Dharma · AI Companion

本生

jātaka

记述佛陀过去世修行的故事。AI-generated

Type GenreDifficulty IntroductoryTruth-level span outside the four-fold two-truths frameworkInitial AI estimate · evolves with use

A Contemporary ReadingAI-generated

A quick framing before the four sections, because this term is a famous trap. When contemporary readers see 本生 in a Chinese Buddhist text, the mind usually jumps to the *Jātaka* — those warm narratives about the Buddha's past lives, where a deer or a rabbit or a previous Buddha does something noble, and the present Buddha explains that this was "him" in a former birth. That is one use of 本生 (in compounds like 本生经, 本生谭). It is the *wrong* use for this text. In Nāgārjuna's 中论 (*Mūlamadhyamakakārikā*) and 十二门论 (*Śataśāstra*), 本生 is an abstract analytical term paired with 生生, doing very precise philosophical work. The whole essay below is about *that* technical sense — not the stories.


What this concept is saying

The basic pair: 本生 vs 生生

In Nāgārjuna's analysis, "arising" (生, *utpāda*) is not a single, self-evident event. It is a process that can be picked apart, and the analysis splits it into two complementary moments:

- 本生 (běn shēng, "original / primary / root arising") — the initial, first moment when something supposedly comes into being. The "supposed start" of an event. - 生生 (shēng shēng, "arising-upon-arising" / "subsequent arising") — the arising that follows, the way the arising itself re-arises or continues in each successive instant; "arising of arising," the way a flame keeps re-igniting, the way a process keeps producing itself moment by moment.

In ordinary speech we happily say "the meeting started at 3 PM" — we treat the start as a single identifiable thing. The Madhyamaka analysis asks: what actually is this supposed "first arising"? And how does it relate to the way the meeting, once "started," keeps re-arising moment by moment?

The mutual-dependency structure

The classical verse, found in both 中论 and 十二门论, lays out the basic structure:

「生生之所生,生於彼本生;本生之所生,還生於生生。」

— *What is produced by 生生 is produced by 本生; what is produced by 本生 is, in turn, produced by 生生.*

The analysis is putting forward an *interlacing* structure. Every candidate "original arising" (本生) is itself already dependent on a prior "continued arising" (生生), and every candidate "continued arising" is itself dependent on an "original arising" that supposedly undergirds it. They refer to each other; they presuppose each other. You cannot fix one as the absolute producer (能生) and the other as the absolute produced (所生); they are mutually conditioning.

This is not a metaphysical claim about the universe actually containing two kinds of arising. It is a *diagnostic move*. The moment you try to locate a self-existing "first arising," you discover you needed a "continuing arising" to even give it meaning; and the moment you try to explain the "continuing arising," you end up appealing to some "original arising" that supposedly initiated it. The pair holds each other up — and, importantly, holds nothing up, because each one's status as a self-subsisting event is itself unsettled.

The two-pronged refutation

The analysis then dismantles the natural assumption that one of the pair is the producer (能生) and the other is the produced (所生). It runs the argument in *both* directions.

Prong 1: Dismantling "生生 can produce 本生." If you claim that the "continued arising" (生生) is what produces the "original arising" (本生), you face this problem: 生生 itself is described as *arisen from* 本生 (生生从本生). A thing that has itself been produced — how can it suddenly turn around and be the producer? It is caught in the role of "that which is produced" and cannot at the same time be the unconditioned source. The 中论 sharpens it: "生生未有自体,何能生本生" — 生生 has no self-existence; how could it produce 本生? You cannot pour from an empty cup.

Prong 2: Dismantling "本生 can produce 生生." Symmetrically: if you claim that the "original arising" (本生) is what produces the "subsequent arising" (生生), then 本生 itself is described as *arisen from* 生生 (本生从彼生). A thing that has itself been produced — how can it be the producer of 生生? The 十二门论 puts it bluntly:

「生生法應生本生,是故名生生;而本生實自未生,云何能生生生。」 — *生生 is called 生生 precisely because it should produce 本生; but 本生 itself has not actually arisen — how could it produce 生生?*

Both directions collapse. Neither of the pair can hold the throne of "the producer."

