Consciousness, and the Proof of the Ālayavijñāna
The final aggregate — consciousness — is defined through a three-way distinction the treatise draws between mind, manas, and consciousness proper. The root text's own definition of mind is a single dense line naming the ālayavijñāna outright; T1606's commentary then mounts an eight-part argument for why such a consciousness must exist at all, addressing eight distinct kinds of ordinary experience that make no sense without it.
1. Mind: Three Names for the Ālayavijñāna
云何建立識蘊？謂心、意、識差別。何等為心？謂蘊界處習氣所熏一切種子阿賴耶識。亦名異熟識，亦名阿陀那識，以能積集諸習氣故。
How is the aggregate of consciousness established? As the distinction between mind, manas, and consciousness proper.
What is mind? The ālayavijñāna, perfumed by the habitual traces of the aggregates, elements, and sense fields, and holding every seed. It is also named the ripening consciousness, and also named the ādāna-consciousness, since it is capable of gathering and accumulating every habitual trace.
T1606 glosses each name in turn. "Habitual trace" (習氣) is what is left behind when the aggregates and the rest actually manifest, further enriching their own seeds — a seed being simply the capacity, gathered within this consciousness, to give rise to the aggregates and every other dharma. "Ālayavijñāna" names its function of storing away every dharma's seed, and, further, the fact that sentient beings mistake it for a self. "The ripening consciousness" names its origin: it is produced by prior karma. "The ādāna-consciousness" names its ongoing function: it is what allows a continuum to keep arising, moment after moment, and what holds the physical faculties intact so they do not degrade. This treatise, T1606 adds, also calls this same consciousness simply "mind" (心) for one further reason beyond all this: because it is what gathers and accumulates every dharma's habitual trace in the first place — mind, in the most basic sense, just is the accumulating function itself.
2. Eight Proofs That the Ālayavijñāna Must Exist
T1606 does not leave the ālayavijñāna's existence merely asserted. It opens with a single line stating the stakes — without this consciousness, eight distinct kinds of ordinary experience become impossible to account for — and then works through each in turn.
云何知有阿賴耶識？若無此識，執受、初、明了、種子、業、身受、無心定、命終無，皆不應理。釋此伽他，如攝決擇分說：由八種相，證阿賴耶識決定是有。謂若離阿賴耶識，依止執受不可得故、最初生起不可得故、明了生起不可得故、種子體性不可得故、業用體性不可得故、身受體性不可得故、處無心定不可得故、命終之識不可得故。
How is it known that the ālayavijñāna exists? If this consciousness did not exist, then appropriation, initial arising, clarified arising, the essence of seeds, the essence of karmic function, the essence of bodily feeling, abiding in a mindless attainment, and the consciousness present at death would all become impossible to account for. As the Viniścaya-saṃgrahaṇī explains this verse: by eight distinct marks, the ālayavijñāna is proven to certainly exist. That is: apart from the ālayavijñāna, a support capable of appropriation cannot be found; the initial arising of consciousness cannot be found; the arising of a clarified, attentive consciousness cannot be found; the essential nature of a seed cannot be found; the essential nature of karmic function cannot be found; the essential nature of bodily feeling cannot be found; abiding in a mindless attainment cannot be found; and the consciousness present at the moment of death cannot be found.
Proof One: Appropriation of a Living Body
云何依止執受不可得耶？由五因故，謂阿賴耶識先行因感眼等，轉識現緣因發，如說根境作意力故諸轉識生，乃至廣說，是名初因。又六識身善惡可得，是第二因。又六識身一類異熟無記性攝必不可得，是第三因。又六識身各別依轉，隨所依止彼識生時，即應彼識執所依止，餘無執受不應道理；設許執受亦不應理，以離識故，是第四因。又所依止應成數數執受過失。所以者何？由彼眼識於一時轉一時不轉，餘識亦爾，是第五因。
Why can no support capable of appropriation be found apart from it? For five reasons. First, the ālayavijñāna, through a prior causal condition, brings about the eye faculty and the rest, while the active consciousnesses arise through a present condition — as is said, the active consciousnesses arise through the power of faculty, object, and attention, and so on at length. Second, the six active consciousnesses can be wholesome or unwholesome, and so cannot be what appropriates the body, since only an ever-neutral ripened result could serve that role continuously. Third, the six active consciousnesses, being of a single, uniform, neutral ripened nature throughout, are precisely what could never actually be found among the six — they are wholesome or unwholesome, never uniformly neutral. Fourth, since each of the six active consciousnesses depends on its own separate physical faculty, whenever that consciousness arises it alone would have to appropriate its own support, leaving every other faculty with no appropriation at all — an untenable result; and even granting that some appropriation occurs, it could not do so apart from a continuously present consciousness. Fifth, the very faculty relied upon would be repeatedly appropriated and un-appropriated, since the eye-consciousness, for instance, is sometimes active and sometimes not, and the same holds for every other active consciousness.
