger's Qi to obtain "true gold" (the Golden Elixir). The patriarchs' greatest concern is that later practitioners might neglect mental cultivation and consequently face dangers during alchemical practice.

The text uses metaphors to illustrate cultivation principles: "household servants" represent the practitioner's genuine Qi, while "true lead" (original essence) and "true mercury" (original spirit) interact like metal and wood in mutual generation, requiring the "yellow matron" (true intention) as their mediating agent. When metal (lead) resides externally and wood (mercury) internally, true intention must guide their union. Like the mutual attraction between man and woman, the metallic and wooden Qi forces intermingle, ultimately gestating the Golden Elixir within. Throughout this process, Yin and Yang energies cooperate through specific firing phases (Yin tally and Yang fire) to achieve harmonious unity.

This scripture elucidates the core principle of "lead-mercury conjunction" (qian-gong xiangtou) in Daoist Neidan (internal alchemy) practice, using the metaphor of marital union to describe the cultivation process.

Metal (representing original Jing/essence and lead) and Wood (representing original Shen/spirit and mercury) possess inherently complementary qualities that attract each other. Metal's nature is firm and intense, while Wood's is yielding and benevolent—like a devoted couple whose union gives birth to the "infant" (Golden Elixir). This alchemical process occurs within the practitioner's body, hence the reference to "conception." However, without the accumulation of virtuous deeds (Yinde) that benefit others, ordinary people can never comprehend this profound mystery.

Master Ziye explains: Mercury (Shen) originates within oneself but requires lead (Jing) to stabilize it; lead is produced in the lower Dantian (the Kun palace), with the two initially separated. Their meeting requires a "matchmaker" (fire regulation through proper timing). All things share the same origin, which is why Metal and Wood, though separated, naturally attract each other. Only adepts who understand the transformations of Yin-Yang can truly master this secret.

Master Shangyang further clarifies: True lead emerges from kidney water (the chamber of creation), while true mercury arises from the heart-mind (the embodiment of creation). If one fails to control wandering thoughts (self-refinement), mercury disperses; without mastering the critical moment (furnace timing), lead escapes. Through cultivation, one gains mastery over this process. Just as marriage requires a matchmaker, Metal-Wood union depends on fire regulation. When successfully conjoined, they create the wondrous state of "male pregnancy" (elixir formation). Yet without the nourishment of virtue (De), one cannot wield this power effectively at crucial junctures.

The passage concludes with symbolic imagery: The maiden (Yin mercury) and youth (Yang lead) unite within the earthen cauldron (Dantian), tempered by fire regulation (the Elder Ding) like loving spouses. The River Chariot (celestial cycle) circulates ceaselessly, transporting vital essences to the crown (Kunlun summit). The lunar number "two-eight" represents true mercury, while the solar "nine-three" signifies Yang elixir—their meeting in the Dantian's earthen cauldron forms the three natures (Jing, Qi, Shen), completing Golden Elixir refinement through fire regulation and the interplay of Water and Fire.

This passage explains the principle of "lead and mercury" (symbolizing the yin and yang energies within the human body) circulating in Daoist Neidan (internal alchemy) practice. Lead represents yang energy, while mercury represents yin energy. These two are refined and combined in the Dantian (the "earthen cauldron") through the inner fire (Ding fire).

Like a loving couple, the yin and yang energies must continuously unite. Practitioners must use intention to guide the Qi downward from the Kunlun peak at the crown (the Niwan Palace, or "mud pellet palace") to nurture the "spiritual embryo" (the nascent form of the inner elixir), ultimately refining it into the Golden Liquid Returning Elixir (the advanced inner elixir).

Mercury, being yin, is likened to a maiden of sixteen (the Channü, or "enchanted girl"), while lead, being yang, is compared to a youth of twenty-seven (the Langjun, or "young lord"). Mercury is the essence of Wood, and lead is the essence of Metal, requiring Earth (the central palace of the spleen) as the mediating element. When the three natures—Metal, Wood, and Earth—combine and are tempered by the true fire, lead and mercury fuse. Just as fire rises, the elixir's energy steams downward, naturally forming a circulating pathway (the "river chariot") that ascends to the Niwan Palace at the crown.

Regarding the concept of "seven returns and nine reversions": this is not a simple measure of time (such as from the hour of Yin to the hour of Shen) but refers to the complete cycle of the Five Phases' energy within the body. Heaven's One generates Water, and Earth's Six gives it form; Earth's Two generates Fire, and Heaven's Seven returns it to its source. Through the complete circulation of the Five Phases—Wood, Fire, Earth, Metal, and Water (such as three parts Wood and four parts Metal)—the Golden Elixir ultimately coalesces in the central palace of Earth. Throughout this process, the entry and exit of energy are inseparable from the Mysterious Feminine (the Qi cavity of the Dantian). When yin and yang energies are abundant, they naturally connect with the divine.

