《道體論》

The Treatise on the Dao's Essence explores the fundamental nature of Dao (the Way) and De (Virtue/Power) and their interrelationship. Presented in a question-and-answer format, it elucidates several core concepts:

First, it defines Dao and De. Dao is the origin from which all things arise ("perfectly penetrating the beginning of transformation"), possessing infinite inclusiveness; De is the ultimate force that brings all things to completion ("fulfilling the end of things"). Though they appear as two distinct concepts, they are fundamentally unified. Like the obverse and reverse sides of a seal, Dao is the internal unifying force, while De is the external manifestation of accomplishment.

A question arises: If Dao is said to be the origin of all things' intrinsic nature, what exactly does this "origin" refer to? The response clarifies: This origin is the very beginning of all things' intrinsic nature. As the scripture states, "De fulfills the end of things," we can deduce that while the intrinsic nature of all things stems from Dao, their concrete forms are shaped by De.

Regarding the Daode Jing's assertion that "Dao gives birth and De nourishes," the text explains: From the perspective of the fundamental source, Dao generates all things; from the perspective of concrete nurturing, De sustains them. This is akin to a mother's relationship to her child—giving birth (生) and then nourishing (畜).

Finally, the discussion turns to whether the "origin of intrinsic nature" can be named. The answer is profoundly paradoxical: It can be said to have a name, and yet it can also be said to be nameless. This reflects the Daoist dialectical thinking of "being and non-being giving rise to each other"—the primordial Dao transcends all conceptual distinctions, neither confined by names nor separate from concrete manifestations.

Through this layered questioning, Master Tongxuan (an honorific title for the Tang dynasty Daoist Zhang Zhihe) reveals the dual aspects of Dao and De as one unified reality: Dao is the formless essence, while De is its concrete function; Dao governs generation, while De governs fulfillment. This philosophy later became a crucial theoretical foundation for Daoist cultivation—one must both realize the formless Dao and embody the tangible De.

Someone asks: If "having names" is the same as "having no names," then why do the classics say that "having no names" is the origin of all things, while "having names" is self-evident? The answer is: The term "Dao" is used to describe the universal source that generates all things. Since it can generate all things, traces are left behind; where there are traces, names can be given. Thus, what can be named and described is not the eternal and unchanging Dao. Yet the essence of Dao is vast and boundless—its meaning cannot be confined to any single aspect. Terms like "utterly ineffable" (xuanmiao) are used to describe Dao so that people may move beyond superficial appearances and grasp its profound essence.

Another asks: Is this vast and boundless Dao the same as or different from concrete things? The answer is: Dao is both eternally unchanging and constantly transforming. All things take Dao as their root, and Dao also manifests itself through all things. Within the same essence, there exist both good and evil, right and wrong, as well as life and death, harmony and opposition. Just as fish depend on water to live but may also die by water, or as humans walk upon the earth but may stumble upon it—yet in the end, they must still rely on the earth to stand again.

Yet another asks: The classics say that Dao generates all things and De (Virtue/Power) nurtures them, and also that "to generate and to nurture, this is called Mysterious De." Why does it first speak of Dao generating and later of De generating? The answer is: The earlier mention of "Dao generating" emphasizes the foundational role, while the later "De generating" describes the actual process of manifestation. It is like how the interaction of Yin and Yang produces transformation, yet Yang holds the dominant position; or how ruler and minister govern together, yet the credit ultimately belongs to the ruler. The forms of all things are indeed brought forth by De, but their ultimate origin lies in Dao. What Dao generates is the undifferentiated whole, the nameless primordial state. It pervades all things, infinitely profound, elusive and beyond words—it cannot be said to exist, for within it there is substance; nor can it be said not to exist. Above, it does not shine with brightness; below, it does not sink into darkness. Its beginning cannot be found, nor its end seen. Its origin cannot be explained, nor can it be questioned. It has no fixed form yet reveals images; it does not speak yet fills the world.

Only when forms and names are established do distinctions arise between the ordinary and the sage. The ordinary cannot awaken on their own—they must accumulate insight to reach understanding. The sage does not abandon sentient beings but teaches according to their capacity. The variations in capacity and teaching give rise to all phenomena. Viewed from their root, this is the manifestation of "Dao-De": Dao takes perfect unity as its foundation, while De takes self-realization as its essence. Perfect unity means there is no principle beyond comprehension; self-realization means there is no nature beyond fulfillment. The perfectly unified Dao cannot truly be named—it is only reluctantly called "Dao." The self-realized De does not seek gain—it manifests through actual effect. De prioritizes diligent cultivation, while Dao takes the gradual shedding of attachments as its guiding principle.

This scripture primarily explores the essential characteristics of the Dao (the Way) and its relationship with all things, employing a question-and-answer format to delve progressively deeper.

It first points out that the movement of the Dao encompasses everything, and by continuously reducing attachments, all burdens can be eliminated. When one reaches the state where both Dao and De (Virtue/Power) are forgotten, merging into oneness with all things, one becomes like an empty vessel capable of containing everything, with inexhaustible function. The Dao is both infinitely vast and exquisitely subtle, circulating and transforming to bring all things to fruition. Just as Laozi (the founder of Daoism) manifested in the Zhou dynasty, using the Daode Jing to propagate profound teachings and save the world.

Regarding the essence of the "Way of Primordial Unity," the scripture explains: Its nature lies in using "emptiness" to contain "all existence." When asked whether "Primordial Unity" and the "Dao" are one or two, the answer is "both one and two"—from the perspective of manifested names and forms, they are two; from the perspective of their shared essence, they are one. Just as "Great Image" is the name and "Primordial Unity" is the essence, the name and the essence may appear different, yet the name ultimately points to the essence, and the essence is revealed through the name. Thus, they are both identical and distinct.