The whole first proof turns on a simple, physical observation already used elsewhere on this site (in the Mahāyānasaṃgraha's own treatment of the ādāna-consciousness): a living body's faculties remain intact and functioning for as long as life continues, and only ever begin to decay the instant something departs at death. The six active consciousnesses — eye-consciousness and the rest — cannot be what is doing this continuous work of "appropriation," since each one switches on and off constantly (the eye-consciousness stops the moment the eyes close), is sometimes wholesome and sometimes unwholesome in moral quality, and depends on only one faculty at a time rather than the whole body at once. Something else, uniformly present and uniformly neutral, must be doing this appropriating work throughout — and that is exactly the role the ālayavijñāna is proposed to fill.
Proof Two: The Impossibility of Two Consciousnesses Starting Together
云何最初生起不可得耶？謂設有難言：若有阿賴耶識，應一有情二識俱起。應告彼曰：汝於非過妄生過想，容有二識俱時轉故。所以者何？猶如有一俱時欲見乃至欲識，隨有一識最初生起不應道理。何以故？爾時作意無有差別，根及境界不壞現前，何因緣故識不俱轉？
Why can the initial arising of consciousness not be found otherwise? Suppose an objection is raised: if the ālayavijñāna existed, a single sentient being would have two consciousnesses arising at once. The reply: you mistake what is no fault at all for a fault, since two consciousnesses arising together is entirely possible. Why? Consider someone who simultaneously wishes to see, hear, and so on through every sense at once — there is no reason only one consciousness, and not several, should be the first to arise in such a case. Why not? Because, at that moment, attention is not differentiated between the senses, and the faculties and their objects are all equally unimpaired and present — so what cause could possibly prevent every consciousness from arising together?
Proof Three: Clarified, Attentive Cognition
云何明了生起不可得耶？謂若有定執識不俱生，與眼等識俱行一境，明了意識應不可得。所以者何？若時隨憶曾所受境，爾時意識不明了生。非於現境所生意識，得有如是不明了相，是故應信諸識俱轉，或應許彼第六意識無明了性。
Why can the arising of a clarified, attentive consciousness not be found otherwise? If one insists that consciousnesses can never arise together, then a clarified mental consciousness accompanying eye-consciousness and the rest, taking the very same object, should become impossible. Why? Because whenever mental consciousness merely recalls a previously experienced object, it arises without clarity — yet a mental consciousness that arises together with a presently perceived object plainly does not lack this clarified character. One must therefore accept either that consciousnesses do arise together, or else that this sixth, mental consciousness has no capacity for clarified cognition at all — which no one actually holds.
Proofs two and three work together against a single rival assumption: that only one consciousness can ever be active at a time. Proof two shows this assumption cannot even explain why the very first moment of experience — hearing a bell while also seeing it ring and smelling the room, all genuinely at once — has any privileged single consciousness that "goes first," when nothing distinguishes the conditions for any one sense over another. Proof three sharpens the same point through a contrast anyone can verify in their own experience: recalling a sound from memory feels hazy, while actually hearing a sound right now, accompanied by full mental clarity about what it is, feels sharp and immediate — a difference the one-consciousness-at-a-time theory has no way to explain, since it would need to say a single mental consciousness is somehow both merely recalling and immediately perceiving in the very same moment, an inherent contradiction.