This passage elucidates the core principles of Daoist Neidan (internal alchemy) practice, focusing on the transformative interplay of the Five Phases (Wuxing) and the harmonious union of Yin-Yang to reveal the mysteries of elixir refinement.

The Five Phases (Wood, Fire, Earth, Metal, Water) form the foundation of alchemical practice. Mercury represents the authentic unitary Qi (vital energy), undergoing five transformative stages: first becoming water (North), then cinnabar (South), transforming into wood (East), transitioning to metal (West), and finally coalescing into the Golden Elixir (Jindan) in the central palace. The formation of this elixir requires the coordinated operation of cosmic forces—heaven and earth, sun and moon, seasonal cycles, and the Five Phases—demanding both complete temporal cycles and perfect Yin-Yang equilibrium for successful completion.

Fire corresponds to the number seven, metal to nine, and their alchemical marriage constitutes the crucial juncture. As the Dragon-Tiger Scripture states, the essence of alchemy lies precisely in this metal-fire conjunction. The metallic quality within mercury is termed "metal within water"—the fundamental material for Neidan cultivation. To grasp its profundity, practitioners must access the Mysterious Feminine (Xuanpin), the primordial gateway of Yin-Yang interaction.

Cinnabar belongs to mercury's domain, while golden fluid pertains to lead; when emotional consciousness returns to original nature, the returned elixir is achieved. This process originates from the Primordial Qi (cosmic source energy), born from the wellspring of creation—hence mercury's designation. Without this supreme substance, no elixir can coalesce; without the Mysterious Feminine as foundation, energy cannot circulate and transform.

Elixir refinement embodies the dialectical relationship of masculine containing feminine, Yin embracing Yang. The dragon symbolizes the feminine quality within Yang (male housing female), while the tiger represents the masculine essence within Yin (female embracing male). When these energies merge, they crystallize into the numinous elixir. Consuming this Golden Elixir grants miraculous transformation—a serpent instantly becomes a dragon, a chicken metamorphoses into a phoenix soaring to the realm of true Yang. Such is the wonder of alchemy: through Yin-Yang fusion, the spirit (Shen) and earthly soul (Po) achieve sublime elevation.

Three perfected masters (Ziye, Shangyangzi, and Daoguang) all emphasize this principle of mutual containment: outward strength harbors inner gentleness, apparent whiteness conceals hidden darkness. This dynamic equilibrium of complementary opposites—where seeming contradictions achieve synthesis—constitutes the fundamental principle of alchemical attainment and Dao-realization.

This scripture elucidates the core principles and precautions of Daoist Neidan (internal alchemy) practice.

Master Ziyang (a pivotal figure in Daoist internal alchemy traditions) emphasizes that the key to cultivation lies in harmonizing Yin and Yang. When the body's Yang essence (Yangjing) merges with Yin Qi, the "Great Medicine" (a technical term referring to the refined essence produced through alchemical practice) can be forged. This spiritual elixir can transform all things that obtain it—how much more so for human beings?

Just as heaven and earth operate through the alternation of day and night, practitioners must understand the importance of timing. Like wheel spokes converging at the axle or rivers flowing into the sea, cultivation requires mastery of "extraction and replenishment" (methods for regulating the alchemical fire). The authentic essence (Zhenyi Zhi Jing) gives rise to the dual energies of Yin and Yang, which in turn generate the Four Symbols (Lesser Yang, Greater Yang, Lesser Yin, Greater Yin), Five Phases (Metal, Wood, Water, Fire, Earth), and all phenomena. Obtaining this "One" enables the completion of all cultivation.

Three commentators provide further explanations:

Master Daoguang states that regulating the alchemical fire must begin from the "Tunmeng" (initial stage) and continue through "Jiji Weiji" (completion stage). Daily practice should be as continuous as a turning wheel or rivers returning to the sea. Though this "One" is formless, it can be apprehended through harmonizing Yin-Yang and regulating the fire. After attainment, even greater caution is required to prevent losing what was gained through arduous effort.

Master Ziye stresses that the moment of Yin-Yang union marks the proper timing for applying the fire. This resembles the primordial chaos at creation's dawn—no directional distinctions are needed, yet practitioners must remain vigilant against distracting thoughts. A single moment of carelessness could undo years of dedicated practice.

Master Shangyang warns that alchemical refinement is profoundly difficult. After obtaining the Golden Elixir (cultivation achievement), one must retreat into seclusion, diminish desires, and maintain diligent practice while forgetting external circumstances. These precautions are even more essential before attaining the elixir.

