What This Concept Is Actually Saying
When you look at the world — at yourself this morning versus yourself last year, at the phone in your hand versus the coffee cup beside it — there seems to be something obvious going on: *things differ*. One thing is not another thing. One moment is not another moment. This-this-this-ness-of-things and that-that-that-ness-of-things is, for most of us, among the most unquestionable facts of experience. We build our identities on it. "I am X, not Y." "That was then, this is now." "We are different from them."
In Buddhist technical language, this felt fact of difference has a name: 異相 (*anyathālakṣaṇa*) — literally "otherness-characteristic," the *mark* (相) by which something is recognized as *other* (異) than something else, or as *varied* (異) from its own prior state. The Chinese term covers two intertwined senses that English splits awkwardly: (1) the change within a single thing over time (the baby becoming a toddler becoming an elder), and (2) the distinction between two things (this cup versus that bottle). Both senses share the same logical structure: *A is not B* — whether A is the past self and B the present self, or A is you and B is me.
Here is where most readers stop, and where 《中論》 (*Mūlamadhyamakakārikā*, Nāgārjuna's Verses on the Middle Way) begins.
The MMK does not deny, at the conventional level, that we experience change and difference. Of course the baby becomes a person, of course this is not that. What it does is something more surgical: it takes the *mark of otherness* as an object of investigation and asks, layer by layer, whether 異相 can be established on its own terms. Can "being-other" stand as a self-sufficient feature of things? Can "this" and "that" be pinned down by a definite characteristic that does not borrow from somewhere else?
This matters because, if 異相 could be established — if "the mark of being different" were a real, self-standing property — then every changing thing and every pair of things would have a fixed self-nature (自性). The baby would have to remain a baby, because anything with a fixed mark of *being-itself* cannot genuinely become something else. Conversely, if 異相 cannot be established as an independent feature, then *this-versus-that* is not a bedrock fact of the universe; it is something that arises dependently and cannot bear the weight we usually put on it.
The MMK's verdict, stated in a famous condensed verse:
「異中無異相，不異中亦無；無有異相故，則無此彼異。」 *"Within otherness there is no otherness-mark; within non-otherness there is none either. Since there is no otherness-mark, there is no this-versus-that difference."*
This is not a poetic flourish. It is the conclusion of a careful dismantling. Let's walk through the dismantling's main hinges.
The Six Hinges of the Argument
(1) 異相 and 合相 (otherness and union) eat each other. The text asks: how do two things come together — say, the eye and the form seen, the self and the defilement? For there to be a *union* (合) of two, the two must already be distinct from each other; you cannot merge what was never two. But for there to be *otherness* (異), you need two endpoints that could in principle be brought together. The MMK points out that anyone who first appeals to otherness to ground union, then appeals to union to ground otherness, is reasoning in a circle: each one presumes the other, neither can get started. Two marks that each require the other cannot establish themselves.
(2) Abiding and ceasing cannot self-abide or self-cease, nor can they do so through "other." Look at a thing that seems to be *staying the same* — sitting, standing, a flame held steady, your name unchanged for sixty years. Is it abiding by its *own* characteristic (自相住)? Then it would be permanent and unconditioned, which contradicts the obvious fact that everything we experience arises and passes. Is it abiding through a *different* characteristic (異相住)? Then some other mark must be supporting the abiding, and that other mark needs another to support it — the regress of needing yet another — and meanwhile the "other mark" itself depends on still another thing being other-than-it, so it isn't decisive anyway. The same double-check applies to ceasing (滅): does a thing cease by its own mark, or by another? Both options fail. The takeaway: abiding and ceasing cannot be pinned down by any self-standing characteristic.
(3) Variation itself shows no fixed nature. Here the MMK uses the most concrete example it can: the infant becomes a crawling child becomes an elder. If the infant already had a fixed, decided self-nature, this sequence would be impossible — the infant would just stay an infant forever. The fact that we *do* see variation in a single continuum is precisely the sign that no fixed mark of "being-itself" inhabits the continuum.
