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可相

可以名相描述或标示者。AI-generated

Type ViewDifficulty IntermediateTruth-level span I · dependent arising ⇢ III · nominal designationInitial AI estimate · evolves with use

可相为名相所标示者,第三重正面确立『名言假有』即其本位读法,非遮破

A Contemporary ReadingAI-generated

What This Concept Is Really Saying

可相 (lakṣya, often rendered in English as "the characterizable," "that which is characterized," or "the characterized object") is the companion term to (lakṣaṇa, "characteristic" or "mark"). Together they form a pair that Buddhist philosophy, especially the Madhyamaka (中觀) tradition, uses as a hinge for understanding how anything ever becomes "a thing" at all — and how, on closer inspection, no thing ever really stands on its own.

The core passage from 《十二門論》 (Śāstra of Twelve Gate-Treatises, T1568) puts it with quiet precision:

「以相故知是事名可相。」 *That which can be known through its characteristics is called 可相.*

And 《中論》 (Mūlamadhyamakakārikā / Treatise on the Middle Way, T1564) gives the working definition in a single phrase:

「可著名物。」 *What can be named is called a "thing."*

Put these two together and you have the architecture: 可相 is the thing-as-known-through-its-marks; 相 are the marks-by-which-a-thing-is-known. Neither one precedes the other in a strict sense — and that is precisely where the philosophical weight falls.

The Mutual Dependence Structure

This is not a one-way relationship where characteristics belong to a pre-existing object like ornaments on a tree. It is a mutual conditioning (因待). The 《中論》 states this bluntly:

「相、可相、常相,因待故。」 *Characteristic, characterizable, and the constant characteristic — all exist through mutual dependence.*

And again:

「因相有可相,因可相有相,輾轉相待。」 *Because of characteristic there is the characterizable; because of the characterizable there is the characteristic — they depend on each other in turn.*

This "in turn" (輾轉) is not a casual word. It signals that if you try to find a starting point — *which came first, the mark or the thing?* — the analysis breaks down on both sides.

The Twin Examples: Cow, Elephant, Horse

The classical texts don't leave this abstract. They give us concrete, almost rustic examples that were meant to stop the philosophizing mind in its tracks and point at something you already do without thinking.

The cow (from 《中論》): > 「有峰角、尾端毛、頸下垂𩑶故名牛。」 > *Because of the peaked horns, the tuft at the tail's end, the dewlap hanging beneath the neck, it is called "cow."*

Take away the horns, the tuft, the dewlap — and the word "cow" has no purchase. Not because the animal vanishes, but because the pointing-out function of the word has lost its anchor.

The elephant and the horse (from 《十二門論》): the elephant has twin tusks, a long trunk, three bumps on the head, scoop-shaped ears, a curved-spine back. The horse has upright ears and four equal hooves. In both cases, *離此諸相更無象可被相所相* — apart from these characteristics there is no elephant that can be characterized. And in the case of a *無相事* (a thing with no characteristics), there is likewise nothing for characteristics to apply to.

This last clause is important: the argument works on both ends. A thing with no characteristics cannot be picked out at all — it drops out of language. And a thing with only characteristics, never unified into a "thing," is equally incoherent.

Mutual Characteristic: Smoke and Fire

One of the loveliest moves in the 《中論》 is the smoke-and-fire example:

「一切法皆攝在相、可相二法中,或相為可相、或可相為相。如火以烟為相,烟亦復以火為相。」 *All dharmas are subsumed under these two — characteristic and characterizable. Sometimes the characteristic is the characterizable, and vice versa. As fire takes smoke as its characteristic, smoke in turn takes fire as its characteristic.*

This demolishes the naïve picture where "characteristic" and "thing" are tidy ontological categories — a mark belongs to a substance, a substance wears marks. Instead, what counts as a "characteristic" and what counts as a "thing" can swap roles depending on context. Fire is the mark by which you know there's smoke; smoke is the mark by which you know there's fire. Neither is prior.