The "moment of arising" sub-analysis (the 生时 layer)

The 中论 adds a further, particularly sharp layer, focused on the *instant* (生时) when arising is supposedly happening:

- If at the moment 生生 is supposedly producing 本生, then at that very moment 生生 is in the process of arising — it is not yet fully established (生生尚未有). A not-yet-fully-existing thing, how could it produce? - Symmetrically: if at the moment 本生 is supposedly producing 生生, then at that very moment 本生 is not yet fully established (本生尚未有). How could it produce?

This is a beautiful double bind. You cannot appeal to "the thing as it is right now" because the supposed "right now" is precisely the moment when the thing has not yet stabilized into a producer. This is structurally reminiscent of Zeno's paradoxes, but it is doing different work. It is not denying motion; it is showing that "arising" cannot be grasped as a self-subsisting event with a clear identity, even at the very moment we think we have caught it.

The seven-fold expansion in 十二门论

The 十二门论 goes further than 中论 in offering a systematic scheme. When a dharma (法) is in the process of arising, the text says, seven aspects are involved:

「一法,二生,三住,四灭,五生生,六住住,七灭灭。」

— *One, the dharma itself; two, its arising; three, its abiding; four, its ceasing; five, the arising of its arising (生生); six, the abiding of its abiding (住住); seven, the ceasing of its ceasing (灭灭).*

In this scheme, 本生 (the original arising) is said to produce six of the seven — everything except itself. 生生 produces 本生, and 本生 in turn produces 生生. The same logic is extended to "abiding" (住) and "ceasing" (灭): there is 住住 ("the abiding of abiding") and 灭灭 ("the ceasing of ceasing"). It is a systematic application of the mutual-dependency analysis to all three *saṃskāra-lakṣaṇa* — the three characteristics (三相) of arising, abiding, and ceasing. Notably, this seven-fold scheme is unique to 十二门论; the 中论 does not lay out the seven-fold frame.

The lamp simile and its rejection

The 十二门论 introduces an analogy and immediately dismantles it: "如灯然时能自照亦照彼" — "When a lamp is lit, it can illuminate itself and others." The intuitive hope is that this might resolve the puzzle: a single thing that is simultaneously subject and object, producer and produced. The text rejects the analogy. Why? Because the lamp's supposed "self-illumination" presumes a stable self that can be both seer and seen — exactly the kind of self-subsisting entity (svabhāva, 自性) the analysis is at pains to deny. The lamp simile smuggles in the very assumption the analysis is trying to dismantle. *This* is the kind of argument that gives Nāgārjuna his reputation for turning every offered escape route into another reduction.

The ultimate point of the apparatus

The whole 本生/生生 apparatus is not an idle exercise. It sits inside Nāgārjuna's larger program of demonstrating that arising has no self-nature (生灭无自性), and that all phenomena are dependently originated (缘起) and thus empty of self-nature (性空). It belongs to the same family of analyses as the famous opening verse of 中论 (观因缘品, the first chapter):

「诸法不自生,亦不从他生,不共不无因,是故知无生。」 — *Things do not arise from themselves, nor from others, nor from both, nor from no cause; thus we know there is no [self-natured] arising.*

The 本生/生生 analysis is one specific, sharp way of executing that program: by tracking the supposedly most fundamental event — the moment of "first arising" — and showing that it cannot be pinned down as an independent producer with self-nature. It is a focused application of the broader Nāgārjunian move, not a separate doctrine.


Walking through this in contemporary life

Let me pick a scene most people recognize: a flash of anger at work.

You've just read an email from a colleague. Something in it grates. Heat rises; your jaw tightens. Now your mind does what minds always do: it looks for the cause. *"Where did this come from?"*

Step 1: Hunting for the "original arising" (本生) — and finding nothing stable

You scan for the "first moment." Was it the email? That particular phrase in the email? The memory the phrase triggered — perhaps a similar tone from a parent, a former boss? Was it the work pressure that made you sensitive today? The sleepless night? An old wound from years ago?

Each candidate you propose for "the original arising" turns out, on inspection, to itself have arisen from something. The email was a response to your earlier email. The phrasing was drawn from a corporate template. The memory the phrase triggered was stored via earlier associations. The work pressure built up over weeks. The sleepless night was caused by worry, which was caused by the project, which was caused by...

The chase goes back and back. Each "original arising" you propose is supported by a chain of "continued arisings" — 生生 upon 生生. This is the first classical move mapped onto the scene: 本生 is always found already entangled with 生生. You cannot get 本生 to stand alone as the absolute producer.