But — and this is the second move — the text immediately blocks a common escape route. Someone hearing "no fixed nature" might think: "Aha, so there *is* a fixed *non*-nature." No: if there is no root, you cannot posit a fixed mark of *being-without-nature* either. The very absence of self-nature is itself without self-nature.
The opponent then presses: "If there are changes, there must be some 'thingness' underlying them. What is it that changes?" The MMK examines whether the changer and the changed are the *same* thing (壯 *self-becomes* 老) or two *different* things (壯 is changed *by* 老). "If the strong one does not make the old, and the old does not make the strong, then there should be no otherness, and all things have no fixed determination." Both options — same-thing-self-changing, or other-thing-causing-change — fail on inspection.
(4) The mutual distinction between things is unobtainable. Consider the trio of *seeing*, *the seen*, and *the seer*. We habitually say the seer "takes on" an otherness-mark in relation to what is seen. The MMK examines whether this *taking-on* can happen: can the seer grasp an otherness-mark? Can the seen grasp one? Can one know the other? "Otherness does not know otherness, and otherness is not known by otherness either." Without something to be grasped and a way of grasping it, there is no actual differentiation established.
The text then uses two of its most famous illustrations to make the point vivid:
- The house (舍) and its beams (梁椽). A house exists in dependence on beams, rafters, tiles, walls, the ground it stands on. The beams rot, and the house is no more. The house has no independent existence over and above its causes; it cannot, therefore, be set up as an "other thing" that stands wholly apart from those causes. Its otherness is not self-standing. - The fist (拳) and the five fingers. A fist is not some entity added to the five fingers; it is *what the five fingers are doing together*. Pull the fingers apart and there is no fist. The fist cannot be treated as a separate substance that can then stand in opposition to, say, a bottle. Its "this-versus-that" status depends entirely on a configuration that is itself dependent.
(5) The central condensed statement (already quoted above). Within an already-differentiated thing, no separate "mark of differentiation" needs to be added — if the thing were genuinely other, that fact of otherness already does the work. Within something not-other, you cannot introduce an otherness-mark without turning it into something other. Both locations fail. So there is no independent, totalizing characteristic that could ground the move from "this" to "that."
(6) Extension to arising and ceasing (成 and 壞). The same double-check applies to *becoming* and *ending*. If arising and ceasing are *one* thing, then by having different characteristics and different names they would in fact be two, contradicting oneness. If they are strictly *different* things, then they lack relation and causal basis, contradicting their appearance as paired aspects of one process. The pattern of the argument — one option fails, the other option fails — repeats throughout.
A Note on Terminology
The MMK uses a small family of overlapping terms, and distinguishing them helps:
- 異相 — the *mark* or *characteristic* (相) by which otherness is known. The Chinese term carries both senses: (i) the mark of being *varied* or *different*, contrasted with 自相 (self-characteristic); (ii) "by means of another characteristic" — as in 異相住, 異相生, 異相滅 (abiding/ arising/ ceasing through-another), which is interchangeable with 他相. - 異 — bare "otherness" or "difference," often paired with 一 (oneness). - 異法 — "an other-thing," an already-differentiated entity that 異相 presupposes. - 合相 — the mark of *union* / *combination*; the structural counterpart of 異相. - 自相 — self-characteristic; what a thing would have to possess if it possessed its own fixed nature.
A useful shorthand: *異法* is the already-distinct thing; *異相* is the *feature* by which we recognize it as distinct; *合相* is the mark by which we recognize that two distinct things have come together. The MMK shows these three presuppose one another circularly.
生活里的走查 (Walking It Through in Contemporary Life)
Most of us never say the word "異相." But we live inside its assumptions all day. Let's walk through a few ordinary scenes and see where the MMK's analysis lands.