The Double Negation

Now the philosophical knife comes out. The 《中論》 performs a clean symmetrical cancellation:

「相法無有故,可相法亦無;可相法無故,相法亦復無。」 *Because characteristic does not exist in itself, characterizable does not exist; because characterizable does not exist, characteristic also does not exist.*

And the closing verse:

「是故今無相,亦無有可相;離相可相已,更亦無有物。」 *Therefore there is no characteristic, no characterizable; apart from characteristic and characterizable, there is also no "thing."*

The third line is the one to sit with: 離相可相已,更亦無有物 — apart from the pair, there is no "thing" either. "Thing" (物) is itself a designation made possible only by the operation of the pair. Strip the pair away, and the noun "thing" dissolves.

Three Wrong Pictures, Three Refutations

The 《十二門論》 is unusually patient with its opponents. It lists three common ways people try to rescue a more comfortable picture — where either the pair is identical, or utterly different, or partially overlapping — and disposes of each one carefully.

1. 相即可相 (characteristic = characterizable) *E.g., "the characteristic of consciousness is consciousness itself; apart from the consciousness used, there is no consciousness."* This is refuted with an image so immediate it almost hurts: > 「凡物不能自知,如指不能自觸,如眼不能自見。」 > *No thing can know itself. A finger cannot touch itself; an eye cannot see itself.*

If characteristic and characterizable were identical, the thing would have to be its own mark — but nothing can perform that trick. The finger meeting itself requires another finger; the eye seeing itself requires a mirror. The line 「若因果為一,而實因果不一」 adds a second blade: even granting identity, it would collapse cause and effect into one, which observation contradicts.

2. 相異可相 (characteristic ≠ characterizable) *E.g., "the cessation of desire is called nirvāṇa," not "desire is the characteristic of nirvāṇa"; or "faith has three marks… it is a mental factor, included in the aggregates of formation."* If they are utterly different, then you need another characteristic to characterize the characteristic — and another for that — leading to an infinite regress: 「相更復應有相,此事不然」 (a characteristic should again have a characteristic; this does not hold).

3. 可相少分為相 (a portion of the characterizable is the characteristic) *E.g., "right view is a characteristic of the path, and is a portion of the path"; "arising, abiding, ceasing are the characteristics of conditioned things, and are portions of conditioned things."* This view secretly re-imports either identity or difference at a smaller scale — and since those have already been refuted, this one falls with them.

The Lamp Analogy and Its Self-Contradiction

An opponent offers a clever image: "Just as a lamp can illuminate itself and also illuminate another, so a characteristic can characterize itself and another." The 《十二門論》 answers coolly: this analogy has already been broken when analyzing the three marks of conditioned things (生住滅, arising/abiding/ceasing); and besides, the opponent has just contradicted himself — earlier he said characteristic and characterizable are different, now he says the characteristic can characterize itself. You can't have both.

Where This All Lands

The pair 相/可相 is not an end in itself. It is a tool for one specific operation: showing that the way things "are" for us — as identifiable, nameable, characterizable items — has no bottom. 《中論》 closes with:

「可著名物…性空寂滅相。」 *What can be named is called "thing"… characterized by the nature of empty quiescence.*

And 《十二門論》 with:

「相、可相空故,一切法皆空。」 *Because characteristic and characterizable are empty, all dharmas are empty.*

So 可相 is not just one term among many. It is the moment when ordinary recognition — *oh, that's a cow, that's a friend, that's an electron, that's a memory* — is taken apart and shown to be a delicate, mutually-supporting construction with no independent ground under it.


Walking Through It in Contemporary Life

Let's trace 可相 through a single ordinary scene, and then through several others, mapping each step carefully onto the classical structure.

Scene 1: Identifying Someone at a Coffee Shop

You're looking for a friend. You scan the room.

The marks (相): a green jacket, a slight limp, reading a paperback with a yellow spine, a habit of tapping the foot.

The thing-being-identified (可相): "my friend Anna."

Now read the analysis carefully:

1. The "thing" only arises as your friend in virtue of the marks. No green jacket, no limp, no book, no foot-tapping — no "Anna" as the person you're waving at. This is exactly the cow's horns and dewlap. The marks are not decorations on a pre-existing Anna; they are the operational handle by which "Anna" is picked out *as the person you're picking out*.

2. The marks are only "marks of Anna" in virtue of Anna. A green jacket in a department store window is not a mark of Anna. A paperback book on a subway seat is not a mark of Anna. They become her marks *only because they belong to the context of being-her*. Strip the friendship out — out goes the function. This is the mutual conditioning (因待): 因相有可相,因可相有相。

3. The marks can themselves be picked out by further marks — and that process has no end. The "green" of the jacket is established by contrast with the gray wall; the "limp" by comparison to an imagined un-limp; the "yellow spine" against the off-white cover. Each mark needs other marks. This is why 《中論》 refuses to let either pole stand alone.