*Common mapping error to flag here:* the mind typically stops at the first plausible "root cause" and treats it as *the* origin. The Madhyamaka analysis says that very move is the assumption under examination, not the conclusion.

Step 2: Trying the other direction — fixing 生生 as the producer

You try the opposite tack. Perhaps the "continued arising" is the real story — the way the anger keeps replaying in your body, the way it gets re-triggered by each new email, the way it spreads to your tone of voice, your evening mood, your sleep.

But this "continued arising" — the rumination, the bodily holding, the contagion across the day — only has a starting point because something is identified as its origin. Each moment of "continued arising" presupposes the very "original arising" you couldn't locate in Step 1. This is the second classical move: 本生 and 生生 are mutually dependent; flipping which one is "the producer" doesn't help.

*Another common mapping error:* the mind then says, "Fine, then the *pattern* (生生) is the real thing; the original doesn't matter." The analysis is not making that swap. It is showing that *both* roles — original and continuing — are unstable.

Step 3: At the moment of arising, the arriser isn't there yet (生时尚未有)

Now try to grab the anger in the *instant* it arises. You go back to that fraction of a second when "you first felt the heat."

But here's the odd thing: in the instant you try to identify, the anger is not yet fully there. Before you can name it, it's already shifted — into irritation, into justification, into silence, into a story about why you are right. The "moment of arising" is not a stable thing you can point to and say, "This — *this* is the producer." Trying to fix it as the producer collapses: 生生尚未有, 本生尚未有. At the supposed moment of producing, the supposed producer has not yet arrived.

*Mapping error to flag:* in everyday life, we often *retrospectively* construct a "moment of arising" and then treat the construction as the real origin. "I lost my temper when she said X." The analysis is examining the construction itself, not the event.

What the walk-through actually reveals

The classical analysis is not making a claim that "anger is unreal" or "you shouldn't feel it." It is showing that the entire *hunt* for "where anger really came from" — the hunt your mind is conducting automatically — is built on a metaphysics that won't hold up under inspection. There is no self-natured "first arising" you can locate; there is no self-natured "producing mechanism" you can blame.

This doesn't mean causation is fake. It means causation is *not what we imagine it to be* — namely, a chain of self-subsisting events each with its own independent "first moment."

Three more scenes, briefly

Falling in love. Try to identify "the moment." Was it the first time you saw her? The first conversation? The first laugh together? Each candidate "first moment" was conditioned by everything that came before; and the way the love has continued (生生 — the way you still choose this person each morning, the way the relationship re-arises in small daily acts) is not separate from that first moment, nor does it reduce to it. The pair holds each other up; neither survives as the "real" origin.

A creative breakthrough. You had a great insight in the shower. You trace it back: the shower was preceded by a walk, preceded by a meeting, preceded by the project, preceded by your whole career. The "first arising" of the insight dissolves into conditions; the "continued arising" of working it out in the days after dissolves equally.

The "origin" of a habit or anxiety. A therapist asks, "When did this start?" You search for the first time. The first memory you find was already conditioned by family dynamics, by temperament, by earlier experiences. The "first arising" can't be pinned down; the "continued arising" can't be separated from it.

In all four scenes the same structure appears: the hunt for a foundational moment presupposes a metaphysics (an originating self-natured event) that the analysis shows to be untenable. This isn't a counsel of despair. It is a *release from the hunt itself* — the very hunt that says "if only I could find the true root, I could finally understand and fix this."


Why do contemporary people need this?

The default metaphysics of "firsts"

Modern life is saturated with origin stories. We are constantly constructing, and being offered, "where it all began" narratives:

- The startup pitch that locates "the moment we realized this was needed." - The trauma narrative that fixes on "the first time this happened to me." - The memoir arc that names "the year everything changed." - The relationship story that identifies "the night we fell in love." - The political narrative that names "the original sin" of a nation, a family, a self.

Underneath all of these is a working metaphysics: there *is* a foundational moment that explains the rest. If we could just find it, name it, hold it accountable or thank it, the picture would be complete.

This metaphysics is psychologically powerful and culturally reinforced. But it is also the source of considerable suffering — the endless re-litigation of "who started it," "when did this really begin," "what is the root cause." The 本生/生生 analysis says: the structure of that hunt is itself mistaken. The "first" you are looking for is not a self-subsisting thing; it was always conditioned, and so was the conditioning of it.