The essence is this: cultivation requires harmonizing Yin-Yang, mastering the timing of fire regulation, and exercising utmost care in safeguarding the Golden Elixir once obtained—all achieved through continuous refinement by reducing distracting thoughts and desires.

This passage elucidates the relationship between "fire timing" (huohou, the mastery of cultivation timing) in Daoist Neidan (internal alchemy) practice and the cosmic transformations of Yin-Yang. Practitioners must emulate the ways of true immortals by maintaining equanimity after attaining the elixir, remaining undisturbed by external phenomena to ensure safe cultivation until ultimate success.

The text employs the hexagrams of the Zhouyi (Book of Changes) to illustrate Yin-Yang fluctuations: At winter solstice, the nascent Yang energy corresponds to the Fu hexagram (single Yang line), with each subsequent thirty days adding another Yang line—progressing through Lin, Tai, Dazhuang, and Guai—until reaching the pure Yang Qian hexagram (six Yang lines) in the fourth month. Conversely, at summer solstice, the emerging Yin energy manifests as the Gou hexagram (single Yin line), similarly gaining one Yin line every thirty days through Dun, Pi, Guan, and Bo, until forming the pure Yin Kun hexagram (six Yin lines) by the tenth month. This constitutes the annual waxing and waning rhythm of Yin-Yang.

Practitioners must condense this yearly cycle into monthly and daily observations: From the new moon (first day of the lunar month), Yang energy grows—adding one Yang line every two and a half days—until reaching full Yang at the full moon (fifteenth day). From the sixteenth day, Yin energy germinates (Gou hexagram). Similarly, within a single day, midnight (zi hour, 11pm-1am) marks the birth of Yang energy (Fu hexagram), while noon (wu hour, 11am-1pm) signals Yin's emergence (Gou hexagram). Thus, refining the elixir (Neidan practice) demands precise attunement to these pivotal moments of Yin-Yang transition, as crucial as understanding day-night alternations.

Zive (one commentator) adds that the winter solstice's nascent Yang symbolizes the timing of elixir formation within the human body—a qi transformation observable even within monthly cycles. As Yang energy fills from Fu to Qian hexagrams, the transition from Qian's zenith to Gou signals the elixir's impending dissipation, much like the moon waning after fullness. This juncture requires particular attention to regulating the "thermal balance" (Yin-Yang equilibrium) in cultivation.

This passage elucidates the critical importance of timing in Daoist Neidan (internal alchemy) practice and the essential role of master-disciple transmission.

In Neidan cultivation, practitioners must precisely observe two crucial temporal nodes: the midnight Zi hour (23:00-1:00) and the noon Wu hour (11:00-13:00). The Zi hour represents the nascent emergence of Yang Qi (symbolized by the Fu hexagram), while the Wu hour marks the initial stirring of Yin Qi (represented by the Gou hexagram). Only when adepts perfectly synchronize their personal Yang Qi activation with the cosmic Yang movement can they hope to achieve the Golden Elixir.

The winter solstice embodies nature's cycle of Yang Qi renewal, while the appearance of "true lead" (primordial Qi) within the human body reflects this microcosmic process. Just as all things begin growing after the solstice, when personal Yang Qi stirs and true lead manifests, this pivotal moment demands immediate refinement - missing this opportunity results in impure alchemical materials.

After obtaining a single grain of the Golden Elixir, it must be harmonized with one's "true mercury" (original spirit, Yuanshen). Through the tempering of Yang fire and modulation of Yin talismans, the practitioner's spirit envelops the Yang essence. This process requires direct oral transmission from a master - no written text can adequately convey it.

Some individuals who cannot even distinguish the Five Phases (Wood, Fire, Earth, Metal, Water) or the Four Symbols (lesser Yang, greater Yang, lesser Yin, greater Yin), nor understand the properties of cinnabar, mercury, lead or silver used in alchemy - let alone grasp the subtleties of fire regulation - presumptuously claim to be reclusive masters. Worse still, they persist in error while misleading others, causing truth-seekers to stray permanently from the path - such behavior is truly lamentable.

Successive patriarchs have consistently emphasized that the Zhouyi Cantong Qi (The Kinship of the Three) holds the key to understanding alchemical scriptures. Yet worldly seekers often encounter teachers lacking authentic transmission who lead them into heterodox paths. These false guides, having barely mastered basic breathing techniques, fantasize about cloud-riding immortality while arrogantly instructing others. Not only do they refuse self-correction, but they also mislead others into spiritual oblivion - actions that violate cosmic principles and invite karmic retribution.