Finally, it emphasizes: Names cannot exist apart from substance, and substance can be used to unify names. Yet if one analyzes meaning solely through names, then names and substance mutually encompass one another. When discussing their differences, distinctions appear, but when returning to the essence, they reunite into oneness. This reflects the Daoist dialectical thinking of "names and substance generating one another."

This passage discusses the relationship between the essence of the Dao (道) and its names. It first clarifies that the "substance" (the true essence of Dao) does not exist independently beyond names, thus names can encompass substance—essence and name are fundamentally one.

Someone asks: The classics state that the "Great Image" (大象, the manifestation of Dao) has no fixed form, while the "Undifferentiated Whole" (混成, the primordial undivided state) represents the original substance—are these two not distinct? The response explains: The "Great Image" is the name, while the "Undifferentiated Whole" is the substance. When names begin to describe substance, how can they be identical?

Regarding the sequence between name and substance: From the perspective of original substance, substance precedes name; yet from the standpoint of doctrinal principles, name comes before substance. The reason for discussing the "Great Image" first and then the "Undifferentiated Whole" lies in the necessity of using names to elucidate principles. Although names and principles become clear through this process, the concept of original substance remains unestablished—hence the initial proposition that "the Great Image has no form." Phenomena cannot exist without basis; there must be a subtle substance underlying them. This perfectly pervasive substance is called the "Undifferentiated Whole."

Concerning two interpretations of the "Undifferentiated Whole": Viewed intrinsically, it represents the undifferentiated chaotic state; when considering concrete phenomena, all things are encompassed within this "undifferentiated" state. The former refers to the condition of primordial unity, while the latter indicates that although individual things exhibit differences, they all originate from this undifferentiated chaos.

The discussion then turns to the characteristics of "emptiness and stillness" in the Dao's nature: "Emptiness" (虚) means the original substance has no fixed form, while "stillness" (寂) denotes its principles being soundless and traceless. Emptiness and stillness are both attributes of the original substance and essential to the teaching method. The Dao as teaching transcends form, using lofty expressions to guide beings beyond turbidity; whereas the Dao as realized understanding recognizes the original substance's inherent stillness—its principle of "constant non-being" (常无) permeates all things.

Finally, regarding the relationship between the "emptiness and stillness" of embodying the Dao and the "Undifferentiated Whole": They are both identical and distinct—identical in that both describe the Dao's essence, yet distinct in perspective. The "Undifferentiated Whole" emphasizes the primordial state, while "emptiness and stillness" highlight essential attributes.

Someone asked: What is the essential nature of the Dao's substance? The answer is: The substance of Dao is fundamentally mysterious void, an undifferentiated primordial chaos in perfect stillness, hence called "uniform chaos." Yet from the perspective of encompassing all things, this state of stillness appears insubstantial, thus termed "differentiation."

The questioner pressed further: If stillness lacks substance, does this mean emptiness manifests only when separated from chaos, or is chaos itself inherently empty? The response clarified: The principle is originally unified. When discussing the relationship between chaos and stillness, we must distinguish between two perspectives—truth and illusion. Viewed through illusion, stillness perpetually contains chaos, as the Daode Jing states: "There was something undifferentiated and yet complete, existing before Heaven and Earth." This reveals all things remain eternally within chaos. Viewed through truth, chaos perpetually contains stillness, as scriptures say: "Following the great transformations' flow, voidness is fundamentally empty"—all phenomena arise and perish instantaneously, their present existence being essentially eternal stillness.

Another objection arose: Since all things clearly possess substantial form, how can their essence be called void? The reply explained: All forms manifest through karmic forces (cause and effect), with purity and defilement having no fixed states—all things transform according to mental activity. Like diseased eyes seeing phantom hairs in empty space that vanish when vision clears, when karmic obstructions purify, the Three Realms (Desire, Form, and Formless Realms) cease to exist entirely.

Regarding chaos and stillness' relationship, the questioner continued: From truth's perspective, chaos is essentially stillness; from illusion's perspective, stillness is essentially chaos—are these two states separate or interconnected? The answer revealed: When illusions dissolve, chaos transforms into stillness; when truth becomes tainted, stillness transforms into chaos. Truth and illusion have no fixed appearances—chaos and stillness shift according to conditions. Their interconnection or separation follows this principle.

Finally came the inquiry: If neither truth/illusion nor chaos/stillness remain fixed, what concept ultimately describes Dao's substance? The response outlined three levels: First, "chaos" names generative transformation, while "stillness" names illusion's dissolution. Second, to enter the mysterious state, one must transcend chaos/stillness duality. Ultimately, even "stillness" must be relinquished, as scriptures say: "The nameless is the beginning of Heaven and Earth." True Dao-substance surpasses both speech and silence. Language can only discuss things' coarse aspects; the subtle is grasped through mental apprehension. Yet Dao itself transcends all subtle/coarse distinctions—inexpressible in words, inconceivable to thought.

The Dao (referring to the cosmic origin and ultimate truth) is neither substantial existence nor sheer nothingness. Without beginning or end, its perfect essence permeates all things, its subtle profundity transcending the limitations of form and name. Yet ordinary people, constrained by sensory perception, cannot comprehend its mystery. Thus in this ineffable state, we reluctantly name it "Dao."