Scene 1: The Resume and the Mirror
You open your résumé to update it for a new job. The "Summary" section still says you are "a strategic, decisive leader." But over the past year, you've been spending most of your work hours listening — to colleagues, to clients, to your own hesitations. The résumé version of you and the morning version of you seem to differ.
The MMK's move: The *fact* of difference between "strategic, decisive you" and "listening, hesitating you" is not in dispute. What is being investigated is whether the *mark of being-different* can be pinned down as a real feature of either version. The MMK would press:
- Does the strategic-self *self-abide* as strategic? If yes, why did the listening-self emerge without violation? - Does it abide *through another mark* — i.e., is your identity being held up by some outside prop (the title, the old résumé, others' expectations)? Then the mark of identity depends on that prop, not on you. - The two versions are not two separate entities facing off (the fist and the five fingers); they are configurations of the same continuum (the house and its beams). The résumé cannot be set up as a self-standing "other thing" against your present behavior, because the résumé itself was composed by this same listening-and-deciding continuum at an earlier time.
You can still revise the résumé. The point is not paralysis but precision: *which* "you" is being asserted, and on what basis? The MMK loosens the grip of the assertion, not the activity of revising.
Scene 2: "I Used to Love This"
A friend says, "I used to love hiking, but now I don't." The past self (loving hiker) and the present self (homebody) are experienced as two distinct things. There is a felt *異相* between them.
The MMK's move: The MMK does not deny that preferences change. It asks whether the *mark of being-other* between past-you and present-you can be established.
- Are they the *same* thing that has self-changed? Then the "hiker" mark and the "homebody" mark are both features of one continuum, and neither stands as a self-defining characteristic of *you* (壯不作老, 老亦不作壯). - Are they *two different* things — past-you and present-you — and one caused the other? Then we need to find what made the change, and that maker needs its own conditions, regressing. - Either way, the felt mark of "past-me-vs-present-me being two different things" cannot be located as a self-standing feature. The grief or relief that hangs on the change — "I'm not who I was" — loosens when the mark of otherness cannot be self-established. The continuity is not denied, but its rigid partition into "two selves" is not affirmed either.
A small but consequential shift: instead of *being* someone who used to love hiking, you are *a process through which* hiking-loving arose and faded. The process is real. The "someone who used to" is a useful conventional shorthand, but the MMK asks us not to mistake the shorthand for a metaphysical claim.
Scene 3: Us and Them
A team at work splits into two camps over a strategic decision. People start saying, "We are the people who value X; they are the people who value Y." The *異相* between the two groups feels sharp, almost ontological: *they* are not *us*.
The MMK's move: The text on 異相/合相 is directly relevant here. For "us and them" to come into opposition (合), the two must already be distinct (異). But the distinctness — the very mark by which each side knows itself as not-the-other — is something the *opposition* itself produces. The team's division generates the felt otherness; the felt otherness is then used to justify the division. The text's diagnosis of circularity applies here with uncomfortable precision.
The MMK is not telling the team to pretend they agree. It is asking them to notice that the *mark of otherness* on which they are grounding their identities is itself constituted by the very disagreement it is being used to explain. The fist-analogy is useful: "our side" and "their side" are not two pre-existing fists that then come into opposition. They are configurations of overlapping team members, overlapping concerns, overlapping data — configurations that have hardened into apparent fists.
Scene 4: The Brand and the Knockoff
A consumer looks at a luxury handbag and a near-identical-looking one at a tenth of the price. They are physically almost the same. The *mark of otherness* — what makes them different things, what makes the first cost ten times more — turns out to be a logo, a story, a guarantee, an authentication card. Remove those props, and the mark of otherness collapses.
The MMK's move: This is almost a literal dramatization of 異相住/異相生. The "premium-ness" of the bag does not *self-abide* (the leather, the stitching, don't carry the premium on their own). It *abides through another mark* — the logo, the boutique, the brand story, the resale market. The text's question applies cleanly: what is *that* mark abiding through? Another prop. Regress. The MMK is not denying the price differential exists conventionally; it is asking what kind of feature is doing the work of "marking this as other," and showing that no such self-standing feature can be located.