As Confucius observed, those of medium or higher capacity may receive profound teachings, while those below cannot comprehend them. The alchemical lead, mercury, cinnabar, silver and earth constitute the Five Phases, while Qian (Heaven), Kun (Earth), Kan (Water) and Li (Fire) represent the four cosmic creative symbols. Among the elements, fire stands as the most numinous - its spiritual nature manifests in daily cooking, lamp lighting and divination practices. The "true fire" (spiritual fire of the original spirit) employed in cultivation proves even more miraculous, possessing the power to realize Buddhahood and Dao.

The practice of cultivating immortality can transcend natural laws, yet ignorant people, having never encountered a true master, remain unaware of the methods for refining the Golden Elixir (Jindan). They indulge in empty talk of nothingness and reckless abandon, deceiving the world with flowery words. These misguided individuals refuse to reflect on their errors and act without regard for karmic retribution. Since receiving my master's teachings, I have sought to awaken such people and guide them back to the true path. Sadly, those with shallow understanding often prove stubborn and difficult to instruct. As Zhuangzi said, "Those with incomplete innate nature" — these words hold profound truth.

Cultivation requires the accumulation of eight hundred virtuous deeds and three thousand hidden merits (good deeds done in secret), dissolving the distinctions between self and others, and resolving grievances. Only then does one align with the fundamental pursuit of immortality. Upon reaching this state, neither fierce beasts nor weapons can harm you, and worldly troubles cannot bind you. When celestial talismans (signs of divine approval) descend from heaven, you may ascend to the celestial realms in a phoenix-drawn chariot.

Three eminent Daoist commentators note: After nine years of dedicated cultivation, when merit and virtue are perfected, one transcends the duality of self and object. At this moment, celestial talismans descend, and ascension to the heavens marks the fulfillment of a great man's achievements. The path of cultivation progresses from deliberate methods (specific practices) to the realm of non-action (Wuwei, natural spontaneity) — this is the true abode of immortals.

Practitioners should diligently cultivate virtue and accumulate hidden merits, steadfastly upholding good deeds despite demonic obstacles and distractions. With such sincerity, even karmic debts from past lives will naturally dissolve, and calamities will not befall them. Figures like Celestial Master Zhang (Zhang Tianshi), Xu Xun (Xu Jingyang), and Ge Xuan (Ge Xianweng) attained the Dao through arduous practice, ultimately ascending in broad daylight. Some today claim that immortality depends solely on past-life foundations — this is a grave misunderstanding. Ge Xianweng, for instance, only encountered the Great Dao at sixty years of age, and his hardships defy description.

Laozi spoke of ancient adepts whose profound mystery was unfathomable — this precisely refers to the abstruse states encountered in alchemical cultivation. It is precisely because it is unfathomable that one can achieve eight hundred virtuous deeds and three thousand hidden merits. Just as the Cowherd and Weaver Girl meet (symbolizing Yin-Yang harmony), or the tortoise and snake intertwine (Yin-Yang union), the convergence of sun and moon generates the mutual transformation of Yin and Yang Qi. This is the essence of cultivation.

This passage elucidates the vital importance of Yin-Yang harmony in Daoist cultivation. Master Ziyang and three commentators (Daoguang, Ziye, and Shangyangzi) employ natural phenomena as metaphors for the alchemical principles of inner refinement.

Daoguang uses the annual meeting of the Cowherd and Weaver Girl stars on the seventh night of the seventh month, the monthly conjunction of sun and moon, and the entwined forms of tortoise and snake to illustrate how the union of Yin and Yang Qi constitutes the fundamental law of cosmic operation. Just as alchemical transformation requires the integration of the True One Qi (primordial energy) with Yin-Yang energies to take form, the Golden Elixir (Jindan) cultivation likewise demands Yin-Yang harmonization. Quoting the Can Tong Qi's analogies of calling ospreys and marital union, he emphasizes the principle that solitary Yin cannot generate life, nor can isolated Yang foster growth.

Ziye further explains that celestial bodies (Cowherd and Weaver Girl), terrestrial creatures (tortoise-snake), and solar-lunar cycles all follow the natural law of Yin-Yang mutual attraction. Alchemical practice violating this principle—whether through exclusive Yin or Yang—defies the Dao of nature.

Shangyangzi criticizes those who meditate alone in mountain retreats while neglecting Yin-Yang balance, identifying this as a major cultivation fallacy. Just as severed heaven-earth interaction and disordered seasons would prevent life's flourishing, Golden Elixir refinement must adhere to the principle of Yin-Yang harmonious interchange.

The concluding reference to the Xijiangyue poetic meter subtly suggests that Yin-Yang regulation resembles the lunar intercalary month's function in harmonizing solar-lunar calendar discrepancies. The core teaching throughout is clear: cultivation must emulate nature's patterns by mastering the mystery of Yin-Yang union—solitary practice without this understanding cannot achieve fulfillment.