4. The "self-knowledge" check fails. Can Anna be her own characteristic? She can't walk into the room and see herself-as-Anna-being-picked-out-by-you. She needs your eyes. This is the finger-cannot-touch-itself move.

5. Now the deeper move: ask whether there is an "Anna" you could encounter *without* any marks. The texts say no — not because Anna doesn't exist as a person, but because the operation "Anna as identifiable object of recognition" cannot run without the pair. 離相可相已,更亦無有物.

This is the heart of the teaching, and it is gentle. It is not saying your friend is an illusion. It is saying that the mode of her being-for-you-as-identified-thing is a mutually-supporting construction.

Scene 2: The Email from Your Boss

You receive a message. You identify it as "angry."

Marks (相): short sentences, a period where there would normally be a comma, the absence of greeting, "please" replaced by "kindly."

Characterizable (可相): the email as angry.

The same architecture runs. The "anger" of the email isn't some hidden substance inside it that the marks merely report on. The anger *as anger-for-you* only takes shape via the marks, and the marks only count as marks-of-anger via the larger context of how your boss writes. Take the same words from a different sender, in a different context, and they might register as efficient, or tired, or just clipped. What counts as a mark of anger depends on the characterizable; what counts as an angry email depends on its marks.

Common misstep: people often say "the words are just neutral text; I projected the anger onto it." That's one reading, but it misuses the framework. The point isn't that the words are projections and the anger is fake. It's that *the anger-as-identified-in-the-words* and *the words-as-carrying-anger* arise together — neither is more real than the other.

Scene 3: Your Job Title on LinkedIn

You are listed as "Senior Product Manager."

Marks (相): the words "Senior," "Product," "Manager"; the bullet points of past experience; the endorsements.

Characterizable (可相): you-as-the-Sr-PM.

What is most striking here is how the mark and the thing genuinely swap roles — exactly the smoke-and-fire pattern. Your job title is what you present to the world as your identifying mark (相); but it is also what your actual daily activity instantiates as the thing-being-identified (可相). "Senior PM" is your mark on a business card; "Senior PM" is the role your workdays fill out. 火以烟為相,烟亦復以火為相.

Now, the LinkedIn profile is also an object lesson in mutual conditioning through designation: if you change one bullet, the whole thing shifts; remove the title and the bullets become hard to parse; remove the bullets and the title becomes a hollow sound. The pair holds together or falls together.

Scene 4: The Misclassification Trap

A common mis-mapping happens with physical recognition: you see someone across the street and call out to "Anna" — but it's not Anna. Here the failure is instructive. The marks (green jacket, paperback) were insufficient to establish the characterizable (Anna). They were Anna's marks in *some* contexts but not this one. This shows that the relationship is context-bound — there is no airtight, context-independent proof that a given cluster of marks picks out a given thing. The 《十二門論》's warning about *無相事* (things with no characteristics) is, in modern terms, the worry about under-described or unrecognizable cases.

Where the Walk-Through Goes Wrong If You Don't Watch It

The single most common mistake is to read 可相 as "the thing-in-itself" — some hidden, solid substrate that sits beneath the marks and owns them. This is exactly what the texts are refusing. The cow is not "really a thing underneath that has horns." It is "thing-and-horns together, neither prior." If you let 可相 collapse into a reified essence, you have lost the teaching.

The second mistake is to read it as a kind of "subjective idealism" — *I construct the thing by my labels*. That collapses into the first mistake in reverse. The marks are not yours alone; they include Anna's actual limp, the boss's actual typing rhythm, the actual job responsibilities. The mutual dependence is between mark and thing, not between mind and world.


Why Contemporary People Need This

The teaching of 可相 addresses a very modern condition: the inflation of identity-things. We live in a culture that constantly asks "what is this thing, really?" and treats the answer as if it should be a stable, nameable, ownable core. *What is my job, really? What is this relationship, really? What is my gender, really? What is this country, really? What is this mental state, really?* Each of these is treated as a 可相 — a thing — that should have its characteristics cleanly listed and nailed down.

