*Also rendered as 等無間緣 (the "equal-and-non-interval condition") in Xuanzang's translation tradition. Both names point to one and the same technical category in the Abhidharma analysis of conditions.*
一、What This Concept Is Saying
Buddhist analyses of causality distinguish four kinds of conditions (四緣, *catuṣpratyaya*) under which any dharma comes into being. The classical formula is unambiguous: 「四緣生諸法，更無第五緣」 — "The four conditions bring forth all dharmas; there is no fifth." Among them, 次第緣 occupies a peculiar and often-overlooked position: it does not ask *what kind of substance* produces the next dharma, but *how* one moment of mind hands itself over to the next.
The canonical definition, supplied by the 《十二門論》 (T1568, Nāgārjuna, trans. Kumārajīva), is a single line: 「前法已滅次第生，是名次第緣」 — "When a preceding dharma has *already* ceased, the next arises in sequence; this is called the sequential condition."
Two clauses, and each is doing precise philosophical work:
1. 前法已滅 — the preceding dharma has *already* ceased. Not "is ceasing," not "is about to cease," not "still subsists in some form." The classical definition requires completed cessation. This rules out any model in which the previous moment persists in some substrate to "push out" the next. 2. 次第生 — the next arises in sequence. No gap, no overlap, no intervening dharma. The "sequence" (次第) implies ordered continuity, with each moment following the previous without remainder.
The 《十二門論》 frames this definition broadly. Its 「前法」 is not yet narrowed — it could refer to any preceding dharma. This is because 《十二門論》 does not intend a positive doctrinal exposition of the sequential condition; it lays the definition out only as a target for refutation.
The 《中論》 (T1564, Nāgārjuna, trans. Kumārajīva) tightens the scope considerably. It restricts 次第緣 to 心心數法 (*citta-caitta*, mind together with its associated mental factors) — past and present — while explicitly excluding the *final* mind-moment of an arhat (whether in the past or the present). The technical compound 心心數法 is the text's standard term for the entire mental stream, and it must be preserved: this is not "mind" as a single thing, but "mind-and-its-factors" as a class of conditioned events that arise in succession.
Why is the arhat's final mind-moment excluded? Because the very definition requires that the preceding dharma cease *and the next arise in sequence*. For the arhat at parinirvāṇa, the previous moment ceases — but no next moment arises in that stream. There is no 「次第」 without continuation. The exclusion is therefore not an arbitrary technicality but a feature of the definition itself: 次第緣 is, structurally, the condition that *connects* a continuing stream.
Where 次第緣 Sits in the Four-Condition Framework
To grip 次第緣 properly, you have to see what its three siblings are doing:
- 因緣 (hetu-pratyaya) — the *causal condition*, the seed-like condition. In a plant, the seed. In consciousness, the deep latent tendencies (bija, 種子) that condition what kind of mind-moment can arise. - 緣緣 (ālambana-pratyaya) — the *object condition*, also called 所緣緣 in Xuanzang's translation. What the mind is *directed toward*. A perception must have an object. - 增上緣 (adhipati-pratyaya) — the *dominant condition*, the preeminent supporting factor without which the dharma could not arise in the form it does. - 次第緣 (samanantara-pratyaya) — the *sequential condition*. The *immediately preceding moment* of mind that has just ceased, opening the space for the next moment to arise.
The four are not redundant. 因緣 asks about the kind of cause; 緣緣 asks about the object; 增上緣 asks about the dominant supporting factor; 次第緣 asks about the *temporal handoff* — what makes it possible for *this* moment to follow *that* moment in unbroken sequence.
It is this last sense that gives 次第緣 its distinctive flavor. It is, in modern parlance, the most *micro-temporal* of the four conditions — operating at the finest grain of mental continuity, where one citta-caitta moment gives way to the next.
How the Two Texts Use the Same Term
A terminological note before we go further. Both 《中論》 and 《十二門論》 are Kumārajīva (鳩摩羅什) translations, so both use 「次第緣」 and not 「等無間緣」. The two Chinese terms are the same concept rendered differently:
- 次第緣 (Kumārajīva) — literally "sequential condition." The emphasis is on the *order* (次第) of arising. - 等無間緣 (Xuanzang, 玄奘) — literally "equal-and-non-interval condition." The emphasis shifts: 「等」 means that *any* moment of a given class (e.g., any visual consciousness) can serve as condition for the next moment of the same class; 「無間」 means there is no gap between the ceasing of one moment and the arising of the next.
