體

What This Concept Is About

"體" (dravya), roughly rendered in plain language, means "substance," "self-nature," or "entity." In the Abhidharma and Yogācāra traditions, it refers to the substantial self-nature of each individual dharma—the ground on account of which a dharma is what it is, a thing is what it is. The trouble, however, is that this term takes entirely different paths in different schools and different treatises. Some treat it as a cornerstone; others treat it as a target. To understand "體" is at the same time to understand a great debate within Buddhism itself.

Let us first sort out the approaches of the three principal source texts.

Vaibhāṣika: Substance Is Ever-Existent, Nature Is Changing

The *Abhidharmakośa-bhāṣya* (阿毘達磨俱舍論) draws a strict distinction between "substance" (體) and "nature" (性). The treatise master says: "許法體恒有，而說性非常，性體復無別" — "It is admitted that the substance of dharmas is eternally existent, yet it is said that their nature is not permanent; nevertheless, nature and substance are not distinct." The meaning of this statement is: the "substance" of a dharma is eternally existent, while the "nature" of a dharma—that is, its self-nature (自性), its function, its appearance—is not permanent. But "nature" and "substance" are not two different things; it is not that there is a nature apart from substance, or a substance apart from nature. They are not two distinct realities; they are simply two ways of speaking about the same matter from different angles.

This distinction is subtle and worth pausing over. In ordinary speech, we tend to split "essence" and "manifestation" into two layers: the essence is unchanging, the manifestations are changing. A diamond, for example, has as its essence the crystal structure of carbon, and as its manifestation the way it refracts light—the angle of refraction can vary with the environment, but the crystal structure itself does not change. But the *Kośa* is not saying this. Its "substance is eternally existent" does not mean that an unchanging thing hides behind changing phenomena; rather, it says: the existence of the dharma itself is eternally present, while its function and appearance—at what time, in what position it manifests, what function it performs—change according to conditions.

This leads to the famous discussion in the *Kośa* concerning the "three times" (三世). Past, present, and future—how exactly are the three times distinguished? The treatise master lists four positions:

- The venerable Dharmatrāta (法救) says "by difference of kind" (由類不同): the substance of a dharma itself undergoes transformation, turning from the future kind into the present kind, then into the past kind. The treatise master judges this to be the view of an outsider (the Sāṃkhya school), because Sāṃkhya also speaks of transformation. - The venerable Guṇamati (妙音) says "by difference of characteristic" (由相不同): each dharma is fully endowed with the characteristics of all three times, only that at one moment the present characteristic appears, at another moment the past characteristic appears. The treatise master says this leads to confusion of the time-phases—if one dharma simultaneously possesses the characteristics of all three times, then to which time does it actually belong? - The venerable Vasumitra (世友) says "by difference of position" (由位不同): the substance of a dharma does not change; only the position of its function changes—when the function has not yet arisen it is future, when the function is arising it is present, when the function has ceased it is past. The treatise master judges this to be the best view. - The venerable Bhadanta (覺天) says "by difference of relation" (由待有別): the three times are relative—relative to the past, the present is future; relative to the future, the present is past. The treatise master says this leads to one dharma simultaneously possessing all three times—because it is simultaneously the future of one dharma, the present of one dharma, and the past of one dharma.

The treatise master's conclusion is: "由位有別非體有異" — the three times are only differences in the position of function, not differences in substance. The substance of a dharma is eternally existent; only the position of its function changes.

There is an important distinction to be seen clearly here: the *Kośa*'s "substance is eternally existent" does not mean that there is an eternal, unchanging soul or entity. It means that the existence of a dharma itself is not increased or decreased with the flow of time—the substance of a past dharma is still present; only its function has passed. This is somewhat like saying: the sentence you spoke yesterday—its "substance" is still present (the sentence was indeed spoken, it did exist), but its "function" has already ended (it is no longer happening). The substance of a dharma is eternally existent, its nature is not permanent—existence does not perish, function is impermanent.

Yogācāra: Substance as a Tool for Analyzing Dharmas

The *Yogācārabhūmi-śāstra* (瑜伽師地論) uses "substance" in a way quite different from the *Kośa*. It is not seeking to establish a metaphysical proposition of "substance eternally existent"; rather, it treats "substance" as a tool, a category, for analyzing dharmas.