This reluctantly named "Dao" is the origin of all things. From this origin emerges primordial Qi (vital energy). When concrete forms manifest, we call their nurturing function the "Mother." But while the Mother finds fulfillment in cultivating De (Virtue/Power), the Origin remains free from seeking or grasping. Both Origin and Mother dissolve together in the mysterious realm, penetrating the distinction between self and other. Only through discerning these principles can we speak of Dao.

Question: If "the nameless" is called the origin of things and "the named" is called the Mother of things, both imply generation—what distinguishes them?

Answer: The formless, nameless Dao neither arises nor perishes, thus serving as the origin. Heaven and Earth, having form and name, continuously generate things, thus called the Mother.

Challenge: When we reluctantly name it "Dao," is this because its quiescent nature permits forced naming, or because it inherently lacks names and humans impose them?

Answer: This forced naming has no relation to its essence—it's purely human action.

Follow-up: If naming doesn't relate to essence, what meaning does it hold?

Answer: Precisely because essence cannot be forcibly defined, it can be reluctantly named. Precisely because this naming neither adds nor subtracts from essence, it reveals its wondrous function.

Question: If Dao exists only in namelessness without manifesting in concrete things, how can it be called supreme?

Answer: Only through being formless and nameless can it generate all formed and named things—thus we know all concrete existence originates from Dao.

Question: If all things individually embody Dao and are self-sufficient, why practice cultivation?

Answer: While Dao itself is undifferentiated, concrete phenomena vary—hence the need for cultivation.

On apprehending essence: When we say "the nameless" is Dao, can we grasp essence?

Answer: Clinging to "namelessness" won't attain Dao, nor will clinging to "the named," nor to "being/nonbeing" or "nonbeing/being." Only by neither confining oneself to these four concepts nor separating from them can one potentially awaken.

Finally, on cultivation results: If all four cognitive approaches fail, is attainment impossible?

Answer: True "attainment" isn't relative to "loss." Only the "non-attainment" that transcends both can be genuine attainment. This attainment-through-non-attainment harmonizes all four approaches.

The essential principle of Dao: The Dao's essence is vast and omnipresent. Precisely because it's omnipresent, it transcends all limitations of form and name.

The Discourse on the Dao's Essence explores the fundamental characteristics of the Dao through a dialectical question-and-answer format. Its core teaching is that the Dao's essence both transcends all things and permeates them—a seemingly paradoxical nature that must be understood through the dynamic relationship of "sameness and difference."

First, it explains that the "Dao's essence" (道体) possesses dual attributes: Phenomenologically, it pervades all things, where distinctions of sameness and difference exist among phenomena; yet ontologically, these distinctions ultimately dissolve into nondifferentiation. Like observing objects—one may perceive concrete differences (妙绝, wondrous transcendence) while simultaneously recognizing their unified essence (体周, all-pervading substance). The perfect integration of these two aspects constitutes the Dao.

A challenge arises: If the Dao permeates all things (体周), why is it also said to transcend them (妙绝)? The response clarifies that distinction and unity are two sides of one reality. Just as unity can be discerned within difference (not mere vague uniformity), so too can difference be recognized within unity (not mechanical separation). This relationship is neither simple juxtaposition nor hierarchy but mutual interdependence—knowing difference through sameness, and sameness through difference.

Further elaboration reveals that when discussing the Dao, the concepts of "sameness and difference" are provisional tools meant to ultimately surpass such dualities. Using "sameness" to harmonize differences and "difference" to illuminate unity, the true Dao's essence clings neither to sameness nor difference. This state of transcending opposites constitutes the mysterious origin.

Regarding the Dao's relationship with phenomena: A questioner objects that if the Dao were juxtaposed with concrete things, it would become an ordinary existence. The response emphasizes that true "ultimate wonder" (至妙) is an absolute realm beyond all opposition. So too with "stillness" (寂, quiescent essence)—genuine stillness transcends even the concept of "stillness," just as true knowing surpasses subject-object dichotomies.

The conclusion synthesizes the Dao's relationship with all things: It is eternally the same (identical in essence) yet eternally distinct (diverse in manifestation). This apparent contradiction reveals an ultimate truth beyond conventional logic—the Dao is simultaneously immanent within all things and transcendent beyond them.

This scripture explores the relationship between the Dao and phenomena. It begins by clarifying: from the perspective of phenomenal differences, Dao and phenomena are distinct; yet in essence, phenomena are Dao, and Dao is phenomena.

Someone asks: If phenomena are Dao, does Dao then have life and death? The answer is: One may say it does, and also say it does not. Essentially, since phenomena are Dao, when phenomena undergo birth and death, so does Dao. As the classics state: Dao and phenomena follow the same principle—waxing and waning, cyclical transformation. The divine operation (Shen) of Dao transforms with all things, following their lifecycles, though Dao's origin remains unfathomable. Like fish living and dying in water—the life and death belong to the fish, not the water itself. Another interpretation: From the differentiated view there is life and death, but Dao as totality encompasses all, transcending such distinctions. Life and death pertain only to particular phenomena, never affecting Dao's essence. Hence it's said: Dao has no beginning or end, only phenomena experience life and death.

Another question: If Dao is without beginning or end while phenomena have life and death, when all things undergo cyclical transformation, is it the phenomena or Dao that transforms? The answer: Both perspectives hold. The manifold changes of phenomena constitute "phenomenal transformation," yet essentially, all changes stem from emotional obstructions. By transcending these, one realizes all transformations never depart from the noumenon—this is "noumenal transformation" (Dao's own movement).