When a contemporary reader sees references to 「等無間緣」 in Yogācāra or Abhidharma literature translated from Xuanzang's lineage, this is the same category, just framed with two additional conceptual features explicit in the name.
The Conventional Function
Conventional Abhidharma exposition describes 次第緣 as follows, in the 《中論》's own framing: 「諸心心數法於三世中次第生」 — "Mind and mental factors arise in sequence across the three times" — and more specifically, 「現在的心心數法滅，給未來心作次第緣」 — "Present mind-and-factors, having ceased, give the future mind the sequential condition."
This is the worldly-language (世俗) picture: a stream of moments, each handing off to the next, with the present moment playing the role of sequential condition for the imminent next moment.
The Mādhyamaka Critique
But here the 《中論》 does something characteristic. It does not accept the conventional picture as itself ultimately real. Its overall stance is 「諸緣無決定」 — "Conditions have no fixed nature." The reasoning is subtle: the word 「緣」 (condition) is established *retroactively*. We see a fruit arise, and only then do we look back and label certain of its antecedents as its conditions. Before the fruit exists, we cannot pin the label "condition" onto anything in a fixed way. So 緣 is a name dependent on 果 (fruit), not an intrinsic property of the antecedents.
Applied specifically to 次第緣, the 《中論》's core verse reads: 「果若未生時，則不應有滅，滅法何能緣？故無次第緣」 — "When the fruit has not yet arisen, there should be no [relevant] ceasing; how can what has ceased function as condition? Therefore there is no sequential condition."
The argument unfolds as a tightening set of difficulties:
1. *The future-fruit difficulty.* If the next mind-moment (the "fruit") has not yet arisen, then there is nothing for the preceding moment to be a condition *of*. You cannot condition what does not yet exist. If you insist the next moment already exists in some sense, then it has already arisen, and you do not need anything to bring it forth. Either way, the relation fails.
2. *The dwelling/ceasing difficulty.* The present mind-moment must in some way be "there" to function as the sequential condition. But: if it has no dwelling (no 住), it cannot function as condition at all. If it does dwell, this contradicts the basic tenet that all conditioned dharmas are characterized by cessation — 「一切有為法念念滅，無一念時住」 — "All conditioned dharmas cease moment-by-moment; not for one instant do they abide."
3. *The "after ceasing" trap.* If the preceding moment conditions *after* it has ceased, then what has ceased still exists in some mode — a slide into eternalism (常).
4. *The "while ceasing" trap.* If it conditions *while* ceasing, then there is a "half-ceased, half-not-yet-ceased" third state. The 《中論》 denies that such a third state can be coherently established.
5. *The Abhidharma classification problem.* The opponent (presumably a Sarvāstivāda or similar Abhidharma theorist) divides moments into 滅法/不滅法 (ceased-dharmas / unceased-dharmas) and 欲滅法/不欲滅法 (about-to-cease / not-about-to-cease). The 《中論》 argues that such classifications presuppose a stable abiding ground that does not exist.
The conclusion is 「故無次第緣」 — therefore there is no sequential condition. But this conclusion is not a denial of mental continuity. The 《中論》 itself uses the phrase 「次第相續」 (sequential continuity) elsewhere to describe the continuity of phenomena: 「從五陰復生五陰，是五陰次第相續」 — "From the five aggregates, again the five aggregates are born; this is the sequential continuity of the five aggregates." Note the lexical detail: in this verse the text uses 「五陰」 (a Kumārajīva-rendering) rather than 「五蘊」, but the referent is the same five aggregates.
So the Mādhyamaka move is not 「there is no continuity」 but 「continuity, examined in ultimate terms, has no self-nature (無自性); as conventional worldly description it functions; as ultimate reality it is empty (空).」 This is the 中道 (middle way) the texts are famous for: do not deny the sequence; do not reify it.
二、Walk-Through in Contemporary Life
The 次第緣 category is technical, but the dynamic it names is something every attentive person has encountered. Let us walk through several ordinary scenes, mapping each onto the classical definition carefully, and flagging where contemporary intuition is most likely to mis-map.
Scene 1: Reading a paragraph while your mind wanders
You sit down to read. The first sentence: full attention. The second: a sentence about someone you know triggers a memory, and suddenly you are composing a reply in your head. A minute later, you realize you have read three more sentences without any of them landing. You scroll back.