Master Ziyang Zhenren (Zhang Boduan) reveals a core truth in Awakening to Reality (Wuzhen Pian): the Golden Elixir (Jindan) cultivated within the human body—a crystallized essence of life energy formed through Neidan (internal alchemy) practice—is the most precious treasure of the physical form. Once the Golden Elixir is perfected, it grants boundless transformative power and, more crucially, enables one to fully awaken to ultimate truth in both mind and nature, transcending the cycle of birth and death. These wondrous effects need not await future lives; even in this very existence, one may attain spiritual powers akin to those of enlightened beings. This practice was first verified by the Dragon Girl (a Buddhist figure who achieved sudden enlightenment by offering a jewel), yet few have inherited its essence in later ages.

Chan Master Daoguang (a Song Dynasty monk) annotates: This very principle embodies the original intent of Bodhidharma's transmission of Dharma from the West. The mind-to-mind lineage passed down through Chan patriarchs, the teachings spread by the Sixth Patriarch Huineng at Caoxi, and Master Mazu Daoyi's famous koan about "the waters of West River"—all point to the same truth. Regrettably, later generations neglected genuine practice, indulging only in empty philosophical discourse. Thus, the patriarchs resorted to shouts, blows, and myriad skillful means—guiding those of superior capacity through direct cultivation, those of middling capacity through mind-realization, and those of lesser capacity at least to remember the teachings. True practice must begin with refining one's nature (the "Jade Liquor" process of self-purification) before advancing to life-force cultivation (the "Golden Liquor" method of elixir refinement). Foolish minds mistakenly believe Chan offers "instant enlightenment with a single word"—this is utterly delusive. Know that the Great Dao of the Golden Elixir is the supreme path of cultivation.

Master Lu Ziye (a Song Dynasty Neidan adept) concludes: The phrase "The Elixir is the supreme treasure of the physical body" encapsulates the essence of the Golden Elixir tradition—no further explanation is needed.

Master Shangyangzi (a Neidan patriarch) elaborates: Even the majestic Dharma form of the Tathāgata arises from refining an ordinary mortal body. Thus, the supreme treasure of the Golden Elixir need not be sought in remote mountains—it must be cultivated precisely within worldly existence. Though the perfected elixir grants limitless spiritual powers, only those who first illuminate mind and realize true nature qualify as genuine practitioners. As Master Daoguang clarifies: Cultivating nature refers to self-refinement, while cultivating life-force is the path of elixir return. This is not about accumulating merit for future lives, but achieving Buddhahood in this very body. Recall how five thousand disciples departed when Śākyamuni preached on Vulture Peak, while the Dragon Girl attained sudden enlightenment by offering her pearl.

Finally, five septasyllabic quatrains (symbolizing the Five Phases) illuminate this truth: Even full realization of one's Buddha-nature cannot prevent rebirth. Far better to simultaneously cultivate the Great Medicine of the Golden Elixir (Neidan), thereby directly transcending samsara to become a Perfected Being (the highest Daoist attainment).

This passage primarily discusses the importance of "dual cultivation of nature and life" (xingming shuangxiu) in Daoist practice. Master Ziyang (a key figure in Daoist internal alchemy) employs commentaries from several eminent adepts to elucidate the shortcomings of cultivating either nature (mental refinement) or life (physical cultivation) in isolation.

Master Daoguang (one commentator) states: Although Buddhism emphasizes awakening the mind, this alone does not represent the highest attainment. While the Great Dao of the Golden Elixir (Jindan, the core method of internal alchemy) ultimately aims at obtaining the "medicine" (refining the inner elixir), it must be grounded in enlightened awareness. Relying solely on insight to achieve Buddhahood is impossible; similarly, pursuing the elixir without cultivating the mind is perilous. True Golden Elixir practice should flow naturally like the moon's course—beginning from the position of Western Geng Metal (the Dui trigram in the Bagua) and merging with Northern Kan Water (the Kan trigram), where Metal and Water mutually generate to perfect the elixir. Techniques like massage and breathing exercises are merely peripheral methods.

Master Ziye (another commentator) cites the Yijing (Book of Changes): One must exhaustively investigate heavenly principles and fully cultivate innate nature to reach the state of transforming life—this is the principle of dual cultivation. Cultivating nature without life is like the imbalance of Yin-Yang causing illness, leading to the danger of "abandoning one body only to enter another" (losing control over the cycle of rebirth).