Follow-up: If the noumenon transforms with phenomena, how can it remain noumenon? The response: Phenomenally, the noumenon appears to move with things; but by utterly transcending distinctions, movement and stillness merge—even the concept of "noumenon" dissolves, leaving no basis for motion.

Another inquiry: All things originate from Dao—unitary in origin yet infinitely differentiated. Are these manifold appearances Dao or not-Dao? The answer: At the boundary of Dao and phenomena, no absolute distinctions exist. Affirmation implies negation; negation implies affirmation.

Pressing further: When affirming, we don't include negation; when negating, we exclude affirmation—how can they be conflated? The reply: Without the concept of "not," why ask about "is"? The very question "is" presupposes "not"; to say "not" is actually to speak of "is."

Final question: Since all things come from Dao, who created these distinctions? The answer: No one deliberately creates distinctions—they emerge spontaneously. Follow-up: If distinctions arise spontaneously, aren't they entirely my own affair? What then is Dao's role? The text leaves this unanswered, implying through prior discussion that as noumenon, Dao does not interfere with phenomenal transformations.

This dialogue explores the relationship between the Dao and personal conduct. It begins by clarifying that when one comprehends the origin of the Dao, it is called "attaining the Dao" (dedao); the cultivation one achieves is termed "Dao-gong" (merit of the Dao). Someone asks: If my actions determine the goodness or evil of the Dao, then are good deeds credited to the Dao while evil acts blamed on it? The response states: Performing good deeds aligned with the Dao naturally yields virtuous results, while committing evil through the Dao brings corresponding retribution. If one consciously chooses evil, how could the Dao prevent it? As the scriptures say: Those who walk with the Dao attain it, while those who deviate lose it.

The discussion continues: Since all things are manifestations of the Dao, why should evil be attributed to me? The reply explains: You yourself are part of the Dao—choosing evil means the Dao manifests as evil through you. Is this not your own choice? Another objection arises: If I am the Dao, why doesn't the Dao prevent evil? The clarification follows: Evil actions stem from your personal choice; since the Dao is you, how can it oppose itself?

Regarding why one should study the Dao, the response emphasizes: Studying the Dao means self-cultivation. When people understand goodness originates from themselves, they won't commit evil; knowing evil arises from within, they won't cling to goodness. Transcending attachment to both good and evil constitutes the true Dao. Why exhaust oneself in the cycle of rejecting evil and pursuing good?

Finally, the dialogue examines the philosophical concept of "having yet not having" (you er bu you). From the perspective of the Dao's quiescent nature, "having" refers to the mysterious generative power (as described in the Daodejing: "In the dim and dark, there is essence [jing]"), not concrete form. Viewed from primordial wholeness, "having" exists within the totality without separate manifestation. It can also mean non-attachment to any particular "having." Concerning "being without yet not without" (wu er bu wu), the explanation is: essentially "without" means formless and imageless, while "not without" indicates the formless form—the mysterious presence of the Dao.

This passage from the Discourse on the Dao's Essence primarily examines the fundamental characteristics of the "Dao's essence" (Daoti), clarifying its relationship with material forms through a question-and-answer format.

It first points out that the Dao's essence cannot be defined simply as "having form" nor entirely summarized as "formless." From the perspective of its quiescent and innate nature, the Dao's essence transcends all material manifestations; yet from the standpoint of encompassing all things, since phenomena themselves possess form, it cannot be said to be entirely without form. Here, the text uses the example of "mysterious primordial wondrous Qi" (Xuan Yuan Miao Qi, the Daoist term for the foundational energy constituting all things) to illustrate: when this wondrous Qi manifests as concrete matter, it takes on formal characteristics.

Next, the analogy of "water freezing into ice" is employed to explain: just as ice forms from water without creating something separate from water itself, the appearance of matter results from the condensation of wondrous Qi. However, just as water changes its state when frozen, matter differs from the original quiescent and formless wondrous Qi when it takes shape. Matter emerges due to conditions and dissipates when those conditions cease.

Finally, the text discusses whether the "principle of profound unity" (Xuan Yi Zhi Li, the fundamental principle of the Dao) can be articulated: the Dao itself is singular, yet language is used to describe distinctions. The true essence of the Dao transcends speech—even the concept of "one" is artificially established. When all conceptual distinctions dissolve, even the notion of "one" becomes unnecessary. As the scripture concludes: to name it "one" is already to fall into the limitations of language.

Someone asks: Is this concept of "One" proposed because it needs to be contrasted with other things? Or does it inherently exist without requiring comparison?

The answer is that both interpretations are valid. From the perspective of contrast, this "One" is a name established to explain the principle; without comparison, this "One" is revealed based on the true state of the Dao itself. Speaking of "One" through contrast is meant to manifest the Dao's essence, but the Dao itself doesn’t need names—it is eternally One by nature.

Another question arises: The Dao itself is neither "One" nor "non-dual" by nature; the term "One" is artificially established. Now, to unify all differences, we must rely on the concept of "One" to encompass all things. Thus, we temporarily use "One" to reconcile differences, but once differences dissolve, even the concept of "One" becomes unnecessary.

The response is: The eternally unified Dao inherently requires no name; speaking of "One" is merely for clarification. Once the matter is clarified, even the act of explanation must be relinquished. Words and silence both vanish—why cling to "One"? As the classics say: It is neither expressible in words nor conveyable through silence; truth has its ultimate form. Though words and silence both fall short, how could the Dao not exist?

Someone asks: Why is truth said to be eternally mysterious (Xuan)? The answer: Because truth is separate from concrete things—this transcendent state is called "Xuan."