What is happening at the level of 次第緣?
Each of those three unread sentences is a *next* mind-moment (a 緣所生法), and each should have arisen conditioned by the *previous* moment having ceased. But what actually happened: the moment that drifted off into the memory did not cleanly cease. It passed into another drifting moment, then another, then another. The chain of 次第緣 was functioning — each moment handing off to the next — but the *content* of the chain had drifted out of the book and into the side-topic. There was no break in the stream; there was a break in *alignment with the object* (which is a 緣緣 / 所緣緣 problem, not exactly a 次第緣 problem — a distinction the four-condition framework lets us make cleanly).
The walk-through note: when your mind wanders, the sequential condition is *not broken*. The stream is continuous. What is broken is the *direction* of the stream. This is an important conceptual fix: many contemporary readers, hearing 「sequential condition」, imagine it is somehow violated when attention wanders. It is not. Wandering is itself a continuous sequence of moments. 次第緣 is fulfilled by wandering just as much as by focused reading.
Scene 2: Trying to suppress an anxious thought
You are about to walk into a meeting. The thought 「I'm going to embarrass myself」 keeps arising. You tell yourself: stop thinking that. The thought comes back. You tell yourself more firmly. It comes back harder.
The classical analysis via 次第緣: the anxious thought is a mind-moment (a 心心數法). For the *next* mind-moment to be a non-anxious one, the *previous* (the anxious one) must 「已滅」 — must have *already ceased*. You cannot simultaneously *have* the anxious thought *and not have* it. There is no moment where you both think 「I'm going to embarrass myself」 and also do not think it.
The walk-through note: when you 「try to stop」 the anxious thought, you are not, strictly speaking, working on 次第緣. You are adding a *new* thought (「I should stop thinking this」) to the sequence. That new thought becomes the next moment — so the sequential condition is in fact being perfectly fulfilled. The chain is: anxious thought → thought-about-stopping-the-anxious-thought → anxious thought again → thought-about-stopping → …. A perfectly functioning 次第緣; a perfectly functioning trap.
The classical move (and what meditation traditions are pointing at when they speak of 「allowing」) is not to *insert* a new controlling thought, but to *let the original thought's moment complete and cease* — without adding anything. The 「前法已滅」 happens anyway, by nature (一切有為法念念滅). What is being relinquished is the *grasping* that would add a 「next」 to what is already gone. This is, in classical language, working at the level of *letting be* rather than at the level of *adding more to the sequence*.
A common mis-mapping to flag here: people often hear 「前法已滅」 (the preceding has already ceased) and imagine that the previous thought must *still exist somewhere* in order to condition the next one. The classical definition says the opposite: precisely because it has ceased, the next can arise. The 「已」 in 「已滅」 is doing real work — the previous is *gone*, not lingering.
Scene 3: Conversation turn-taking
You are in a meeting. Person A finishes a sentence. Person B begins. There is a clean handoff — no overlap, no awkward gap. This is the gross external version of 次第緣: A's utterance has ceased (A's words are complete), and B's utterance arises in sequence (B begins immediately).
But inside each speaker's mind, the same dynamic is happening at finer grain: the thought that triggers the word, the word's sounding, the next thought. Each moment hands off to the next without remainder.
When someone *interrupts* — speaks before the previous has ceased — they are, in a sense, disrupting 次第緣 socially. They are trying to make a new moment arise while the previous one has not yet ceased. The four-condition framework does not say this is metaphysically impossible (you can speak over someone), but it does diagnose the social friction that often results: the previous speaker feels their 「moment」 was not allowed to complete.
The walk-through note: the clarity of this dynamic in conversation is sometimes the easiest entry point to feel what 次第緣 is. The next time you are in a meeting, notice how natural turn-taking depends on the *prior* speaker's utterance having already completed. Then notice: the same dynamic is happening in your own mind, just much faster and without the social cue.
Scene 4: The moment of falling asleep
You are drifting off. There is the last waking thought — perhaps about tomorrow's schedule — and then … nothing conscious. Then the first dream image, or the alarm.
The classical picture: a sequence of 次第緣 conditions, each handing off to the next, until the final waking moment ceases, and either no next moment arises (deep sleep) or a different stream of moments arises (dreaming, treated in classical literature as a *different* citta-caitta stream in some sense). The arhat's final moment — which by definition has no next — is the limit case of this dynamic. The stream terminates; 次第緣 has no 「next」 to condition.