The Madhyamaka move says something almost radical in its quietness: every such "thing" is held together by the marks you use to pick it out, and the marks are only marks because of the thing you pick out. There is no under-layer to find. This is not a counsel of despair — it is a release from the exhausting project of finding the final definition. Once you see the mutual-dependence structure, the panic to "really know what X is" loses some of its grip. The cow is still a cow. You still milk it. But the metaphysical hunt for the Cow-Itself is recognized as a category error.

There are also specific contemporary resonances:

- In product design and AI, we constantly encounter the smoke-and-fire pattern. A "feature" of a product is what characterizes the product; the product is what makes the feature a feature. Try to design one without the other, and you get vaporware or feature-creep. The mutual-dependence analysis is exactly what product teams often fail to learn, and it shows up as a kind of organizational suffering.

- In identity politics and self-understanding, the pair offers a way to honor both that "I am X" is meaningful (because the marks and the thing genuinely co-arise and have real effects) and that "I am X" is not the end of inquiry (because the X-as-fixed-thing is empty of independent existence). Many contemporary debates go in circles because one side insists on the thing, the other on the marks, and neither sees the mutual dependence.

- In mental health discourse, especially around diagnostic categories: depression, anxiety, ADHD are at one level useful characterizations (相) of patterns of suffering (可相); but the suffering is also what makes the patterns count as those particular patterns. Treating either pole as primary — "you really have this thing" or "it's just labels" — falls into one of the three refuted views. The most workable clinical posture often unconsciously mirrors the Madhyamaka one: hold the diagnosis lightly, work with the marks, keep checking what you're actually dealing with.

- In the practice of meditation, 可相 shows up directly. A meditator might try to find the "self" behind the breath, behind the sensations, behind the thoughts. Each time they look for a characteristic (相) they think will point to a finder (可相), they cannot locate one. The mutual-dependence analysis gives a philosophical map of why this search always comes up empty — and why the emptiness is not a failure but a finding.


Common Misreadings and Clarifications

Misreading 1: "可相 is just 'the object itself' / 'the referent'."

This is the most common Western importation from naive realism. In English philosophy, "the characterized object" sounds like the thing-in-the-world the description refers to. But the 《中論》's closing line — 離相可相已,更亦無有物 — explicitly denies that this referent has any existence apart from the characterizing operation. 可相 is not a substrate; it is the characterizable-as-picked-out.

A helpful analogy that does *not* go too far: in some readings of quantum mechanics, an "observable" has no determinate value until a measurement (which itself depends on a setup, which itself depends on what's being measured). The bare "object as it is before measurement" cannot be cleanly specified. This is *analogous*, not equivalent, and contemporary physics is still contested on exactly how far to press such analogies. The Buddhist point is made on logical grounds, not empirical ones.

Misreading 2: "相 is just 'appearance' and 可相 is 'reality behind appearance'."

This comes from the Platonic-Christian habit of taking "appearance vs. reality" as the master pair. In Buddhist philosophy, that habit is precisely what is being unwound. The 相 is not a veil over a deeper 可相; they co-arise. To treat them as appearance-vs-reality is to sneak in a hidden 可相 behind the 相 — exactly the refuted position of "相即可相" with the added error of hierarchy.

Misreading 3: "This is just nominalism — things are just names."

Not quite. Nominalism says the names are conventions and the things are conventions-of-conventions. The Madhyamaka analysis goes further: it asks what makes a name work as a name of *this* thing rather than *that* thing — and finds mutual dependence at every level. Names are part of the system, but so is what gets named; the analysis refuses to grant priority to either pole.

Misreading 4: "If there's no 可相 standing alone, then nothing exists and the world is an illusion."

This is a misreading of "emptiness." The 《十二門論》's closing line — 相、可相空故,一切法皆空 — does not say "nothing exists." It says "no dharma exists with the kind of self-standing nature we tend to assume." Cow's horns, dewlap, tuft — these still function. Milk still comes out. The emptiness is of the independently-existing characterizable, not of the operational, recognizable, milkable cow. 日常的牛不空;空的是「離相而獨存的牛」。

Misreading 5: "相 is one, 可相 is many — like Form and Particulars in Western metaphysics."