Question: Then what does "the mystery of mysteries" (Xuan zhi you Xuan) mean? Answer: The first "Xuan" is a name revealed through contrast with concrete things, while the second "Xuan" refers to the naturally mysterious state that requires no comparison. Hence, it is called "the mystery of mysteries."

Question: How can we describe a state of mystery that needs no manifestation? Answer: We can only use words indirectly to point to it.

Question: If words are still used, and words themselves involve contrast, why say it doesn’t require manifestation to be naturally mysterious? Answer: Earlier, when explaining through contrast, words were used to highlight mystery; now, "using words" refers to describing mystery without contrast. Though both employ words, the former is the "One" in a relative sense, while the latter is the "Two" beyond duality—thus "the mystery of mysteries" signifies a higher level of profundity.

Question: Can this state of "the mystery of mysteries" be attained through cultivation? Answer: There are two ways to understand Mysterious Virtue (Xuande): one is to realize it, the other is to practice it.

Realizing Mysterious Virtue means recognizing that ultimate truth, though subtle, is neither complete nor incomplete (as truth itself transcends such distinctions). Practicing Mysterious Virtue means aligning with the mysterious Dao through cultivation, entering the mysterious realm via practice. Both can be called Mysterious Virtue.

Finally, someone asks: When realizing Mysterious Virtue, does this highest state of Xuande itself still require cultivation? Answer: (The original text lacks a response here, possibly discussing the relationship between cultivation and enlightenment.)

This scripture discusses the state of "simultaneous forgetting" (jianwang) and the nature of "Mysterious Virtue" (Xuande) in the process of Daoist cultivation. Before attaining the highest virtue (Xuande), practitioners remain attached to distinctions between "being" (you) and "non-being" (wu). Upon reaching a certain level of practice, one transcends this duality, neither clinging to "being" nor "non-being"—a state called "simultaneous forgetting" (the simultaneous release of opposing concepts).

Someone asks: What exactly must be forgotten to achieve Mysterious Virtue? The response clarifies: The essence of the teaching (jiaoti) encompasses both manifest and hidden aspects. Thus, "simultaneous forgetting" serves to pacify discriminating thought, while "Mysterious Virtue" represents harmony with reality. Authentic teachings are never empty constructs; they must be realized through relinquishing attachments. Before attaining "simultaneous forgetting," people debate interpretations; afterward, all perspectives merge into seamless understanding.

Regarding cultivation practice (xing), the scripture emphasizes embodying the approach of "neither grasping nor rejecting." The Scripture of Marvelous Truth (Miaozhen Jing) states: Without deliberately acquiring vital energy (zhengqi), it naturally endures; without consciously expelling pathogenic energy (xieqi), it spontaneously dissolves—this is the realm of the "Mysterious" (xuan). The natural preservation of vital energy constitutes "Virtue" (De), collectively termed "Mysterious Virtue."

A skeptic questions: If cultivation involves neither grasping nor rejecting, what remains to cultivate? The reply explains: Authentic "forgetting" is itself the practice of non-grasping and non-rejecting. What appears as non-action (wuwei) is precisely the highest action, thereby aligning with the profound Virtue.

Concerning the nature of the Dao: The Dao's essence comprises both "emptiness" (xu) and "form" (you). Yet the Dao itself is neither emptiness nor form, nor some third category beyond them. Just as the four elements (earth, water, fire, wind) constitute the body without being identical to it, the Dao embraces all phenomena while remaining unconstrained by any particular manifestation. This all-encompassing quality is revealed precisely through the duality of emptiness and form—recognizing all things as expressions of the Dao unveils the true meaning of boundless inclusion.

Someone asked: If we say the Dao is "neither non-empty nor non-existent," does this fully describe its essence? The response: Even using six "neither/nor" negations cannot completely capture the nature of the Dao. Because the Dao transcends concepts like "neither empty nor existent," any forced verbal description only distances us from the truth. As the Daode Jing states: "The Dao that can be spoken is not the eternal Dao" — the Dao expressible in words is not the unchanging, constant Dao.

Another question: What then constitutes the essence of the eternal Dao? The reply: It takes as its essence a state beyond "being" (you) and "non-being" (wu) — neither ordinary being/non-being yet encompassing both.

Further pressed: If the Dao cannot manifest in "non-being" nor in "being," and if being and non-being are completely separate, what then governs the Dao? Since it's not a concrete existence, how can it be called an essence? The answer: How can one speak definitively of the eternal Dao? Yet how can one remain silent? Its ineffability means the essence isn't concrete existence; yet we cannot stay silent, so we say being and non-being coexist.

Continuing the challenge: If the essence transcends being/non-being, then logically there can be no essence beyond them. If we say it also encompasses being/non-being, then being and non-being are already distinct — what need is there for an essence? To describe the essence as "neither being nor non-being" while allowing "either being or non-being" seems contradictory. This explanation only deepens confusion.

The response: What could the essence of the Dao possibly exclude? When discussing "being," it never separates from "non-being" — both are fundamentally empty and still. Within this stillness, can the essence be sought externally? From the perspective of being/non-being, the stillness of "non-being" contains "being," and the stillness of "being" contains "non-being." Being/non-being is fundamental stillness — originally unseparated. These two are inseparable; stillness and function coexist. To cling solely to function while denying stillness is to lose the truth. How can limited understanding question the boundless Dao?

Another question: Why speak of being/non-being yet say it's neither? The answer: As the Daode Jing states: "The nameless is the beginning of heaven-earth; the named is the mother of myriad things." The Nanhua Jing (Zhuangzi) likewise says: "The Dao cannot be called being, nor can it be called non-being."