The walk-through note: this scene brings home what 次第緣 *is not*. It is not a general 「cause and effect」 between any two events in time. It is the very narrow, very specific relation between one mind-moment and the immediately following mind-moment in the same stream. When the stream breaks (deep sleep, final death), 次第緣 has no further role. This is why 《中論》 excludes the arhat's final moment — it has no work to do, because no 「next」 exists for it to open into.
Scene 5: Meditative instructions to 「let thoughts pass」
A meditator sits. The instruction: 「Let thoughts arise and pass; do not grasp them.」
At the level of 次第緣, this instruction is doing something very precise. It is not asking the meditator to *stop the sequence*. The sequence continues — thoughts will arise as long as the mind-stream continues. What is being relinquished is the *grasping after each arising* that would attempt to hold the moment or insert a reactive next moment.
Classical frame: 「一切有為法念念滅」 — every conditioned moment is already in the process of ceasing, *by nature*. The meditator is not making this happen; they are aligning with what is already happening. The previous moment's ceasing is not something the meditator accomplishes; it is what is already accomplished. The meditator's work is to *not interfere* with the already-accomplished ceasing by trying to insert a clinging moment into the sequence.
The most common mis-mapping to flag: contemporary readers often hear 「let thoughts pass」 and translate it into 「make the previous thought cease faster so I can get to the good next thought.」 This frames the practice as a manipulation of 次第緣 — as though one could speed up or slow down the sequence of moments. The classical picture is the opposite: the sequence is already happening in its own grain; the meditator is *not intervening in the sequence*, but is also *not adding to it*. The instruction is at the level of non-interference, not at the level of control.
三、Why Contemporary People Need This Concept
The technical apparatus of 次第緣 might look like an obscure scholastic category. But it actually addresses several confusions that are particularly acute in the contemporary moment.
1. The mind is not a *thing*, but a *stream*
Contemporary talk about the mind is dominated by two opposite metaphors. One is the mind-as-container (a 「space」 in which thoughts appear), the other is the mind-as-self (a 「person」 who has thoughts). Both metaphors share an assumption: that there is something stable underneath the changing contents.
次第緣 — together with the broader four-condition analysis — gently dismantles both. The mind is, on the classical analysis, a stream of conditioned events, each moment arising in dependence on the immediately previous moment (conventionally), with no underlying substrate persisting through the stream. There is no container; there is no captain of the ship. There is the sequence.
The walking instruction: when someone next says 「my mind is full of thoughts」, the classical picture would gently reframe: there is no 「my mind」 that is full; there is a sequence of moments, each handing off to the next. Some of those moments are noisy; some are quiet. The noise and quiet are not states of a thing; they are features of a stream.
2. The Mādhyamaka critique is *liberating*, not nihilistic
The 《中論》's conclusion 「故無次第緣」 sounds like a denial of mental continuity. It is not. It is a denial of the *reification* of mental continuity — the assumption that there is some mechanism in the mind that mechanically produces each next moment from the previous.
Why does this matter for contemporary practice? Because many people — including many meditators — operate with a tacit model of mental mechanics: 「thought A caused feeling B, which caused behavior C, which causes consequence D.」 This model presupposes a deterministic machinery. 次第緣, as Mādhyamaka analyzes it, exposes this machinery as a conceptual overlay. The sequence occurs; the machinery does not exist as a thing.
This is not a counsel of despair. It is, paradoxically, a relief. If there is no fixed machinery, then there is no fixed mechanism that *forces* the next moment to be like the previous. Each moment arises in dependence, but not in mechanical determination. This is the space in which change, transformation, and (in the classical framing) liberation become intelligible.
3. The concept speaks directly to meditation work
Many meditation instructions, across traditions, are operating at the level of 次第緣 without naming it. Instructions like 「notice the arising and passing of each thought」 or 「do not grasp the previous moment」 are all doing work at the handoff point from one moment to the next.
Understanding 次第緣 lets the practitioner see *what* the instruction is working on. Without this understanding, the instruction often gets heard as a vague exhortation to 「be mindful」, which can drift into either passivity or excessive control. With the understanding, the practitioner can see: the instruction is about the *handoff*, not about the content.