The treatise sets out "five characteristics in brief" (略由五相) by which "the principle of distinction among dharmas should be known" (應知諸法差別道理): substance (體), characteristic (相), function (業), dharma (法), and cause-and-effect (因果). Here "substance" is the first characteristic. What does it specifically refer to? The treatise says that "substance" comprises two aspects of characteristics: first, the "self-characteristic" (自體相)—the appearance intrinsic to a dharma's own substance; second, the "distinguishing characteristic" (差別相)—the appearance by which dharmas are mutually distinguished, each different from the others. Taken together, "substance" is used to discern the fundamental ground by which a dharma is this dharma and not that dharma.

This usage is actually quite plain. To know a thing, the first task is to determine what it is—what its own substance looks like, and how it differs from other things. The "substance" of an apple includes its self-characteristic as an apple (round, with skin, with flesh), and also its distinguishing characteristic relative to a pear or an orange (the skin is red or green, not yellow; the flesh is crisp, not soft). Here "substance" is not a metaphysical entity but the first category of epistemology—you must first know what a dharma is before you can discuss its function, its karma, its cause and effect.

The *Yogācārabhūmi-śāstra* also places "substance" at the head of a seven-item sequence: "substance, object, mode of operation, concurrent arising, and distinctions, determination, and circulation" (體、所緣、行相、等起、與差別、決擇、及流轉). The treatise has a line: "體顯現初、門差別後" — "substance manifests first, the gates of distinction come after," meaning that one first lets the "substance" manifest, then discusses its categories and finer distinctions. Substance is the starting point, the foundation.

The *Mahāyānasūtrālaṅkāra* (大乘莊嚴經論) pushes "substance" to a more dialectical level. It makes extensive use of paired formulations such as "having substance / lacking substance" (有體／無體), "real substance / non-substance" (實體／非體), and "lacking substance yet not being non-substantial" (無體非無體). For example, discussing illusion (幻事): "彼事無體故，即得真實境" — "Because that matter is without substance, one thereby attains the real object." It also says that the illusory matter "has manifestation, therefore it can be said to exist; its real substance is unobtainable, therefore it is said not to exist" (有顯現故可說有，實體不可得故說非有), so "having substance" and "lacking substance" are non-dual. This "non-duality" is not a muddled compromise; rather, it means: you cannot say merely that it exists, and you cannot say merely that it does not exist. It has manifestation, so it is not nothingness; it has no real substance, so it is not truly existent. Both statements must be made at once, so that one does not fall into either extreme.

This is, in fact, the core methodology of Mahāyāna Buddhism: not falling into either extreme. Why must one not fall into an extreme? The *Mahāyānasūtrālaṅkāra* gives three reasons: by knowing the absence of substance, one blocks the establishment of the extreme of existence (preventing you from taking things as truly real); by knowing the presence of substance and knowing conventional truth, one blocks the extreme of annihilation (preventing you from negating everything and sliding into nihilism); by the non-duality of the two, one blocks aversion to substance and the retreat from the Great Vehicle into the Lesser Vehicle's cessation (preventing you from falling back because of disgust). You see, here "substance" is no longer a metaphysical entity but a pivot for regulating cognition—knowing existence, knowing non-existence, knowing the non-duality of existence and non-existence: all three levels are indispensable.

Madhyamaka: Substance as the Object of Refutation

The *Mūlamadhyamakakārikā* (中論) takes the most hostile attitude toward "substance." It does not discuss with you what substance is or how substance fares; it directly sets "dwelling in one's own substance" (自住其體) as a fault that must be refuted.

The *Mūlamadhyamakakārikā* takes the relationship between fire and fuel (可燃, 薪) as its topic. If you say that fire and fuel are two different things (mutually distinct), then fire should not need to wait for fuel in order to burn; it should burn constantly. If fire burns constantly, then it "dwells in its own substance and does not depend on causes and conditions" (自住其體，不待因緣)—it abides in its own essence, requiring no conditions whatsoever. But then human effort (the effort of tending the fire, adding fuel) would be in vain: since fire would burn on its own anyway, what would be the point of tending it? Yet "this effort is manifestly present" (是功現有)—human effort does exist and does work: add fuel and the fire burns more vigorously; do not add fuel and it goes out. This empirical fact directly negates the hypothesis that fire and fuel are distinct.