Master Shangyangzi (a third commentator) criticizes how people misunderstand the patriarchs' original intent. When later patriarchs frequently referenced Buddhist teachings, they emphasized the necessity of dual cultivation. Yet some slanderously claim that invoking Buddhism after attaining the Dao is deceitful. In truth, those who cultivate only Buddhist nature without refining the Golden Elixir can never achieve Buddhahood. Practices like breath retention may induce meditative trances (ding) and spirit projection (shenyou), but because the spirit (shen) belongs to Yin, it remains unstable, forcing frequent bodily transitions (rebirth). Without grasping the mystery of "gold and mercury returning" (a Neidan term for transforming essence, qi, and spirit), how could one hope for physical transcendence or ascension in broad daylight?

The passage concludes that authentic cultivation requires dual refinement, where both form and spirit attain subtle perfection to unite with the Dao. So-called "four-fruit disciples" (those pursuing four inferior outcomes)—whether through rebirth, possession, or occupying another's body—pale in comparison to those who truly "subdue the dragon and tame the tiger" (harmonizing Yin-Yang) and "build the foundation with true gold" (forging the Golden Elixir).

This passage describes the differences among several levels of Daoist cultivation. The true Great Way of the Golden Elixir—the highest stage of Neidan, or internal alchemy—can free a person from the cycle of rebirth, while other methods have their limitations.

First, it explains the differences among several forms of cultivation. “Building a house with real gold” is a metaphor for Golden Elixir cultivation: like constructing a house from genuine, solid materials, it is strong and enduring. By comparison, “entering a womb and taking over a body”—continuing life through reincarnation or by occupying another person’s body—is practiced by followers of the Four Fruits of Buddhism (stream-enterer, once-returner, non-returner, and arhat) and by ghost immortals, beings of a lower attainment. The truly advanced practice is “subduing the dragon and taming the tiger”—harmonizing Yin and Yang within the body—which is the subtle method for refining the Reverted Elixir, an advanced form of Neidan.

Once the Way of the Golden Elixir is achieved, it can be preserved forever. A practitioner can cultivate a “body outside the body,” a manifested form of the Yang spirit, and make it appear or vanish at will. This is entirely different from the practitioners who rely on reincarnation. Shangyangzi explains further that reincarnation is like the Zen story of the Fifth Patriarch, Hongren, being reborn into the Zhou family as the Sixth Patriarch, Huineng. One may hope to continue cultivating in a future life, but only if one keeps the Daoist heart clear and undeluded. Otherwise, once one loses the human body, one falls into the cycle of rebirth for countless ages.

The passage next criticizes the practice of “contemplating forms, holding the breath, and focusing on the spirit,” a method that uses visualization and breath retention to gather the spirit. It is difficult for beginners. With practice, one may travel through ten thousand lands in an instant—that is, send the original spirit out of the body. But the result is a Yin spirit, a spirit-consciousness of Yin nature, which is easily corrupted and ultimately still depends on entering a womb and taking over a body. This is entirely different from the Way of the Golden Elixir, which cultivates the Yang spirit, a spirit of pure Yang.

Shangyangzi points out that merely holding the breath and nourishing it cultivates only the Yin spirit. Even after ten thousand years of practice, one will ultimately come to emptiness and extinction, unable to transcend. He tells the story of Lü Dongbin, one of the Eight Immortals, instructing the monk Fazhen. Seeing Fazhen seated in meditation for twenty years, Lü Dongbin asked whether he thought that sitting meditation alone could lead to the Dao. Fazhen said yes. Lü Dongbin explained the problem: while meditating, one may seem free of greed, anger, and delusion, but when events arise, these false thoughts return. True cultivation must begin with refining the mind; once the mind is refined, one can regulate the breath. Then even sleeping all day is part of cultivating the Dao, so why cling to seated meditation? Sadly, Fazhen failed to understand.

Master Ziyang (a patriarch of Daoist Neidan/internal alchemy) and his disciple Zhen encountered a Buddhist monk practicing seated meditation. Zhen explained that this monk had accumulated merit through years of meditation, seeking Buddhahood. The master suggested observing the monk's practice together.

During their silent observation, Zhen saw a three-inch red snake crawl from the monk's head. The serpent slithered down from the monk's left foot, consumed some phlegm on the ground, drank from a chamber pot, then exited the room. It crossed a small ditch, played among flowers, but turned back when attempting to cross another swollen stream. The master placed a knife blocking its return path, frightening the snake into retreating up the monk's right leg. The monk immediately awoke.

The monk described his dream: exiting through a left gate to find lavish feasts and fine wine, attempting to cross a river where beautiful maidens waited, retreating from rising waters, then fleeing bandits through a right gate. Master and disciple laughed and departed, explaining: the bedposts were dream gates, phlegm became feasts, urine transformed into wine, ditches appeared as rivers, flowers manifested as maidens, and the knife represented bandits.