Final question: If "being" can't be called "non-being" and vice versa, how can being/non-being serve as essence while also being neither? The answer: The Dao generates all things, yet heaven (nature) remains serene and indifferent — we cannot call it non-being. Yet this serenity cannot simply be called being, hence "neither being nor non-being." Just as humans have limbs constituting their body, the Dao takes four fundamental attributes (generation, serenity, non-being, non-non-being) as its nature. What's difficult to understand here?

Someone asks: Since the essence of Dao (the Way) is neither being nor non-being, and its name is not fixed, why is it consistently called "Dao"? The answer is indeed so—the name of Dao is inherently unfixed. As the scriptures state: "I do not know its name, so I provisionally call it Dao." The Dao that can be spoken of is not the eternal Dao—how could it be fixed? What is called "fixed" is merely a designation of being or non-being, yet Dao itself transcends such limitations. Because Dao pervades all principles, it can be said to be certain from any perspective.

Another asks: Since the essence of Dao has no fixed name nor unchanging rules, how can one study it? The answer: Precisely because it can be cultivated (referring to Daoist practice), one can attain the state of non-duality. It is not understood through "being" nor through "non-being," but by transcending conceptual labels. Through the name "Dao," one learns, yet ultimately surpasses the name; to comprehend the all-encompassing essence is to grasp these four meanings. This formless essence is our true self—it has no fixed name yet contains all names. Why should it be unlearnable? The questioner has truly touched upon the crux!

A further question: If Dao is said to be completely unobstructed, how should this be understood? The answer must be explained in two aspects: first, through obstructions to clarify unobstructedness, and second, through the essence itself to clarify unobstructedness. The former reveals unobstructedness by breaking through obstacles, while the latter means the essence is inherently and eternally unobstructed—hence it is called unobstructed.

A follow-up: Understanding unobstructedness through overcoming obstacles makes sense, but if the essence is inherently unobstructed, what is there to "pass through"? The answer: The unobstructedness of the essence here refers to its eternally unimpeded nature. Like water and a mirror—even when not reflecting objects, their clarity naturally exists. Or like the nature of fire, which is always hot—does it cease to be hot just because no one speaks of it?

Another question: If the essence is eternally unobstructed and requires no explanation to be so, is this relative to obstructions? The answer: It is both relative to obstructions and transcends this relativity. It is relative because unobstructedness is revealed through specific obstacles, yet the essence itself exists eternally even without obstructions. Though the essence is always unobstructed, without obstacles as contrast, people would struggle to recognize this unobstructedness. Just as without specific obstructions, how could unobstructedness be demonstrated?

Finally, someone raises a doubt: In the material world, being cannot become non-being, nor can non-being become being. Heaven (space) is the most divine, counted among the four great elements alongside earth, water, and fire—yet heaven can never become earth. Dao is similarly categorized among the four, so how can it transcend such limitations? The answer: Though both are called the "four greats," Dao fundamentally differs from ordinary matter...

Heaven and Earth have fixed forms and positions, therefore they cannot transform. Yet the Dao (cosmic origin) permeates all things through its fundamental nature, thus existing everywhere.

Someone asks: Since you say the Dao's essence permeates all, does it encompass every concrete thing and principle? The answer is: It both encompasses and does not completely encompass.

Question: What does this mean? Answer: All phenomena in the world manifest the Dao's body - this is the encompassing aspect. Yet concrete things always have limitations, while the Dao eternally pervades emptiness - this is the non-encompassing aspect.

Question: If we can understand encompassing all things as its essence, how can the non-encompassing part also be considered its essence? Answer: Precisely because the Dao simultaneously possesses both encompassing and non-encompassing qualities, it can both embrace perceptible phenomena and transcend concrete forms to achieve perfect completeness.

Question: If pursuing completeness, shouldn't obstruction also be considered part of the Dao's essence? Why is the Dao always described as permeating? Answer: Using "permeation" to describe the Dao's essence merely illustrates one aspect of its complete nature. Ultimately, the Dao is neither permeating nor obstructing. From a biased perspective, we might say it only permeates; from the viewpoint of concrete things, it may seem only obstructing. In truth, the Dao mysteriously unites with all things - both permeating and obstructing.

The Dao's essence transcends language, utterly silent and profoundly subtle. Its source is difficult to trace, yet actually resides within your heart; its manifestations are easily seen, right before your eyes. With mindful contemplation one can fully understand, while clinging to desires will obscure cognition.

Regarding the Dao's permeating quality, this is explained through both its fundamental nature and pedagogical function. As fundamental nature, the Dao encompasses all things; as teaching method, it emphasizes the permeating aspect. Whether viewing the teaching as manifestation of essence or as pathway to understanding essence, both interpretations are correct. For the Dao simultaneously governs permeation and obstruction while transcending such distinctions - the teaching merely uses "permeation" as metaphor to guide realization.

This dialogue explores the relationship between the "substance of Dao" (the ontological reality of the Way) and its "pedagogical manifestation." It begins by clarifying that while pedagogy cannot exist apart from the Dao's substance, pedagogy itself is not equivalent to the substance. Just as discussing pedagogy inevitably involves the Dao's substance, the pedagogical approach is not the substance itself.

Someone asks: If we say that "comprehension" is good and "obstruction" (lack of understanding) is bad within pedagogy, does this mean we should abandon obstruction to pursue comprehension? The response clarifies that abandoning error to choose what is right naturally leads toward comprehension.