The beauty of this argument is that it does not positively define "substance"; rather, it sets "dwelling in one's own substance" as an impossible state. If a dharma dwells in its own substance, it depends on no conditions, changes with no causal factors, and requires no external effort. But no such dharma exists in reality—fire requires fuel to burn, fuel requires fire to be consumed; the two are mutually dependent, and neither is self-abiding.

So the Madhyamaka position is neither "having substance" nor "lacking substance," but rather: anything posited as "dwelling in its own substance" is an untenable attachment. D- dharmas have no self-substance obtainable—not because they do not exist, but because their mode of existence has never been "self-abiding"; it has always been "dependent on other" (依他).

Summary: One Word, Three Usages

The word "體," in the Vaibhāṣika context, is positively established—the substance of dharmas is eternally existent, the nature is not permanent; in the Yogācāra context, it is instrumental—substance is used to analyze dharmas; in the Madhyamaka context, it is negatively refuted—self-abiding substance is a mistaken construction. The same word, three directions. You cannot take only one.

This is precisely the core tension of the concept "體": it is both the basic unit by which Buddhism analyzes dharmas (Vaibhāṣika, Yogācāra) and the attachment that Buddhism ultimately dismantles (Madhyamaka). Using "substance" to understand the world is the entry level; using "substance" to see through the world is the advanced level. The two are not contradictory but are different stages on the same path of practice.

A Clarification Regarding "Substance-Function Theory" (體用論)

"Substance" also has a completely different usage that must be singled out. In the Chinese Buddhist tradition, particularly in schools deeply influenced by Chinese culture (such as Huayan and Chan), "substance-function" (體用) is an extremely important category—"substance" refers to the serene, quiescent original nature or fundamental essence, and "function" refers to manifestation and operation in accordance with conditions. Examples include phrases such as "以體起用" (arising function from substance) and "攝用歸體" (gathering function back into substance).

This sense of "fundamental essence" (本體) is not the same as the Abhidharma's sense of "dharma-substance" (法體), nor the Madhyamaka's sense of "dwelling in one's own substance" (自住其體). The former is metaphysical ontology (the ultimate ground of all dharmas in the universe); the latter two are substance in the epistemological or dharma-characteristic sense (the specific referent of a dharma). The source materials explicitly state that this sense is treated separately under the entry "本體" and is outside the scope of this article. But the reader should know: when you read in Chan literature of "substance and function are non-dual" (體用不二), that "substance" is not the same concept as the "substance" of "the substance of dharmas is eternally existent" in the *Kośa*. Do not conflate them.

A Walk-Through in Daily Life

Let us run the concept of "substance" through contemporary life.

Scenario One: You Are Scrolling on Your Phone on the Subway

You are on your commute, the carriage is crowded, the signal is intermittent. You open a short video, watch three seconds, find it boring, and swipe away; you open another, watch ten seconds—somewhat interesting—but the thumbnail of the next video has already caught your attention. You keep swiping.

Now ask: this "phone" you are scrolling—what is its "substance"?

The Vaibhāṣika school would tell you: the dharma-substance of the phone is eternally existent. This does not mean your phone will never break—of course it will. But the dharma "phone," its existence itself, is not increased or decreased by your scrolling, locking the screen, or charging it. Its "nature"—the brightness of the lit screen, the sound of the speaker—is impermanent: the brightness will cease, the sound will stop, but the substance of the dharma does not change with these changes in function.

How is this to be understood in contemporary life? It is not saying that you possess an "eternal, unbreakable phone"—that would be soul-theory, not Buddhism. It is saying: in every moment you experience, the substance of the fact that "this is happening" is determinate—you are indeed scrolling on your phone; this fact does not become non-existent because you swipe away a second later. Every past moment is "eternally existent"—they did exist, and this "having existed" itself does not disappear. But their "function" has already ceased—the stimulation of that short video has passed; you are already watching the next one.