Scene 5: Grief Over Who Someone Used to Be
A daughter watches her father age into dementia. "He's not himself anymore." The *異相* between the father-she-knew and the father-now is the source of grief.
The MMK's move: The baby-to-elder example from the text is built precisely for this. *If the infant had a fixed self-mark, it would never become the elder.* The presence of variation is, the text says, precisely the sign that no fixed self-mark inhabits the continuum. That does not dissolve the grief. It does, however, reframe it. The "himself" being mourned was never a self-standing thing that is now gone; it was a configuration of the same continuum that is now configuring differently. The configuration-shift is real and can be deeply painful. The metaphysical claim — that there *was* a self-standing "himself" that has now been lost — is what the MMK asks us to set down.
Why Contemporary People Need This
Why bother with such an abstruse technical term? Because the unexamined assumption that *異相* is a self-standing feature of things is doing enormous work in modern life, and most of it is invisible.
Identity as fixed essence. Our culture — therapeutic, career-oriented, brand-saturated — encourages us to *have* an identity: introvert, extrovert, creative type, analytical type, "branding yourself" on LinkedIn. Each of these identity-claims rests on a quiet 異相 — a mark of "this is who I am, *not* who I am not." The MMK's analysis does not say you cannot have a personality or a self-conception. It asks whether the *mark of being-different-from-other-personalities* can be self-established. The honest answer, after the analysis, is: no, it cannot. Which is not a loss but a relief. The mark of "being an introvert" is not a metaphysical fact about you; it is a useful conventional pointer, dependent on context, configuration, growth, exhaustion, the people in the room. Treating it as a fixed essence creates suffering when the configuration shifts (a new job, a new loss, a new relationship) and the essence seems to *betray* us.
Us-vs-them thinking, at every scale. From household arguments to team conflicts to political polarization to international hostility, the felt *mark of otherness* between groups does enormous causal work. The MMK's structural point — that otherness and union mutually presuppose, that each cannot ground the other without circularity — is not a metaphysical curiosity. It is a description of how group-identity feedback loops actually function. The *otherness* between groups is produced by the *union* of each group against the other; the *union* of each group is held together by the felt *otherness* from the opposite group. Neither one is foundational. Both are mutually constituting. Seeing this structure is the beginning of working with it skillfully, not by pretending groups don't differ but by refusing to treat the mark of difference as a metaphysical given.
Anxiety about change. "I used to be X, now I'm Y" — this is a 異相 claim about oneself over time. The MMK's analysis of the壮/老 case (壯不作老, 老亦不作壯) loosens the grip of the reified self that supposedly *became* something else. The reified self is what makes change feel like loss, betrayal, or failure. With the mark of self-otherness loosened, change can be recognized as *what was already happening*, not as something that happened *to* a fixed self.
Consumer and brand differentiation. Modern economies run on the engineering of perceived 異相 — between products, between lifestyles, between status tiers. The MMK's structural point about 異相/合相 (the brand's premium is constituted by the comparison, the comparison is constituted by the brand's premium) is, at scale, the structure of the entire market. This is not a moral condemnation. It is a description of how the mark of otherness functions: it cannot stand on its own; it is produced in the very act of comparison.
Grief, identity, and care. As in Scene 5, the felt 異相 between "who someone was" and "who they are now" can harden grief into a metaphysics — the loss of a *real self*. The MMK offers, instead, the recognition that the continuum was always changing, the mark of "the real self" was never self-standing, and presence with the person-now is not a betrayal of the person-then.
Common Misreadings and Clarifications
Misreading 1: "The MMK denies that things differ." No. The MMK operates within the framework of two truths (世俗諦 and 勝義諦). Conventionally, things differ, change, and stand in relation to one another. What is denied is that the *mark* of differing can be established as a self-standing feature (自性) of things. To say "things differ" is a useful conventional truth; to say "things *have a mark of being-different* that is *itself* a thing" is what the text dismantles. If you find yourself reading the MMK as flat denial of difference, you have not understood what is being interrogated.