4. The category corrects a common popular conflation
In contemporary discourse, 「cause and effect」 is usually a single undifferentiated concept. Anything that comes before anything else gets called a 「cause.」 The four-condition framework — and 次第緣 within it — refuses this conflation. The previous moment of mind does *something* to the next moment that the previous moment's *content* does not do, and that the *object* of consciousness does not do. These are different conditions with different roles.
The contemporary payoff: when a person says 「this thought caused me to feel anxious,」 the classical framework would ask: which condition are you pointing to? Is it 因緣 (the latent tendency that conditioned *what kind* of thought arose)? 緣緣 (the object toward which the thought was directed)? 增上緣 (the dominant supporting condition)? Or 次第緣 (the previous moment's ceasing that opened the space for this moment to arise)? Often, contemporary language collapses all four into one undifferentiated 「cause」, and the four-condition framework gently pulls them apart.
5. The analogy with contemporary science (and its limits)
The contemporary analogy is suggestive: modern neuroscience describes the brain as a process unfolding at very fine temporal grain — the firing of neural populations, the integration window of perceptual consciousness (on the order of tens to hundreds of milliseconds in some accounts), the moment-by-moment construction of perceptual experience. Some contemporary theorists compare this to a 「frame rate」 of consciousness.
This is a useful analogy for 次第緣, and a contemporary reader will naturally reach for it. But the analogy has hard limits. Buddhism is not making a brain-state claim. It is analyzing *experience from within*, not the neural substrate that correlates with experience. The 「moments」 of 次第緣 are *experiential* moments, defined by the structure of first-person awareness, not by neural firing. Conflating them with neuroscience frames reduces a phenomenological analysis to a third-person-mechanism story.
What the analogy can do: it can make vivid that experience is *granular*, that there is no seamless 「continuous self」 given in experience, that what we call 「my stream of consciousness」 is in fact a sequence of discrete (or near-discrete) packets. What the analogy cannot do: it cannot tell us what those packets *are* in Buddhist terms, nor how their relation to each other (次第緣) differs from neural state transition.
四、Common Misreadings and Clarifications
Misreading 1: 「次第緣 is just general cause-and-effect」
This is the most common collapse. In ordinary speech, 「A is the condition for B」 covers everything. In the Buddhist four-condition framework, it does not. 因緣 names the seed-like causal condition; 增上緣 names the dominant supporting condition; 緣緣 names the object condition; 次第緣 specifically names the immediately-preceding-mind-moment-that-has-just-ceased. To use 「次第緣」 as a synonym for 「cause」 is to lose the entire texture of the category.
Clarification: when you see 「次第緣」, ask first: is the speaker talking about mind-moments in temporal succession? If not, a different 緣 is in play.
Misreading 2: 「次第緣 and 等無間緣 are different concepts」
They are not. 「次第緣」 is Kumārajīva's translation of *samanantara-pratyaya*; 「等無間緣」 is Xuanzang's translation of the same Sanskrit term. They are the same referent under different translations. The texts we are working with here (《中論》 T1564, 《十二門論》 T1568) are Kumārajīva translations, so they consistently use 「次第緣」. Xuanzang's Yogācāra and Abhidharma translations use 「等無間緣」.
The slight conceptual emphasis differs: Xuanzang's 「等」 (equal) foregrounds that *any* moment of the appropriate class can serve as sequential condition for the next (e.g., any visual consciousness for the next visual consciousness), and 「無間」 (non-interval) foregrounds that there is no temporal gap. Kumārajīva's 「次第」 (sequential) emphasizes ordered continuity. Both names are accurate; they highlight different facets of the same category.
Misreading 3: 「前法 still exists somewhere to cause the next」
The classical definition explicitly says the contrary: 「前法已滅」 — the preceding dharma has *already ceased*. The 「已」 (already) is doing real work. The previous moment does not linger in some subtle substrate to push out the next. It is gone. The next arises *because* the previous is gone, not because the previous is still somehow present.
This is precisely the move that 《中論》 is testing with its 「滅法何能緣」 (how can what has ceased function as condition?) question — and precisely the move that makes the category so philosophically interesting. The previous moment's *absence* is what opens the space for the next.
Misreading 4: 「次第緣 is about external sequence of events」
In 《中論》's narrow technical scope, 次第緣 is specifically about 心心數法 — mind and mental factors in temporal succession. It is not about external events happening in sequence (clouds followed by rain followed by sunshine). Those would fall under 因緣 or 增上緣 categories, or under the broader dependent origination framework (緣起), not under 次第緣 specifically.