Tempting, but a trap. The 《十二門論》 explicitly refutes the one-many relation between them: 相及與可相,一、異不可得 (one and difference both cannot be established). Importing the universal/particular pair smuggles in a separate Form which is exactly the 常相 (constant characteristic) that 《中論》 lists alongside the pair to say 因待故 (it too is dependently arisen, not a Platonic Form).

Misreading 6: "可相 = the object of cognition, 相 = the act of cognition."

This collapses a structural pair into a cognitive-act pair. 相 is not the *act*; it is the *characteristic*. The finger-cannot-touch-itself argument is precisely aimed against making 相 into a self-acting cognition: it shows that if characteristic = characterizable, the act would have to be its own object, which nothing can do.

Misreading 7: "This is just epistemology — a theory about how we know."

It touches epistemology, but its main work is ontological: it concerns how things *are*, not merely how we grasp them. The double-negation conclusion is about the way things exist (or fail to) in themselves, not about the limits of our knowledge. Saying "we can't know the thing-in-itself" is a Kantian move that still leaves the thing-in-itself as a limiting concept. The Buddhist move refuses even that — there is no thing-in-itself to fail to know.


A Note on the Texts

The two principal sources — 《中論》 attributed to Nāgārjuna, translated by Kumārajīva (鳩摩羅什) around the early fifth century, and 《十二門論》 also attributed to Nāgārjuna, likewise via Kumārajīva — handle 可相 with slightly different vocabulary but identical architecture. 《中論》 uses the cow and the smoke-fire examples; 《十二門論》 uses the elephant and horse and walks through the three refuted positions in more detail. Both arrive at the same place: 相 and 可相 are empty of self-standing nature, and therefore all dharmas are empty.

A well-known later line — though from a different text — that catches the same insight at the level of felt experience is from the 《金剛經》 (Diamond Sūtra):

「凡所有相,皆是虛妄。若見諸相非相,則見如來。」 *All characteristics are illusory. If one sees that characteristics are not characteristics, one sees the Tathāgata.*

The 《金剛經》's 凡所有相 here corresponds to the same 相 the 《中論》 is dismantling. The phrase 若見諸相非相 is precisely the double-negation insight: seeing characteristics as not-characteristics (and, by extension, characterizables as not-characterizables, things as not-things).

This is the deep dignity of 可相 as a concept: it is not an obscure scholastic term. It is the moment of recognition turned back on itself, shown to be a delicate, mutually-supporting, ultimately ungroundable dance — and it is that very ungroundability that the tradition points to as freedom.

Canonical EntryAI-generated

一、定义与核心要义

可相(lakṣya),指可由「相」(lakṣaṇa)加以识别、施设名言之事法本体。「可相」与「相」在中观学中被作为相互依待的一对范畴加以考察:《中論》明示「可著名物」,即可被施设名称者即名为物;《十二門論》明示「以相故知是事名可相」,即能因相而了知者即名为可相。两经皆以此对范畴为论证枢纽,归结一切法空。

二、主要阐述

(一)以特征名言识别可相 《中論》以牛为喻:有峰角、尾端毛、颈下垂𩑶等特征即名「牛相」;离此诸相则无牛可被指认,正是在诸相之依待中,可相——牛本身——方得以成立。《十二門論》亦以象、马为喻:有相事中,如象之双牙、长鼻、三隆头、箕耳、弯弓脊;马之竖耳、四同蹄;离此诸相更无象可被相所相;无相事中亦无可施相者。

(二)相与可相相互依待、毕竟空寂 《中論》反复申论「相、可相、常相,因待故」,并明示二者「共相因待」:因相有可相,因可相有相,辗转相待。偈颂更作双遣:「相法無有故,可相法亦無;可相法無故,相法亦復無」。偈云「離有相無相,餘處亦不住」,排除可相作为独立实体之可能;归结「是故今無相,亦無有可相;離相可相已,更亦無有物」。《十二門論》以偈总括:「相及与可相,一、異不可得;若無有一、異,是二云何成?」 长行再申:若一不可得,异亦不可得,是二则不成,故相、可相皆空;相、可相空故,一切法皆空。

(三)一切法摄入相、可相二法 《中論》明示:「一切法皆攝在相、可相二法中,或相為可相、或可相為相」,以烟与火互为相为喻:「如火以烟為相,烟亦復以火為相」。「相、可相決定不可得。是二不可得故,一切法皆無」。