The discussion continues: If the substance of Dao inherently contains both comprehension and obstruction, why advocate abandoning obstruction? The answer explains that from the perspective of Dao's substance itself, there is no cultivation practice to speak of—the notion of "abandoning" arises only within the pedagogical framework. Discussions about comprehension similarly belong to the pedagogical level rather than addressing the substance itself.

The dialogue further analyzes: When discussing "comprehension," we address only comprehension without involving the Dao's substance; when discussing the "substance of Dao," we address only the ontological reality without involving comprehension. Obstruction is neither the Dao's substance nor the pedagogy itself, but rather the content being discussed within pedagogy. Both comprehension and obstruction belong to the scope of pedagogical discussion, yet neither constitutes pedagogy itself.

Finally, it elucidates: Precisely because pedagogy itself is not comprehension, we can distinguish between comprehension and obstruction. In this process of discernment, natural distinctions emerge—when one awakens to their inherent nature and understands principles, pedagogy manifests as comprehension; when one remains stubborn and ignorant, pedagogy manifests as obstruction. Although both comprehension and obstruction are inseparable from the Dao's substance, the substance itself is neither comprehension nor obstruction. This resembles how discussions of Dao's substance employ the concepts of comprehension and obstruction, yet the substance transcends all such distinctions.

This scripture explores the profound philosophy concerning the relationship between the Dao (the Way) and the generation of all things. It first explains the connection between the "substance of Dao" (the essence of the Way) and its "manifestation and concealment" (appearance and withdrawal). The essence of Dao cannot be fully expressed in words, yet its manifestation cannot exist apart from this essence. Just as names and their referents are distinct, they together embody the complete meaning of Dao.

Regarding whether Dao creates all things, there are three levels of interpretation: First, Dao itself is beyond notions of creation or non-creation—its function manifests spontaneously. Second, Dao has no deliberate will to create; all things naturally receive (inherit) the principles of Dao. Third, while things appear to generate themselves, Dao does not actively initiate creation.

The discussion then turns to the question of superiority and inferiority among things: From the perspective of essence, all things share equal intrinsic nature without hierarchy. Yet in concrete manifestations, differences do exist. This is likened to human saliva naturally forming mist and dew of varying sizes—not through deliberate intention. This reveals a crucial insight: Dao treats all things impartially, with differences being merely superficial phenomena.

Finally, the text addresses the issue of nobility and baseness: While social hierarchies exist in human society, from the perspective of Dao, humans and all things are fundamentally equal in essence. Just as north and south differ in direction yet hold equal importance within heaven and earth. The dialogue employs the vivid metaphor of "saliva transforming into mist and dew" to illustrate how Dao's operation maintains unity while displaying multiplicity.

From the perspective of the Dao, all things are fundamentally equal without distinction of nobility or baseness. Yet when viewed through the lens of individual existence, every being considers itself noble while belittling others. As the Zhuangzi states: "Heaven and earth share the same origin with me; all things are one body with me."

Someone might ask: If we speak of essence, all things merge into unity; yet in terms of phenomena, superior and inferior distinctions exist. Since we're discussing the ontological reality that governs both humans and myriad creatures—while in actuality clear differences exist between them—how can we claim they remain perpetually undifferentiated in primordial purity?

The response: What we call "unchanging" refers to the inherent rational essence, while "differences" concern external forms. In terms of physicality, distinctions certainly exist, but ontologically humans and other creatures share the same fundamental nature. Could there exist some independent, unchanging reality beyond humans and creatures? What we term "existence" isn't substantial reality, yet because it manifests truth and reliability, it deserves reverence.

A further question: If all things are equal from the Dao's perspective, yet we clearly experience hierarchical distinctions in reality, are these perceived hierarchies real? Answer: Such distinctions only exist within relative comparisons.

Another inquiry: If all beings consider themselves noble, what makes humans uniquely dignified? Answer: The classics affirm human nobility with good reason—because humans discern good from evil and possess spiritual wisdom. The teaching of "no nobility or baseness" represents the sage's method for educating sentient beings, while emphasizing "human dignity" guides spiritual practice. This resembles how physicians prescribe medicine according to symptoms—teaching must adapt to circumstances without rigid adherence to any single approach.

Finally, regarding the vexation of sentient beings: How do afflictions arise and cease? Answer: Afflictions originate from the Dao and ultimately return to it. Because the primordial substance (hunqu wu) embraces all things, arising and perishing are natural processes of the Dao. (Note: Here "hunqu wu" indicates how the Dao-body contains all complementary opposites—the very manifestation of the Dao consists in these cycles of birth and extinction.)

This passage explores the relationship between the Dao and all things through a question-and-answer format, using salt as a metaphor from daily life: salt emerges from water, yet ultimately dissolves back into water, returning to its source. Someone asks: Why do things come into being only to perish? The response points out that this is the natural transformation process of Qi (the fundamental Daoist concept referring to the energy constituting all things) — when transformation occurs, we call it "birth," and when returning to the source, we call it "extinction."

When questioned about the meaning of this cycle of birth and death, the answer emphasizes that it is a spontaneous process without specific purpose or benefit. Just as we do not know why we are born or why we die, this cycle of birth and death is the manifestation of "naturalness" (ziran).

Regarding the relationship between the Dao's creation of all things and natural laws, the scripture explains that they are fundamentally one. "Creation and transformation" (zaohua) refers to the natural changes of causes and conditions, which never cease. From the functional perspective of creating all things, we call it "zaohua," but in essence, it remains natural transformation. The changes we observe in daily life are called "causes and conditions" (yinyuan); viewed separately, they may seem different, but seen as a whole, they are actually the same.