Implications for therapy and self-narration

Many therapeutic models operate on the principle "find the root cause and resolve it." This can be useful. But the Madhyamaka analysis adds a layer: even when you do identify an "original" trauma, that trauma itself was conditioned by a web of conditions; and the way the trauma has continued (生生 — the way it re-arises in each new situation) is not reducible to that original moment.

This is not a counsel of despair. It is a deeper reading of causation: causation is real, but it is not the simple one-to-one, once-and-for-all producer-to-produced picture we imagine. When you stop hunting for the absolute root, you may actually become freer to work with the conditions as they are arising, here and now — which is closer to what many contemplative and somatic therapies are actually trying to do.

Implications for ethics and responsibility

The "who started it" question in ethics often presupposes that there is a free, originating agent at the bottom of the chain — someone whose "original arising" of the choice was uncaused, or at least self-caused. The 本生/生生 analysis, by dissolving the very idea of a self-subsisting first arising, gently unsettles this presupposition. This does not deny responsibility. It *reframes* responsibility: actions arise from conditions, and those conditions themselves arose from prior conditions. This is the same structure 中论 invokes with 「不共不无因」 — not denying causation, but refusing to grant any moment the status of an unconditioned, self-natured source.

A note on parallels with contemporary science — kept carefully bounded

Some readers will notice that certain strands of contemporary thought — in neuroscience, complex systems theory, evolutionary biology — also find it hard to locate a clean "first cause" for phenomena. Experiments going back to Benjamin Libet, and extended by Chun Siong Soon and others, have suggested that measurable brain activity can precede a conscious decision by hundreds of milliseconds, which complicates any clean "moment of choosing." Complex systems show emergent properties with no single originating point. Evolutionary lineages show no clean "first" of a species.

These parallels are suggestive but not identities. Neuroscience is describing measured time courses in brains under specific experimental conditions; Madhyamaka is interrogating the metaphysical assumption of self-natured arising at a foundational level. The two are doing different kinds of work. The same caution applies to algorithmic analogies: an AI model's "decision" emerges from weighted connections that were themselves set up by training data that emerged from human activity — a kind of mutual conditioning all the way down. But this is a *structural analogy*, not a proof. The Buddhist analysis is not making a scientific claim; it is offering a different way of looking at how arising functions in our experience.

What can fairly be said is this: the contemporary situation makes it easier to *hear* Nāgārjuna. We no longer live in a culture where "first causes" feel metaphysically secure. The Madhyamaka analysis lands differently when you have already learned, in other domains, to distrust the hunt for foundational moments.

The most direct benefit

Perhaps the most direct benefit is this: the analysis gently loosens the grip of the storyline "I became who I am because of that first moment." The story may have some truth; it may also have considerable narrative shaping. Releasing the story's compulsive hold does not require denying the events themselves. It requires seeing that the events do not possess the metaphysical status of self-natured origins.

This loosening has practical consequences: less rumination, less blame, less self-justification, less nostalgia for a supposed golden origin. There is more space to meet what is actually arising now — in this breath, in this conversation, in this very moment of reading.


Common misreadings and clarifications

Misreading 1: Confusing with Jātaka tales (本生经)

The most common confusion. 本生 in 中观 texts is *not* the same as 本生经 (Jātaka) that narrate the Buddha's past lives. Same two characters, different referent. In the Madhyamaka context, 本生 is an abstract analytical term paired with 生生. In the Jātaka context, 本生 is a genre of narrative literature. They have no technical relation to each other.

If you encounter 本生 in 中论, 十二门论, or related Madhyamaka texts, assume "original arising." If you encounter it in collections of stories about the Buddha's past lives, assume the narrative genre.

Misreading 2: Treating it as mere logical hair-splitting

A common dismissal: this kind of analysis is "just playing with words." This misses the practical target. The analysis is not a logic exercise for its own sake. It is targeting a specific assumption — that arising is something that has self-nature, that the world is made of self-subsisting events each with its own clean first moment. Every time we blame, credit, nostalgize, or justify on the basis of "where it really started," we are operating on that assumption. The analysis is meant to *loosen that grip*, not to win a debate.

The fact that the analysis uses unusual terms like 生生 and 生时 does not make it arcane. It is using a precise vocabulary to describe a precise problem. Many readers who dismiss such analyses as "just logic" have not actually tried, rigorously, to locate the "first arising" of their own anger, anxiety, or habit.