(四)破三种异说 《十二門論》详列论敌三种立场并逐一破斥: 1.「相即可相」(如「识相是识,离所用识更无识」):以「凡物不能自知,如指不能自触,如眼不能自见」为喻破之;又若因果为一,而实因果不一,故此说不然。 2.「相异可相」(如「灭爱名涅槃」而非「爱是涅槃相」;又如「信者有三相……是心数法故行阴所摄」):若异,则「相更复应有相」,坠入无穷,此事不然。 3.「可相少分为相」(如「正见是道相,于道是少分」;「生、住、灭是有为相,于有为法是少分」):此义或在一中、或在异中,一异之义先已破故,少分相亦破。

(五)灯喻之破 论敌以「灯能自照亦能照彼」喻「相能自相亦能相彼」,《十二門論》先指此喻已于「三有为相」(生、住、灭)中破,次责其自违——前既言相、可相异,今又言相能自相,前后相违。

(六)归趣性空 《中論》以「性空寂滅相」结摄可著名物、著名业等诸法。《十二門論》则归结「相、可相空故,一切法皆空」。

三、不同部类与译本的表述差异

1. 喻例不同:《中論》以牛为喻(有峰角、尾端毛、颈下垂𩑶等),《十二門論》以象、马为喻(象之双牙、长鼻、三隆头、箕耳、弯弓脊;马之竖耳、四同蹄)。

2. 互为相之喻:《中論》明出烟与火互为相之喻(「如火以烟為相,烟亦復以火為相」);《十二門論》未出此喻。

3. 术语差异:《十二門論》以「色阴、行阴」(用「阴」字)而非常用之「色蕴、行蕴」之「蕴」;以「心数法」称相应心所(如「信者有三相……是心数法故行阴所摄」);以「有相事」「无相事」对举。《中論》之术语则与中观学一般用语一致,未见其他异名。

4. 别门之释:《十二門論》以「灭爱」释涅槃相,以「生、住、灭」为有为三相;《中論》则未见此类释例。

四、与相关概念的关系

1. 与「相」(lakṣaṇa):「相」为能指认之具,「可相」为被指认者,二者相互依待、互为成立条件。《中論》言「相、可相、常相,因待故」,《十二門論》言「以相故知是事名可相」。

2. 与「物」:《中論》以「可著名物」为释,即可被施设名称者即名物。

3. 与「空」(śūnyatā):可相与相之自性皆不可得,由此归结一切法空。《中論》云「相、可相決定不可得。是二不可得故,一切法皆無」;《十二門論》云「相、可相空故,一切法皆空」。

4. 与「自性」「实有」:《中論》既以「性空寂滅相」结摄诸法,又以「相、可相決定不可得」遮遣二者之实存。

五、代表性原文引用

1. 《中論》:「有峰角、尾端毛、颈下垂𩑶故名牛……相、可相、常相,因待故。」 2. 《中論》:「相法無有故,可相法亦無;可相法無故,相法亦復無。」 3. 《中論》:「是故今無相,亦無有可相;離相可相已,更亦無有物。」 4. 《中論》:「一切法皆攝在相、可相二法中,或相為可相、或可相為相。如火以烟為相,烟亦復以火為相。」 5. 《中論》:「可著名物……性空寂滅相。」 6. 《十二門論》:「以相故知是事名可相。」 7. 《十二門論》:「相及与可相,一、異不可得;若無有一、異,是二云何成?」 8. 《十二門論》:「凡物不能自知,如指不能自触,如眼不能自见。」 9. 《十二門論》:「相、可相空故,一切法皆空。」

By SutraAI-generated

中論T1564 · 中觀部

《中論》論「可相」,主要以「相、可相」一對概念之相互關係為論述核心。「可相」意指可被「相」(特徵、表相)所描述、所標示之對象。

一、以譬喻明相與可相不可分離。經中舉牛為例:有峯、有角、尾端有毛、頸下垂𩑶,是名牛相;若離是相則無牛,無牛則諸相無所住。是故於無相法中相則無所相,有相中相亦不住(先有相故);如水相中火相不住,先有自相故。離有相、無相,更無第三處可為可相,故偈云「離有相無相,餘處亦不住」。