Misreading 2: "異相 is the same as 異." Close, but not identical. 異 is the bare fact of otherness/difference; 異相 is the *mark or characteristic* by which otherness is recognized. The MMK's whole investigation turns on this difference (so to speak): it accepts that there is 異 at the conventional level and investigates whether 異相 can be pinned down. In the phrase 異相住 ("abiding through another mark"), the 異相 is doing very specific work — it is the *means* by which abiding is supposed to happen, not the *fact* of otherness.
Misreading 3: "異相 is the same as 異法." Again close but distinct. 異法 is "an other-thing," an already-differentiated entity. 異相 is the *feature* by which an 異法 is recognized as such. The MMK's verse 「異中無異相」means: within an already-differentiated thing, no separate "mark of differentiation" needs to be added. The two terms are paired, with 異相 presupposing 異法 as its logical condition.
Misreading 4: "異相 is just another name for 自相." The opposite. 自相 is *self*-characteristic — what a thing would have if it possessed a fixed self-nature. 異相 is *other*-characteristic — what is involved when a thing is recognized as different from another, or as different from its prior state. The MMK's whole move is to put them side by side and show that neither can do its claimed work. 自相住 is rejected because it would make things permanent; 異相住 is rejected because it requires an infinite regress of supporting marks. They are structural counterparts, not synonyms.
Misreading 5: "If 異相 doesn't stand on its own, then nothing differs, and we are back to a featureless oneness." This is the confusion the MMK is at pains to head off in section (3) above. The *absence of a self-standing mark of otherness* is itself not a self-standing mark. The text is not swapping one metaphysical absolute for another (difference-as-essence for sameness-as-essence). It is showing that the entire framework — "things have self-standing marks" — is the assumption that needs re-examination. What remains after the examination is not nothing and not undifferentiated oneness; it is the conventional flow of arising, changing, relating, and ending, *unconstrained by the demand that they be backed by self-standing features*.
Misreading 6: "This is just nihilism about identity." A subtle one. The text's conclusion — that 異相 cannot be self-established — can sound like "there is no real identity, so anything goes." But the dismantling is of the *mark* of identity-as-different, not of identity-as-functioning-convention. You can still function with a self-conception, a name, a personality, a history. What you cannot do is treat any of those as a self-standing metaphysical fact about an independently existing self. The difference matters. The first leaves you functional and unburdened by the metaphysical claim; the second dissolves the functioning too.
Misreading 7: "Neuroscience has now confirmed that 異相 is just a brain construction." A word of caution. Contemporary neuroscience does show that our sense of self-versus-other is constructed, context-dependent, and subject to revision. This is *concordant* with what the MMK is pointing out, but it is not the same claim. The MMK's argument is not that *the brain* constructs the mark of otherness (which would be a *psychological* claim); it is that the mark of otherness cannot be self-established even *as a feature of the thing itself*, independent of any mind constructing it. The neuroscientific finding operates at a different level — describing the mechanism of construction, not the ontological status of the constructed. The two can be in harmony, but they are not interchangeable. To say "neuroscience proves Madhyamaka" is to mistake the level of the claim.
A Final Image
The MMK on 異相 is, at its heart, a piece of *precise un-asking*. We are so habituated to *this-vs-that* being a fact about the world that we don't notice we are doing the asking. The text's gift is to make the asking visible, and then to show — gently, through layered argument rather than assertion — that the question cannot be answered on the terms in which it was posed.
It is not asking us to *stop seeing* differences. It is asking us to stop *positing a self-standing mark* as the basis for the seeing. That move — small in words, large in implication — is what the verse 「異中無異相，不異中亦無」is for. Not a denial. A letting-go of the demand that difference have a metaphysical floor.
Once that demand is let go, the world does not become featureless. It becomes uncompelled.