Misreading 3: Reading it as a denial of causation

A frequent misreading: "Nāgārjuna is saying nothing arises at all." This is wrong on two counts. First, the famous opening verse of 中论 explicitly does *not* deny causation: 「不共不无因」 — "not from no cause." Second, the 本生/生生 analysis is not denying that things arise; it is showing that arising cannot be pinned down as a self-subsisting event with a clean producer-to-produced structure. The point is not "no causation" but causation without metaphysical foundation.

Misreading 4: Reading it as nihilism

Related: some readers conclude that the analysis leads to "nothing exists" or "everything is unreal." Also a misreading. Dependent origination (缘起) is being *affirmed*, not denied. What is being denied is that any phenomenon has *self-nature* (svabhāva, 自性) — that is, exists as a self-subsisting, independent, intrinsically-defined thing. Affirming causation while denying self-nature is the distinctive Madhyamaka move, and the 本生/生生 analysis is one specific execution of it. The two errors to avoid: eternalism (things have self-nature and exist intrinsically) and nihilism (nothing exists or nothing happens at all). The analysis walks between them.

Misreading 5: Confusing it with "no first cause" arguments in Western philosophy

The analysis has a structural resemblance to certain Western arguments — infinite regress arguments, the impossibility of a "first cause" in cosmological proofs — but it is doing different work. Western arguments often aim to establish or rule out the *existence* of a first cause as part of a larger metaphysical proof. Madhyamaka is not arguing for or against a first cause in that sense. It is examining the *structure of the concept "arising" itself* and finding that the concept is internally unstable when assumed to have self-nature. The aim is not a conclusion about cosmological origins but a release from the metaphysical assumption that underlies our grasping at "firsts."

Misreading 6: Treating 本生 and 生生 as two real kinds of arising

A subtle but important one. 本生 and 生生 are not two ontological kinds of arising — two boxes in the universe, each containing real things. They are *analytical tools*, ways of picking apart the moment-to-moment process of arising to expose its lack of self-nature. To reify them — to treat them as two actually existing types of arising — would itself be a fresh form of *svabhāva*-attachment. The analysis uses these terms as wedges; they are not the final destination.

Misreading 7: Hearing "本生尚未有" as a claim that nothing has ever arisen

This is the trap of the 生时 analysis. The text says 生生尚未有, 本生尚未有 — but this is a statement about the *moment* of arising, not a global claim that arising never happens. The point is that at the precise instant you try to pin down as "when it arose," the thing is not yet fully established as a producer. This is a feature of how arising functions in experience, not a denial of arising altogether.


Closing

The Madhyamaka 本生/生生 analysis is one of the more technically demanding moves in Nāgārjuna's repertoire. But its core intuition is portable: every "first moment" you try to locate was already conditioned; every "continued arising" depends on a "first moment" you cannot pin down; and at the very moment you try to grab the arriser, the arriser has not yet arrived.

The practical upshot is not nihilism and not quietism. It is a softening of the compulsion to find the absolute origin — and, with that softening, a greater ease in meeting the conditions that are actually arising now, here, in this breath, in this conversation, in this very moment of reading.

Canonical EntryAI-generated

定义与核心要义

本生于《中论》《十二门论》中观论书中,并非通常所谓叙述佛陀过去世修行事迹之"本生经"义,而是与"生生"相对举之分析性术语,指原始之生、根本之生,用以破析诸法生灭之自性执,彰显缘起性空之理。

主要阐述

两经皆以"本生"与"生生"构成一对相待之范畴,论其互依关系而层层遮破。

核心命题见偈颂(《中论》、《十二门论》):「生生之所生,生於彼本生;本生之所生,還生於生生。」即生生所生之法依本生而有,本生所生之法还依生生而有,两者互为所依、互相牵连,不可单方面定其能生所生之位次。

遮破分两路:

其一,遮"生生能生本生"之见。若谓生生能生本生,然生生自身乃从本生而生(《中论》),既是所生之法,云何反为能生之本生。又从自性空立难:「生生法应生本生,而今生生不能生本生,生生未有自体,何能生本生」。《十二门论》亦同此破。