二、相與可相互為因待,不可單獨得。經文明言:「因相有可相,因可相有相,共相因待故」。相無所住故則無可相法,可相法無故相法亦無。偈頌總括此義:「是故今無相,亦無有可相;離相可相已,更亦無有物」。

三、由此推及一切法皆攝於此一對概念之中。經云:「於因緣中本末推求,相、可相決定不可得。是二不可得故,一切法皆無。一切法皆攝在相、可相二法中,或相為可相、或可相為相」,並以火以烟為相、烟亦以火為相為喻,顯二者互為能所、相依而立。

四、在〈如來品〉中,「可相」之義與「可著」「可名」並列互訓:「可著名物,著者名作者,著名業,所用法名所用事,是皆性空寂滅相」。此處以可著、可名、可相同舉,顯示凡可被標示、可被描述、可被著稱者,其性皆空寂滅。此與前述「相、可相」一對在論證層次上有所不同——彼從因待明無,此從可名可著明性空,但同歸諸法實相不可得。

綜觀全經,《中論》論「可相」之獨特處在於:(一)以「相、可相」並舉為基本分析框架;(二)以日常譬喻(牛之諸相、火烟互為表徵)展開論證;(三)由相、可相二者之不可得推向「一切法皆無」之結論;(四)並於〈如來品〉中與可著、可名互訓同用,皆歸於性空寂滅之相。經中所用術語為「相、可相」,與其他經論或以「能所」「所相」等名相異,於此當依此經原稱記錄。

十二門論T1568 · 中觀部

《十二門論》論「可相」,核心在於透過「相」與「可相」關係的全面檢擇,證明二者俱空,從而推展到萬物、我皆空。

一、可相的定義與成立條件

論中給出可相的基本定義:「以相故知是事名可相」——一個事物之所以被稱為「可相」者,是因為有「相」(形象、標誌、屬性)作為認知依據。因此,可相必然依相而立,二者是因與果、能知與所知的關係。

二、從「相無所相」推向「可相不成」

論主先以象、馬為例破「相能有所相」:如象之雙牙、垂鼻、三隆頭、箕耳、彎弓脊等,若離開這些相,「更無有象可以相相」;馬亦復如是。進一步推論:若法先有相,則「更何用相為」;若有相事中相得相,則有二相之過(先有相,後又有相來相之);無相之事亦不能由有相之相去描述,因為「何法名無相而以有相相?」結論是:「離有相、無相,更無第三法可以相相,是故相無所相。」相既無所相,以相而立的可相也就無法成立。

三、一、異二門之辯

偈頌明示:「相及與可相,一、異不可得;若無有一、異,是二云何成?」此後展開詳細問答。對方提出三種可能的成立方式:

1.「相即可相」:如識相是識、受相是受。論主以「指不能自觸、眼不能自見」為喻,說明凡物不能自知,故相非可相;且若二者為一,則不應作相與可相之分別,因果也將成為一。

2.「相異可相」:如「滅愛名涅槃」。論主指出,若說「愛是涅槃相」則可說相、可相異,但對方說的是「滅愛是涅槃相」,故不成;又若相異於可相,則此相還需另一相來說明,導致無窮之過。

3.「可相少分為相」:如正見是道相(少分)、生住滅是有為相(少分)。論主認為此說或落於「一」或落於「異」,而一、異二義先已破,故少分相亦破。

最後總結:「更無第三法成相可相,是故相、可相俱空。」

四、破燈喻

對方再以「燈能自照亦能照彼」喻「相能自相亦能相彼」。論主答:此喻在「三有為相」(生、住、滅)中已破;且對方先說相、可相異,後又說相自相彼,自相矛盾。

五、歸趣

論末將可相之空上升為萬物皆空:「相無所相故,可相法亦不成……相、可相空故,萬物亦空。何以故?離相、可相,更無有物……物、無物空故,一切有為法皆空;有為法空故,無為法亦空;有為、無為空故,我亦空。」可相之空被作為整套空觀的關鍵支點。

六、術語形式

《十二門論》使用「可相」一詞,未見「所相」「性相」等其他譯名異稱。文中以「有相事、無相事」作分類,並以「有為法、無為法」連結更廣的空性範疇;採用問答體(問曰/答曰)夾偈頌的論書格式,屬中觀部典型體裁。

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