The master revealed: the monk's cruel temperament and habitual anger had manifested this snake form, destined for serpentine rebirth. He identified himself as Lü Dongbin (one of the Eight Immortals), appearing only because of Zhen's sincere practice. Zhen subsequently followed him to immortality.

The text concludes by criticizing those seeking Buddhahood through empty meditation: Buddhism's "Pure Land" secretly points to the Golden Elixir path (Daoist Neidan). Śākyamuni (Gautama) himself achieved his golden body through harmonizing Yin-Yang (lead-mercury alchemy). Recognizing the illusory body and following true instruction reveals immortality is nearer than imagined—the Dao originally makes no distinction between Buddhist and Daoist paths.

Lu Ziye (a Song Dynasty Daoist internal alchemy master) explains: Gold symbolizes the most precious treasure in the world - the more it's refined, the stronger it becomes, remaining indestructible through countless kalpas. What Buddhism calls the "Great Awakened Golden Immortal" actually refers to the state achieved through cultivating the Golden Elixir (Jindan) of the Great Dao.

Master Shangyangzi (a patriarch of Daoist internal alchemy) further elucidates: The true realm of ultimate bliss transcends coming and going, birth and death. It's like transforming an entire river into ghee (a Buddhist offering) and performing the abhiseka (highest Buddhist initiation) with the finest cream - this is what Buddhists call the Golden Elixir. The scriptures clearly state there's only this one fundamental method, all others being branches. The true path to immortality lies solely in the Golden Fluid Returning Elixir (Jinye Huandan, the highest state of internal alchemy) - there exists no second path to Buddhahood.

Our ordinary daily speech and actions often secretly correspond with the profound mechanisms of the Dao. If one can inversely contemplate everyday phenomena, even dust and sand can be transformed into treasures. Xue Daoguang (a Song Dynasty internal alchemy master) points out: The True Lead and True Mercury (Zhenqian Zhenhong, internal alchemy terms referring to human essence, qi and spirit) needed for cultivation are actually present in daily life. By mastering the secret of reverse cultivation, the entire world becomes a treasury for practice. As the ancient song formula says: "These treasures are in your household every day, you just haven't noticed them."

Lu Ziye adds: The profound mechanism of reverse cultivation has already been clearly revealed in previous texts. It's like finding beautiful jade hidden within ordinary stones, waiting to be discovered by discerning eyes. Master Shangyangzi emphasizes: Daily activities are themselves cultivation - as predecessors said, "Day and night both serve as the practice ground." True practitioners must carefully observe during daily life; only after receiving guidance from an enlightened teacher can they comprehend the mystery of transforming dust into treasure.

The epilogue of Awakening to Reality (Wuzhen Pian) states: Human life originates from deluded thoughts and attachments - the physical body brings all kinds of afflictions. To be free from afflictions, one must realize the supreme Dao; to realize the Dao, one must first illuminate the mind and see one's true nature. The mind is the substance of Dao, while Dao is the function of mind. When one contemplates the original mind and nature, perfect brightness naturally manifests - no deliberate cultivation is needed to reach the other shore directly. Without a mind clear as a mirror and radiant spiritual light, how could one suddenly transcend all forms and break free from worldly ties? For those true practitioners who have illuminated their minds and realized the Dao, neither the physical body can burden their nature, nor external circumstances can disturb their true self - neither weapons nor fierce beasts can harm them.

Master Ziyang reveals a profound truth in his Commentary on Awakening to Reality: Those who have truly attained the Dao possess minds as clear as mirrors—reflecting all things yet undisturbed by external phenomena. They respond fluidly to circumstances, harmonizing with all beings without imposing dominance. Thus they transcend worldly attachments while remaining unharmed. This embodies the supreme wonder of the Dao.

In truth, the Dao itself is nameless; the sages reluctantly named it "Dao." The Dao is also ineffable; the sages reluctantly used words to describe it. Yet without names and language, ordinary people could never recognize the Dao’s essence or return to their original nature. Therefore, the sages established teachings and left writings to illuminate the Great Dao. The Dao must be expressed through words, yet words must ultimately return to the Dao’s wordless state.

Alas, the Great Dao is profoundly subtle and elusive. Ordinary people, dull in nature and clinging to their physical forms, crave life and fear death, making genuine understanding rare. Out of compassion for such attachments, the Yellow Emperor and Laozi (revered as Daoism’s founding sages) first taught longevity techniques to align with people’s desires, gradually guiding them. The key to cultivating longevity lies in refining the Golden Elixir (the core of Daoist Neidan practice), while refining the elixir depends on the "Divine Water and Blossoming Pool" (a Neidan term describing specific energy circulation within the body). This is why classics like the Daode Jing and Yinfu Jing, which expound these practices, have endured through the ages.