Proof Four: A Seed's Own Essential Nature
云何種子體性不可得耶？謂六轉識身各各異故。所以者何？此六轉識從善無間不善性生、不善無間善性復生、從二無間無記性生，下界無間中界生、中界無間妙界生、妙界無間乃至下界生，有漏無間無漏生，無漏無間有漏生，世間無間出世生、出世無間世間生，非如是相識為種子體應正道理。又心相續長時間斷，經久流轉不息，是故轉識能持種子不應道理。
Why can a seed's own essential nature not be found otherwise? Because the six active consciousnesses are each mutually distinct: a wholesome moment is immediately followed by an unwholesome one, an unwholesome moment by a wholesome one, and either by a morally neutral one; the desire realm is immediately followed by the intermediate realm, the intermediate by the exalted, and the exalted, in turn, eventually by the desire realm again; a contaminated moment is immediately followed by an uncontaminated one, and an uncontaminated by a contaminated one; a mundane moment is immediately followed by a supramundane one, and a supramundane by a mundane one. Consciousness of so shifting, discontinuous a character cannot reasonably be what holds a seed's essential nature. Furthermore, the active consciousnesses' continuum breaks off for long stretches at a time — as in the two mindless attainments — and so, over such long interruptions, it is likewise unreasonable that the active consciousnesses could be what sustains a seed at all.
Proof Five: Karmic Function
云何業用不可得耶？謂若無諸識同時生起，業用俱轉不應道理。所以者何？略說識業有四種，謂了別外器、了別依止、能了別我、了別境界。如是四種識了別業，一一剎那俱現可得，非於一識一剎那中有如是等差別業用，是故必有諸識俱起。
Why can the essential nature of karmic function not be found otherwise? If consciousnesses did not arise together, their karmic functions could not operate together either. Why? Briefly, consciousness's karmic function is of four kinds: discriminating the external container world, discriminating one's own physical support, discriminating a sense of self, and discriminating a sense object. All four of these functions are plainly present together, moment by moment — no single consciousness, in a single moment, could exercise all these distinct functions by itself. Therefore, several consciousnesses must be arising together.
Proof Six: Bodily Feeling
云何身受體性不可得耶？謂如有一，或如理思、或不如理思、或不思惟、或復推尋，若心在定若不在定，身受生起非一眾多。若無阿賴耶識，如是身受應不可得；既現可得，是故定有阿賴耶識。
Why can the essential nature of bodily feeling not be found otherwise? Consider someone who is, at a given moment, thinking correctly, thinking incorrectly, not thinking at all, or actively deliberating — whether their mind is concentrated or not, manifold bodily feelings continue to arise regardless. Without the ālayavijñāna, such bodily feeling ought to be impossible to find; yet it is plainly, presently found — therefore the ālayavijñāna certainly exists.
Proofs four through six each target a different feature of experience that the six shifting, interruptible active consciousnesses cannot account for on their own. A seed — the capacity for a wholesome or unwholesome act to bear fruit much later — needs an unbroken continuum to be stored in, but the active consciousnesses constantly flip between wholesome, unwholesome, and neutral, and even stop altogether during deep meditative absorption; nothing so discontinuous could reliably hold anything in trust across such gaps. The four simultaneous karmic functions of consciousness (proof five) are a direct echo of what ordinary experience actually feels like: right now, one is dimly aware of the room, aware of one's own body, aware of a sense of "I," and aware of some specific object of attention — all at once, not one after another — which a strictly single-consciousness-at-a-time model cannot produce. And bodily feeling (proof six) is the most intimate example: sensation continues in the body even while the mind is absorbed elsewhere entirely, in correct or incorrect thought, or in no thought at all — proof, on this argument, that something beneath the six active consciousnesses is what actually carries feeling forward moment to moment.
Proof Seven: Abiding in a Mindless Attainment
云何處無心定不可得耶？如世尊說：入無想定及滅盡定，當知爾時識不離身。若無阿賴耶識，爾時識應離身，識若離身便應捨命，非謂處定。
Why can abiding in a mindless attainment not be found otherwise? As the World-Honored One said: know that, upon entering the attainment without perception or the attainment of cessation, consciousness at that time has not departed from the body. Without the ālayavijñāna, consciousness would have to depart from the body at that time — and if consciousness departed from the body, this would mean death, not merely the entering of an attainment.
Proof Eight: The Consciousness Present at Death
云何命終之識不可得耶？謂臨命終時識漸捨離所依身分，發起冷觸或上或下，非彼意識有時不轉。故知唯有阿賴耶識，能執持身隨於身分。若捨此識，冷觸可得身無覺受，意識不然。是故若無阿賴耶識，命終之識必不可得。
Why can the consciousness present at the moment of death not be found otherwise? At the time of dying, consciousness gradually withdraws from the parts of the body it depends on, and a coldness arises, moving either upward or downward through the body — yet mental consciousness itself is not something that operates only sometimes and stops at other moments in this specific, gradual way. Hence it is known that only the ālayavijñāna is capable of holding the body together, part by part. Once this consciousness has withdrawn from a given part, that part becomes cold and loses all sensation — mental consciousness does not withdraw in this piecemeal fashion at all. Therefore, without the ālayavijñāna, the consciousness present at the moment of death could never be found.