In 《十二門論》's broader definition, 「前法」 is more generic and could include external dharmas, but this breadth is in service of refutation, not of positive doctrinal exposition. The strictly defined category, as it lives in Yogācāra and Abhidharma analysis, is about the mind-stream.
Clarification: 「mind-moment hands off to mind-moment」 is the canonical scope; external sequential events fall under different 緣.
Misreading 5: 「Mādhyamaka's 『無次第緣』 means there is no mental continuity」
The 《中論》's conclusion 「故無次第緣」 is not 「there is no continuity」 — it is 「there is no *self-natured* sequential condition that *truly produces* the next moment.」
The text itself uses 「次第相續」 elsewhere (e.g., 「從五陰復生五陰，是五陰次第相續」) to describe continuity. It does not deny continuity. It denies the reification of continuity. This is the difference between denying the phenomenon and denying the substance-philosophy layered on top of the phenomenon.
Clarification: the Mādhyamaka conclusion operates at the level of *ultimate analysis* (勝義諦). At the level of *conventional worldly description* (世俗諦), 次第相續 still functions and is still useful. A contemporary reader who hears 「故無次第緣」 and concludes 「so there is no sequence」 has missed the conventional/ultimate distinction that 《中論》 is built on.
Misreading 6: 「緣緣 and 次第緣 are the same because both involve something 『coming before』」
They are not. 緣緣 (所緣緣 in Xuanzang's terms) is the *object condition* — what consciousness is *directed toward* (e.g., the visual object when visual consciousness arises). 次第緣 is the *immediately-preceding mental moment*. A perception needs both — an object (緣緣) and a previous moment that has ceased (次第緣) — but they play different roles in the arising of the moment.
In Kumārajīva's translations (including 《中論》 and 《十二門論》), the term is 「緣緣」 — not 「所緣緣」. The two are translation variants of the same ālambana-pratyaya. 「緣緣」 is Kumārajīva; 「所緣緣」 is Xuanzang. Both names appear in the same canonical tradition, just in different translation lineages.
Misreading 7: 「次第緣 means a continuous self is passing the baton from moment to moment」
This is the most subtle and most important misreading. The very framing of 「a baton being passed」 smuggles in a persisting entity that does the passing. There is no baton-passer. There is only the sequence itself — the previous moment ceasing, the next arising, with no third thing doing the connecting.
This is what 《中論》's 「諸緣無決定」 analysis is finally pointing at: not only is there no fixed nature to conditions; there is no fixed nature to the *relation of conditioning itself*. The hand-off is not done *by* something; the hand-off *just is* what the stream is. Trying to find a hand-off-er is the reification that 《中論》 is dismantling.
Clarification: 次第緣 is a name for the structural relation between consecutive moments, not for a thing that produces the relation. This is part of why Mādhyamaka concludes 「故無次第緣」 — not because the relation does not occur, but because it is not done *by* anything.
Misreading 8: 「The arhat's exclusion is a weird technicality」
The exclusion of the arhat's final mind-moment (in the past and present) from 次第緣 is not a footnote — it is structural. The whole definition of 次第緣 requires a *next* moment to arise after the previous one has ceased. The arhat's final moment, by definition, has no next moment in that citta-caitta stream. Therefore, structurally, it cannot be functioning as a 次第緣 for anything. The exclusion clarifies that 次第緣 is fundamentally about *continuity*, not just about precedence. A dharma can precede without conditioning; for 次第緣, the continuation is essential.
Coda
次第緣 is, in the end, a name for a very particular feature of experience: that each moment of mind arises in sequence, conditioned by the moment that has just ceased, with no gap and no persistence of the previous. It is the four-condition framework's way of marking that experience is *granular* — a stream of conditioned events, not a continuous substance. And it is the Mādhyamaka analysis's way of marking that this granularity, examined in ultimate terms, has no underlying producer and no fixed mechanism — it just *occurs*, moment by moment, without a hand-off-er handing off.
For a contemporary reader, the value of holding this concept is not historical. It is the gentle dismantling of two deeply contemporary illusions: that the mind is a *thing*, and that the stream of moments is *produced by* some inner mechanism. Both illusions are natural; both are also what the four-condition framework — and the Mādhyamaka critique within it — is patiently pointing past.