Yet these texts employ cryptic language and profound principles. Though students may memorize the words, few grasp their true meaning. Without oral transmission from a realized master, even a lifetime of study cannot lead to successful cultivation. Thus, throughout history, Daoist seekers have been as numerous as ox hair, while those attaining the Dao remain as rare as unicorn horns.

Master Ziyang recounts: After receiving the elixir methods (Neidan techniques) from his teacher in Chengdu, he thrice transmitted them to unworthy recipients—each time suffering calamities within twenty days. When sores later erupted on his back, he recalled his teacher’s warning: "Only those who can free you from bondage are worthy recipients; others must be refused." Wishing to share these truths yet fearing public disbelief, he composed the Awakening to Reality, meticulously detailing the principles of elixir cultivation.

After attaining enlightenment, the Purple Yang Zhenren (honorific title of Zhang Boduan, patriarch of the Southern Daoist School) composed the Wuzhen Pian (Awakening to Reality) to transmit his teachings to his disciple Shi Xinglin. He observed that many truth-seekers came to study with sincere devotion, and moved by their earnestness, he could not refuse them—though he selected recipients carefully. None of those he taught were powerful officials, exceptionally talented individuals, or those of outstanding virtue. When misfortune befell him twice, he initially failed to comprehend the reason. Only upon the third occurrence did he awaken to the realization that these were celestial punishments for defying the will of Heaven.

The Great Elixir (the core method of Neidan, or internal alchemy) is actually exceedingly simple—so much so that even an ordinary fool, upon mastering it, could immediately transcend the mundane and attain sagehood. Precisely because of this, Heaven treasures this method and forbids its reckless transmission to the unworthy. Zhang Boduan suffered repeated calamities for disregarding his master’s warnings and divulging celestial secrets multiple times. These punishments arrived swiftly and unerringly, instilling such fear in him that he resolved henceforth to remain silent—even under threat of violence—and never again impart the teachings lightly.

The Wuzhen Pian meticulously records the subtle essentials of the Great Elixir, including its "medicinal ingredients" (the Jing, Qi, and Shen required for cultivation) and "firing times" (the precise timing and intensity of practice). Those with an innate karmic affinity for immortality possess the wisdom to grasp these teachings intuitively upon reading the text, without needing oral instruction from Zhang Boduan. This is a grace bestowed by Heaven, not a transmission made by his own will. The text concludes with methods for "seeing one’s true nature" (awakening to the mind’s essence)—the supreme path of Wuwei (non-action) and wondrous enlightenment. This teaching affirms the equality of all things; though its secrets are openly revealed, no transgression is incurred.

Yet ordinary people differ in the depth of their karmic obstructions and the sharpness of their understanding. Hearing the same truth, they interpret it differently—just as the Dharma expounded by Śākyamuni Buddha and Mañjuśrī Bodhisattva, though ultimately a single vehicle (the highest teaching), was perceived by listeners as three vehicles (greater, middling, and lesser) according to their capacities. In the future, should those of profound wisdom encounter the Wuzhen Pian, they will recognize that Zhang Boduan attained the supreme subtlety of Bodhidharma and the Sixth Patriarch (patriarchs of Chan Buddhism), capable of awakening myriad truths with a single word. If readers, hindered by residual habits, remain confined to middling or lesser understanding, the fault lies not with Zhang Boduan.

This preface was composed on the wuyin day of the fifth month in the first year of the Yuanfeng era (1078) under Emperor Shenzong of Song, with Zhang Boduan (courtesy name Pingshu) of Tiantai reaffirming his intent.

The Wuzhen Pian is the work of the Purple Yang Zhenren, written after his enlightenment to transmit the Dao to Shi Xinglin.

The Wuzhen Pian with Triple Commentary by Master Ziyang comprehensively elucidates the essential alchemical principles of Neidan (internal alchemy) practice—including the medicinal ingredients (metaphors for inner energies) and fire phases (timing and intensity of cultivation)—through poetic verses. The work additionally incorporates twelve lyric poems to the tune of Moon over the West River, an instructional song dedicated to Daoist Liu of White Dragon Cave, exegetical chapters interpreting the Zhouyi Cantong Qi (the Token for the Agreement of the Three by Wei Boyang of the Eastern Han), along with eulogies and yuefu-style poems. These supplementary materials were later compiled as the Outer Collection of Wuzhen Pian. From exhaustive investigations into the principles of human nature (xing) and vital life (ming) to the ultimate transcendence beyond the cycles of life, death, and yin-yang duality, this treatise leaves nothing unaddressed. Even if Lord Lao (the deified Laozi) or Sakyamuni Buddha were to descend and teach anew, their methods could not surpass the profundity contained herein. —With reverent colophon by Master Zixian (Xue Daoguang), the eminent Song dynasty Daoist.