其二,遮"本生能生生生"之见。若谓本生能生生生,然本生自身乃从生生而生(《中论》),既是所生之法,云何反为能生之生生。《十二门论》明判此见为不然,理由:「生生法應生本生,是故名生生;而本生實自未生,云何能生生生」;又破"生生生时或能生本生"之设,因"生生自體未生,不能生本生"。

复从"生时"着眼作另一层遮难。若生生正在生起之时能生本生,而此时生生尚未实有(「生生尚未有」),则何能生本生(《中论》);若本生正在生起之时能生生生,而此时本生尚未实有(「本生尚未有」),则何能生生生。

不同部类与译本的表述差异

两经同属中观部,皆龙树菩萨所造、姚秦鸠摩罗什所译,"本生"与"生生"对举之核心用词基本一致。差异之处如下:

- 《十二门论》于两两相待之分析外,进一步提出"法生时"通自体七法之说:「一法,二生,三住,四灭,五生生,六住住,七灭灭」;于七法之中,本生除自体外,能生其余六法;住、灭二相亦准此例推演而有"住住""灭灭",《中论》中未见此七法之分法。 - 《十二门论》另设灯喻(「如灯然时能自照亦照彼」)以喻本生能生生生、生生能生本生,而判此喻为不然,《中论》中未引此喻。 - 《中论》则更明确从"生时"之当下着眼,分生生、本生两路各作析难,此层遮破于《十二门论》中未见对应独立段落。 - 两经皆未以"本生"指佛陀往昔因缘故事,与通常所谓本生经(jātaka)之叙事用法不同,特此标明。

与相关概念的关系

- 与"生生":互为相待、互为能所,揭出缘起法中能所不二之理。 - 与"生":本生与生生皆"生"之细分,前者偏重原始之生,后者偏重相续之生。 - 与缘起性空、自性空:本生、生生之分析目的在破生灭实有之执,显缘起性空。 - 与"住住""灭灭":依本生/生生之同例推演,破析住、灭之自性。 - 与三相(生住灭):本生、生生为生相之细分,住住、灭灭为住、灭相之细分,皆属有为而非无穷。 - 与本生经(jātaka):同名异义,此处非叙述佛陀前世修行事迹之叙事性经典,而是中观破析生灭自性之技术性术语。

代表性原文引用

- 《中论》:「生生之所生,生於彼本生;本生之所生,還生於生生。」 - 《中论》:「是生生则不名从本生生……云何能生本生」 - 《中论》:「生生法应生本生,而今生生不能生本生,生生未有自体,何能生本生」 - 《中论》:「生生尚未有」 - 《中论》:「本生尚未有」 - 《十二门论》:「生生之所生,生於彼本生;本生之所生,還生於生生。」 - 《十二门论》:「一法,二生,三住,四灭,五生生,六住住,七灭灭」 - 《十二门论》:「生生法應生本生,是故名生生;而本生實自未生,云何能生生生」 - 《十二门论》:「如灯然时能自照亦照彼」

By SutraAI-generated

中論T1564 · 中觀部

《中論》(龍樹菩薩造、青目釋、鳩摩羅什譯)於觀因緣品中以「生生」與「本生」一對術語,考察因果相生之邏輯自洽性。此處「本生」非指佛陀過去世故事之本生談,而是論辯中設定之「根本之生」,與「生生」(生之生,即派生之生)構成互相依待之一對概念。

論中先立敵宗之說:「生生之所生,生於彼本生,本生之所生,還生於生生。」 即謂生生所生者為本生,本生所生者還為生生,二者展轉互生。龍樹隨即從兩方向破之。

其一,破生生能生本生:「若謂是生生,能生於本生;生生從本生,何能生本生?」 長行釋云:若生生能生本生,則生生不應名為從本生生;既從本生生,云何反能生本生? 復以「生生尚未有」難之:生生生時,其體未有,未有自體之法何能生他?