The last two proofs both turn on cases where the six active consciousnesses are demonstrably absent, yet the body remains unmistakably alive. In the two mindless attainments, an accomplished meditator has deliberately stilled every active mental function — by the Buddha's own testimony, this is not death, precisely because "consciousness has not departed from the body." And at the ordinary moment of dying, observed coldness spreads gradually, part by part, rather than the body losing sensation everywhere at once — exactly the piecemeal pattern one would expect if some single consciousness were withdrawing its hold on the body region by region, and exactly what mental consciousness (which either is or is not active, with no such gradual, spatially-distributed withdrawal) could never produce on its own. Both cases point to the same conclusion the whole eightfold argument has been building toward: something continuous, body-wide, and independent of the six active consciousnesses must be what holds a living body together — and that is the ālayavijñāna.
3. Manas, and the Six Consciousnesses
何等為意？謂一切時緣阿賴耶識思度為性，與四煩惱恒相應，謂我見、我愛、我慢、無明。此意遍行一切善不善無記位，唯除聖道現前，若處滅盡定及在無學地。又六識以無間滅識為意。
What is manas? Its nature is constantly deliberating, at every moment, taking the ālayavijñāna as its object, and it is constantly associated with four afflictions: the view of self, love of self, conceit of self, and ignorance. This manas operates pervasively through every wholesome, unwholesome, and morally neutral state, except when the noble path is actually manifest, or one abides in the attainment of cessation, or has reached the stage beyond further training. Further, for the six consciousnesses, the immediately preceding, just-ceased consciousness is itself also called manas.
何等為識？謂六識身：眼識、耳識、鼻識、舌識、身識、意識。何等眼識？謂依眼緣色了別為性。何等耳識？謂依耳緣聲了別為性。何等鼻識？謂依鼻緣香了別為性。何等舌識？謂依舌緣味了別為性。何等身識？謂依身緣觸了別為性。何等意識？謂依意緣法了別為性。
What is consciousness proper? The six bodies of consciousness: eye-consciousness, ear-consciousness, nose-consciousness, tongue-consciousness, body-consciousness, mental consciousness. What is eye-consciousness? Its nature is discriminating, depending on the eye, taking form as its object. What is ear-consciousness? Its nature is discriminating, depending on the ear, taking sound as its object. What is nose-consciousness? Its nature is discriminating, depending on the nose, taking smell as its object. What is tongue-consciousness? Its nature is discriminating, depending on the tongue, taking taste as its object. What is body-consciousness? Its nature is discriminating, depending on the body, taking touch as its object. What is mental consciousness? Its nature is discriminating, depending on the mental faculty, taking dharmas as its object.
T1606 explains why the defiled manas falls silent in exactly the three states named: when the noble path is directly manifest, the wisdom that sees ultimate reality stands in direct opposition to the view of self, so the two cannot coexist in that moment — though manas resumes taking the ālayavijñāna as "self" again once that moment of direct realization passes, for anyone still short of full liberation. The attainment of cessation, being even more profoundly still than the attainment without perception, likewise leaves no room for this self-grasping manas to operate. And one who has reached the stage beyond further training — an arhat — has uprooted self-grasping for good, so it can never arise again in any state. T1606 also flags a second, distinct sense of "manas" the treatise names almost in passing: for any of the six active consciousnesses, the consciousness that has just ceased, immediately prior, itself also functions as manas, in the specific sense of serving as the immediately-antecedent condition for the consciousness that follows it — a different, narrower usage from the self-grasping manas defined just above.
Part 8 Complete
The aggregate of consciousness — mind, manas, and consciousness proper, with the full argument for why a consciousness beneath the six active ones must exist — is now established, closing the treatise's account of all five aggregates. Part 9 turns to the eighteen elements and twelve sense fields in their fuller construction, including the eight unconditioned dharmas, before closing the three categories with the treatise's own account of what "aggregate," "element," and "sense field" actually mean.
Continue to Part 9 — Elements, Sense Fields, and What the Three Categories Mean →