The Yogācāra school would tell you: the "substance" of the phone must be viewed from two aspects. The self-characteristic: it is a rectangular electronic device, with a screen, a chip, a battery; the distinguishing characteristic: it is different from a computer (a computer is not put in a pocket), different from a book (a book does not light up), different from a person (a person does not charge). You use "substance" to discern: this is indeed a phone, not something else.

Then the question comes: the short video you swiped away—what is its "substance"? You only watched three seconds; you cannot even say what its content was. But its "substance" is determinate—it is a video that indeed exists, with its self-characteristic (duration, images, sound) and its distinguishing characteristic (it is different from other videos). You swiped it away, but its substance did not disappear—it is still on the server, and others can still scroll to it.

The Madhyamaka school would ask you: you say you are scrolling on your phone—are the phone and you two mutually distinct things? If so, the phone should be able to scroll on its own without your operation—but it cannot; you must swipe with your finger, look with your eyes. If it is you "dwelling in your own substance" who scrolls—then you should be able to scroll without the phone—but you cannot; without the phone, you cannot scroll. So you and the phone are neither identical nor distinct. Your scrolling is co-produced by you, the phone, the signal, the content, your attention, your fatigue at this moment. No single party is self-abiding.

Scenario Two: You Work Overtime into the Night

You work overtime until 11 p.m.; you are the only one left in the office. You stare at the computer screen, your eyes dry, your mind running through tomorrow's presentation again and again. You say to yourself: "I am so tired."

What is the "substance" of this "tiredness"?

The Vaibhāṣika school would say: the substance of tiredness is real—today you did indeed work twelve hours; this fact does not disappear because you say "I should not be this tired." But the nature of tiredness—that specific, present-moment feeling—is impermanent. At one moment you may be exhausted to the limit, but the next moment you see a funny message and the tiredness temporarily recedes; then you think of tomorrow's presentation and the tiredness surges back. The function of tiredness changes, but the dharma-substance of "you worked for a long time today" is eternally existent.

The Yogācāra school would say: the dharma "tiredness" must be discerned through its self-characteristic and distinguishing characteristic. Self-characteristic: it is a state of exhaustion of body and mind, including heavy eyelids, scattered attention, low mood. Distinguishing characteristic: it is different from "sleepiness" (sleepiness is a pure need for sleep; tiredness is a comprehensive feeling of excessive depletion); it is different from "aversion" (aversion is not wanting to do something; tiredness is being unable to do it). Only when you discern clearly the "substance" of "tiredness" do you know how to handle it: is it sleep (handling sleepiness), rest (handling tiredness), or changing jobs (handling aversion)?

The Madhyamaka school would ask: this "tiredness"—are you tired, or is tiredness in you? Are you and tiredness two mutually distinct things? If so, tiredness should be able to exist without you—but apart from your body and brain, tiredness cannot be spoken of. If it is you dwelling in your own substance who are tired—then you should be able to be tired without working twelve hours, without sleep deprivation, without prolonged sitting—but you cannot. So you and tiredness are mutually dependent: you create tiredness, and tiredness is shaping you. The you of this moment is already "the you who has been tired."

Scenario Three: You Quarrel with Your Partner

You and your partner quarrel. At the most intense moment, the other person says something especially hurtful. You freeze, then say: "You've changed. You weren't like this before."

This sentence conceals a presupposition about "substance": you believe the other person has a "former" substance, and that substance was good, gentle, considerate; and now he/she seems to have swapped in a different substance, becoming a different person. You treat the "person" as something that dwells in its own substance—he/she should remain unchangingly in that "good" state.

The Vaibhāṣika school would say: the dharma-substance of a person is eternally existent—he/she is indeed still he/she, not someone else. But his/her "nature"—self-nature, function, appearance—is impermanent. The anger of this moment, the hurtful words spoken now, are all manifestations of his/her nature under specific conditions. These manifestations will pass, but the dharma-substance of "he/she is he/she" does not change because of this quarrel.

The Yogācāra school would say: you must discern the "substance" of the dharma "person." Self-characteristic: he/she has his/her temperament, habits, experiences; distinguishing characteristic: he/she is different from others, and different from the self of three years ago. This "difference" does not mean his/her substance has changed; it means his/her distinguishing characteristic has changed—compared with the past, some cracks have been added, some patience has diminished.