其二,破本生能生生生:「若謂是本生,能生於生生;本生從彼生,何能生生生?」 長行廣釋:本生若從生生生,即不名能生生生者;且「生生未有自體,何能生本生?是故本生不能生生生。」 復以偈難:「若本生生時,能生於生生;本生尚未有,何能生生生?」 長行結云:本生生時實未有,故不能生生生。

敵者又救以「非先非後,生時能生」,論主以「尚未有」總破:凡言「生時能生」者,其法於生時猶未成立,未成立之法無能生之用。

全段論證之結構為:先設互生之局,再以「依待則無自體、無自體則無能生」之理,於生生、本生兩方各施同一難式,令互生之說自相矛盾而不得成立。術語上,《中論》此品以「本生」與「生生」對舉,為純粹因緣論辯之施設名目,與經藏中記述菩薩過去世行之「本生」(Jātaka)義別,讀者不宜混淆。

十二門論T1568 · 中觀部

《十二門論》中「本生」一詞並非指佛陀過去世之故事(即一般所謂本生譚),而是作為有為法「生」相分析中的專門術語,與「生生」對舉使用。此乃該論獨特之用詞語境,須與他經以「本生」記 past-life 敘事者嚴格區分。

論中先引敵宗(說一切有部毗曇)之立量:「法生時,通自體七法共生:一、法,二、生,三、住,四、滅,五、生生,六、住住,七、滅滅。」於此七法架構中,「本生」即七法中之「生」相本身,而「生生」則為能生起此本生之次級生相。敵宗主張「本生除自體,能生六法;生生能生本生,本生還生生生」,意謂本生與生生展轉互生,故三相雖屬有為而不墮無窮過。

龍樹菩薩隨即以歸謬法層層破斥此互生說。第一層:若生生能生本生,而本生不生生生,則生生何以能生本生? 第二層:若謂本生能生彼生生,則本生自身既從彼生生而生,何以反能生生生? 第三層:若謂本生能生生生、生生生已還生本生,論主破云「生生法應生本生,是故名生生;而本生實自未生,云何能生生生?」——生生之所以名為生生,正以其職能在生起本生;今本生尚未自生,何來能力生起生生? 第四層:若謂生生正生起之時能生本生,論主再破:「是生生生時,或能生本生,而是生生自體未生,不能生本生。」生生自身之體性尚未成立,即無從行使生他之用。

敵宗又引燈喻自救:「如燈然時,能自照亦照彼」,謂生生生時能自生亦生本生。論主判為「是事不然」,將另文破之。

開篇偈頌「生生之所生,生於彼本生;本生之所生,還生於生生」則以韻文總括敵宗所立之循環結構,為後文逐句破斥之標的。

綜上,《十二門論》之「本生」純為有為生相分析之技術術語,指七法共生中居主位之「生」相;全論以因明歸謬揭示其與「生生」互生說之內在矛盾,不涉任何佛傳敘事。此用詞形式為中觀破有部毗曇之特有語境,歸一時當與敘事義之「本生」分列。

瑜伽師地論T1579 · 瑜伽部

《瑜伽師地論》對「本生」一詞的論述,散見於不同主題脈絡中,主要使用「本生」與「本生事」兩個語詞形式,未見其他異稱。

一、作為宿住智所攝威力的一部分 《瑜伽師地論》將「隨念宿住智」列為諸佛菩薩所具威力之一。此智有有量有數、無量無數之別,能隨念種種宿住差別。論中明言:「由此智憶念本生,為諸有情開示先世種種品類第一希有菩薩所行難行苦行」,目的在令眾生對佛所生起淨信與恭敬,並對生死起深厭離。

二、作為俱生威力的一項特質 在「諸佛菩薩俱生威力」的論述中,《瑜伽師地論》以「性能憶念諸本生事」作為佛陀本然具足的德能之一。此處強調此憶念不待思擇、自然而有,且與菩薩「於極長時種種猛利無間大苦悉能堪忍」、「欣樂領受能辦有情利益事苦」等難行苦行並列,凸顯本生憶念乃菩薩本願力所感之俱生功德。

三、作為毘奈耶中譬喻事的一種分類 《瑜伽師地論》在論述毘奈耶時,提出五種「能顯法義諸譬喻事」,分別為本生事、本事事、影像事、假合事、譬喻事。其中「本生事者,謂說前生菩薩行事」,明確界定本生即敘說菩薩前生所行之事,與「本事事」(謂說前世諸相應事)相區別。

由上述三處可知,《瑜伽師地論》雖未專章集中闡述「本生」概念,但已從三個面向加以界定與運用:其一,從智慧力用角度,將本生與宿住智相連結,視其為教化眾生之方便;其二,從功德本然具足角度,將本生憶念列入佛菩薩之俱生威力;其三,從經典體裁與教化方法角度,將本生事列為毘奈耶中五種譬喻事之一,並與本事事區隔。論中所用術語一致使用「本生」、「本生事」,未見以其他異名替代。

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