Concerning modes of cognition, the text proposes three perspectives: ordinary people tend to oppose purity and defilement, thus projecting their "inherent nature" (zixing) beyond material things; those with penetrating understanding can integrate all things, viewing everything as the original substance; the highest state is to regard all things with fundamental equality, where even the concept of "merging into oneness" becomes unnecessary.

Finally, the discussion turns to the issue of "self-awareness": when someone asks about the "self," the "self" is used to answer; if no one asks, then there is no "self" to speak of. The same applies to the concept of "merging into oneness." The reason "pure self-awareness" is considered superior to "awareness of oneness" is that "oneness" is a concept proposed in contrast to differentiation, whereas true "self-awareness" transcends all distinctions.

This passage discusses the relationship between "penetrating insight" (达观) and "primordial unity" (混), progressively deepening through a question-and-answer format.

Someone asks: Is not deliberately distinguishing the state of primordial unity considered penetrating insight? The reply affirms this as penetrating insight. A follow-up question arises: If primordial unity itself constitutes penetrating insight, why designate it separately? The explanation reveals multiple levels of penetrating insight: that which relates to external, superficial phenomena versus that which exhaustively traces back to the fundamental source.

The discussion then turns to the concept of "absolute equality." Some argue only completely undifferentiated primordial unity qualifies as penetrating insight, while any distinction disqualifies it. The response clarifies this depends on perspective: from the standpoint of acquired emotional distinctions, it may be called penetrating insight; but from the perspective of innate absolute equality, it does not qualify.

Further differentiation is made: Penetrating insight manifests in two forms. One concerns the transcendence of specific phenomenal distinctions, while the other represents absolute equality. Though their manifestations differ, both essentially reveal themselves through contrast with superficial cognition. When all distinctions—even the concept of "equality" itself—are completely dissolved, true penetrating insight spontaneously emerges.

Classical references illustrate these three levels: differentiation (myriad phenomena), primordial unity ("there was something formlessly complete"), and equality (where an autumn hair and Mount Tai are equivalent). The ultimate state transcends attachment to even the notion of equality, embodying the classic description: "Looked at but not seen, listened to but not heard."

This discourse unveils three progressive stages of Daoist realization: first recognizing phenomenal distinctions, then experiencing primordial unity, and finally surpassing all conceptual differentiations. Each stage possesses its corresponding "penetrating insight," yet the supreme state abides in naturalness where even the name "penetrating insight" is no longer retained.

The Discourse on the Dao's Essence explores the ontological nature of the Dao (the Way) and its relationship with good and evil. The scripture first clarifies that the Dao's essence transcends sensory perception (as "the formless and silent body"), being quiescent and shapeless, beyond conceptualizations of equality or differentiation.

Regarding the question of good and evil, the text explains: While the Dao's essence encompasses both good and evil, these qualities do not constitute its fundamental nature. Just as trees may harbor insects (the "scorpion"), the presence of insects doesn't represent the tree's intrinsic nature; or like mirrors accumulating rust ("stains"), the tarnish adheres to the surface but isn't the mirror itself. Good manifests the Dao's essence, while evil obscures the truth.

When addressing why one must eliminate evil and cultivate good, the text offers two perspectives: First, the Dao's essence transcends the duality of good and evil; second, its fundamental nature is pure goodness. Spiritual cultivation aims to return to this authentic state. From the Dao's natural perspective, even the concepts of "good" and "evil" don't exist—there's only undifferentiated wholeness beyond all distinctions.

Finally, the scripture elucidates the Dao's essential characteristics: It is neither "being" nor "non-being," yet simultaneously both. This seemingly paradoxical formulation illustrates the Dao's absolute transcendence—it cannot be simplistically defined as existence or non-existence, for it surpasses all dualistic concepts. The true essence of the Dao is the motionless absolute reality.

This passage from the Discourse on the Dao's Essence explores the fundamental characteristics of the Dao. The scripture first cites classical teachings: Before the myriad things took form, the Dao was nameless; only with the emergence of all things did the Dao acquire names.

A question arises: Is the Dao "neither being nor non-being" (fei you fei wu), or is it "both being and non-being" (yi you yi wu)? The response clarifies: The Dao transcends the duality of "being" and "non-being," thus it can be said to be simultaneously "being" and "non-being," while also being "neither being" and "neither non-being."

The discussion continues: The essence of the Dao is singular and undivided, yet for explanatory purposes, it must be spoken of in dualistic terms. The Dao's essence is complete and profoundly meaningful, hence it is called the "essence" (ti).

Another question arises: Between formless emptiness and material reality, which constitutes the Dao's essence? The response explains: From the fundamental perspective, being and non-being are indistinguishable; yet from the phenomenal level, principle (li) and phenomena (shi) always appear separate. Both emptiness and materiality belong to the phenomenal realm, not to the Dao's essence. The Dao's essence encompasses both being and non-being, yet is confined by neither.

The text mentions the "Great Image" (daxiang, referring to the supreme Dao) has no fixed form—it takes the myriad things as its forms. A question follows: Does this mean the supreme Dao is provisional while the myriad things are real? The response clarifies that "real" and "provisional" here carry special meanings distinct from ordinary relative concepts. The essence of all things was originally undifferentiated unity; distinctions only appear through human conceptualization.

The conclusion explains: What we call "reality" is actually a human construct. Terms like "primordial chaos" (hundun) are employed provisionally to guide understanding. The classics state that all such expressions are merely provisional designations meant to help people apprehend the Dao's root. What we conventionally call "real" is ultimately illusory—a false perception born of attachment.