The Madhyamaka school would ask: you say "you've changed"—who changed, you or he/she? If the "you" in "you've changed" dwells in its own substance, then "change" is impossible—what dwells in its own substance does not change; what changes does not dwell in its own substance. Every reaction of his/hers is co-produced by your relationship, his/her level of fatigue, his/her lifelong experiences, and your present context. There is no "he/she" that exists independently of all of this.

Where People Most Often Mis-Map

The most common error is understanding "substance" as "soul" or "unchanging essence." When you say "the substance of dharmas is eternally existent," people think Buddhism acknowledges an eternal soul; when you say "dharmas have no substance," they think Buddhism is nihilism. Both understandings are wrong.

"Substance" is not a soul—it is not a thing hidden in the body that goes elsewhere to be reborn after death. "Substance" is the existential ground by which a dharma is what it is. It is not a "thing" but a way of expressing "existence."

"Substance" is also not "essence"—not an unchanging thing beneath the flux of phenomena, like the core revealed after peeling an onion. "Substance" and "nature" are not two distinct realities—substance is the substance of nature, nature is the nature of substance; it is not that one hides beneath the other.

The second common error is understanding the Madhyamaka "refutation of substance" as "substance does not exist." What Madhyamaka refutes is "dwelling in one's own substance"—it refutes the postulate of independence from causes and conditions, of self-standing existence. It does not negate phenomena—fire does burn, you are indeed tired, the phone is indeed being scrolled. What it negates is that these phenomena have a self-abiding, condition-independent ground of existence.

Why Contemporary People Need It

Contemporary people have a deep predicament: we are afraid both of not having "substance" and of having "substance."

We are afraid of not having "substance" because we crave certainty. We hope to have a stable core—a "true self" unaffected by external influences; we hope others have one too—so that their behavior can be predicted, can be trusted; we hope the world has one—so that everything has meaning and order. When we feel "I have no self" or "I don't know who I am," we become anxious.

We are afraid of having "substance" because we know that "substance" implies responsibility and limitation. If I have a fixed "substance," then I am this kind of person, and cannot change—this is despairing. If the other has a fixed "substance," then he/she is this kind of person, and will not change—this is infuriating. If the world has a fixed "substance," then everything is fated, and effort is meaningless—this is nihilistic.

The concept of "substance" happens to address both fears at once.

The Vaibhāṣika's "substance eternally existent, nature not permanent" tells you: you have your substance—you are not nothingness, you are not drifting with the current; but your nature is changing—you are not fixed. Your "existence" is determinate, but your "appearance" is not.

The Yogācāra's "substance" as an analytical tool tells you: you must first know what you are—your self-characteristic and your distinguishing characteristic—before you can discuss anything else. One of the biggest problems of contemporary people is that we are too eager to change ourselves, yet we do not know what the "self" to be changed actually is. You must first discern where the substance lies, then discuss categories and distinctions.

The Madhyamaka's refutation of "dwelling in one's own substance" tells you: you do not need a "true self" that is independent of all conditions, self-sufficient, in order to live. You think you need a self that "dwells in its own substance" to stand firm in a changing world—but the *Mūlamadhyamakakārikā* tells you that the self-abiding substance is precisely what cannot stand. Fire does not dwell in its own substance yet can burn; fuel does not dwell in its own substance yet can be consumed—you do not need to dwell in your own substance in order to live.

Placed together, these three layers form a complete sequence of practice: first use "substance" to establish that you exist (Vaibhāṣika), then use "substance" to discern what you are (Yogācāra), and finally let go of the attachment to "dwelling in one's own substance" and see your own dependent origination (Madhyamaka). Each step handles one layer of fear.

Contemporary algorithmic life also provides an interesting point of reference. Does your "account" on social media—your avatar, your username, your posting history—count as your "substance"? Algorithms will tag you: you are a "cat person," "tech-interested," "emotionally volatile." This tagging process is very much like what the Vaibhāṣika calls "the substance of dharmas is eternally existent"—the algorithm determines that you have certain stable attributes and predicts your behavior accordingly. But you know you are not like that—your "nature" is changing: today you like cats, tomorrow you might be allergic to cats; today you follow tech, tomorrow you might want to escape all screens. The limitation of the algorithm lies precisely in its mistaking "nature" for "substance"—it treats those impermanent, shifting preferences as your permanent attributes.

This analogy can help us understand the distinction between "substance" and "nature," but it also has its limits: the algorithm's misidentification of "substance" is a technical limitation—it is just that the data are insufficient, the model is not good enough; Buddhism's refutation of "dwelling in one's own substance" is a cognitive revolution—it requires us to fundamentally let go of our grasping at a "fixed self-substance." The two are not on the same level.

Common Misreadings and Clarifications

Misreading One: "Substance" is the soul.

No. A soul is a substantialist concept—it refers to an eternal, unchanging, independent spiritual subject. "Substance" in the Vaibhāṣika is the ground of a dharma's existence; in the Yogācāra, it is an analytical tool; in the Madhyamaka, it is the object of refutation. At no level is "substance" used as a soul. Saying "the substance of dharmas is eternally existent" does not mean there is an eternal soul in saṃsāra; it means the existence of a dharma itself is determinate.

Misreading Two: "Substance" is essence.

This misreading needs care. If "essence" means "that which makes a thing what it is," then the Yogācāra's "self-characteristic" does have something of this meaning. But the Vaibhāṣika explicitly says "nature and substance are not distinct"—substance and nature are not two things, and there is no sense of an "essence" hidden beneath "phenomena." The Madhyamaka thoroughly rejects essentialism of any kind—"dwelling in one's own substance" is precisely the core postulate of essentialism. So you cannot loosely say "substance is essence."

Misreading Three: "Having substance" and "lacking substance" are contradictory propositions.

The *Mahāyānasūtrālaṅkāra* repeatedly says "having substance is precisely lacking substance" (有體即無體) and "substance and non-substance are non-dual" (無體體無二)—not a logical contradiction, but two facets of cognition. The illusory matter has manifestation, therefore "exists"; the illusory matter has no real substance, therefore "does not exist." The two statements speak of different levels. You see a thing manifesting—this is "having substance"; you investigate its real substance—unobtainable—this is "lacking substance." Both levels hold simultaneously; there is no contradiction.

Misreading Four: Madhyamaka says "no substance," therefore nothing exists.

This is the biggest misreading. What Madhyamaka refutes is "dwelling in one's own substance"—it refutes the postulate of "independent of causes and conditions, self-standing existence." It does not refute phenomena—fire burns, people get tired, phones get scrolled; these all exist. What it refutes is that these phenomena have a "self-abiding" ground. No self-abiding substance does not mean no phenomena; on the contrary, precisely because there is no self-abiding substance, phenomena can arise in dependence on causes and conditions.

Misreading Five: The "substance" of "substance-function theory" (體用論) is the same as the Abhidharma's "substance."

No. The "substance" of substance-function theory is ontological—the ultimate ground of all dharmas, the serene original nature. The Abhidharma's "substance" is dharma-characteristic—the concrete substance of a particular dharma. The two use the same Chinese character but belong to completely different philosophical problems. The source materials explicitly state that the former is treated under the entry "本體." When reading Buddhist literature, pay attention to the different meanings of this term in different contexts.

The concept of "substance," in the final analysis, is a question mark about "existence." It is both the starting point of our understanding of the world—you must first know what a dharma is before you can discuss anything about it—and the end point of our letting go of attachment—you must see clearly that no dharma dwells in its own substance. The Vaibhāṣika establishes substance, the Yogācāra uses substance, the Madhyamaka refutes substance—the three schools are not mutually contradictory doctrines but successive scenery on the same road. First you establish, then you use, then you refute. Refutation is not negation—refutation is penetration.

Like the you scrolling on your phone: you are indeed scrolling—this is your substance; what you scroll through changes, your attention changes, your emotions change—this is your nature; and the act of "scrolling" cannot be separated from the phone, the signal, the content, your finger, your eyes, your fatigue—no single link dwells in its own substance. You exist, you are changing, you are not independent. Three sentences are simultaneously true. This is what "substance" wants to tell you.