The Inward Gate Opens Back

I. An Inward Gate That, Walked to Its End, Opens Back

A reader who comes to "concentration" with a background in modern sitting practice tends to imagine it as a road that runs only deeper: the longer one sits, the stiller; the stiller, the deeper — as though the goal were to reach some innermost room where one can no longer be disturbed. The thirty papers of this volume have walked their road precisely in order to dismantle that intuition. Concentration (samādhi) is indeed a gate that gathers inward — the fifth of the Six Gates, the inward gate — but its deepest step is not to shut the door more tightly. It is to let the door open back toward the light.

This reversal is not the author's invention; it is the gate's own architecture. At the outset of his search the Buddha apprenticed himself to two teachers renowned for the formless absorptions, attained for himself the highest states they taught, and then set them down. The reason he set them down is held in a single line of the Rāma Sutta: a concentration of that kind "does not tend toward knowledge, does not tend toward awakening, does not tend toward nirvāṇa."¹ A pure, absolute abiding can be unfathomably deep and still not open onto seeing — and is therefore not ultimate. The second paper of this volume (P02, Beneath the Rose-Apple Tree and the Two Teachers) set this episode of abandoning the formless attainments as the seed of the whole volume's thesis: that the Buddhist right concentration (sammā-samādhi) is not the same as the non-Buddhist absolute formless absorption. What this closing paper does is to make good on that seed — to let the sentence planted at the head of the volume, concentration must return to wisdom, come to fruit at its close.

As the volume's closing paper, this one does not open a new argument; it looks back and gathers in, carrying three tasks. The first is to lock the two ends together: to join the boundary set at the volume's head (P02) to the thesis made good at its close (this paper), so that "the Buddha abandons the formless attainments" and "concentration returns to prajñā" lie locked, head and tail, along one line. The second is the nine-Part retrospective: to travel the spine that runs the length of the volume — the ladder of the four jhānas — and mark, Part by Part, the defining work each scripture and treatise performed upon "concentration," watching how this gate was read ever deeper and then, at its very depth, read open. The third is the loop from concentration to wisdom: to establish, with the Heart Sūtra and the Treatise on the Great Perfection of Wisdom, the sense in which concentration returns to prajñā, thereby closing the loop of the three trainings, and to hand the sequence's final close — respectfully — back to the gate that stands after concentration.

A measure must be fixed first. From beginning to end this volume has held to the samatha pole of concentration — the still — and not to the study of wisdom itself. "Concentration returns to prajñā" points a direction; it does not unfold prajñā here. Wisdom is the home ground of a different series of books; this paper lays down only a single bridging line — that concentration, walked to its end, turns back toward wisdom — and does not cross over to say what wisdom is. In the same way, the narrative detail of the Buddha's abandoning of the formless attainments belongs to P02, the mechanism of the joint practice of stilling and insight (samatha–vipassanā) to P03, and the systematic treatment of the three trainings to this volume's thirteenth paper and the framework of the Saṃdhinirmocana's chapter on the analysis of yoga; this paper takes from each only the face that points toward the opening-back.

II. Locking the Two Ends: The Buddha Abandons the Formless Attainments, and Concentration Is Not Ultimate

To lock a volume's thesis at its two ends is the work not of coincidence but of a single doctrinal line.

The boundary set at the volume's head came from a choice the Buddha made for himself. Apprenticed to Āḷāra Kālāma (Āḷāra Kālāma) he attained the sphere of nothingness; apprenticed to Uddaka Rāmaputta (Uddaka Rāmaputta) he attained the sphere of neither-perception-nor-non-perception — the two highest formless absorptions then known. Yet he did not stop. He judged and departed in these terms:

This dharma does not tend toward knowledge, does not tend toward awakening, does not tend toward nirvāṇa. I had now better set this dharma aside and seek instead the unailing, unsurpassed, secure rest of nirvāṇa.¹

The weight of this line lies in its coming from the mouth of one who had already reached the state in question. He set the formless attainments down not because he could not reach them but because, having reached them, he saw clearly: an abiding, however pure, does not of itself tend toward knowledge, toward awakening, toward nirvāṇa. A detail here is easily missed — the sphere of nothingness and the sphere of neither-perception-nor-non-perception were the two highest and stillest absorptions then known. The Buddha did not pronounce this verdict from some low, scattered vantage; he stood at the very summit of concentration, looked down, and still said it "does not tend toward nirvāṇa." This seals off the most tempting line of retreat. One always supposes that if only one could go a little deeper, sit a little stiller, the problem would resolve itself; the Buddha tells us, at the deepest and stillest point, that depth and stillness do not of themselves reach the ultimate. Concentration can gather the mind to an utmost stilling, but it cannot stand in for seeing. From this the Buddha drew a doctrinal boundary: what makes right concentration right is not how deep it goes but that it is set toward the wisdom that liberates.

This boundary is one of the two endpoints of the volume's whole doctrinal arc. P02 set it as a seed; after twenty-nine papers of layer-upon-layer description of concentration, this closing paper must make good on its other end: a pure, absolute concentration is not ultimate, and concentration must return to wisdom. The volume's head asks why the Buddha abandoned; its close asks where, having been abandoned, concentration ought to go — and the answer is the opening-back, the turn toward prajñā. With that, the two ends lock: not two propositions set side by side, but one proposition's seed and fruit. That this volume opened from a narrative — the Buddha's search and his choice — rather than from a definition was precisely so that this seed would carry concrete weight: not an abstract doctrine but a choice made, by hand, by one who had already attained.

It is worth marking that this line does not negate concentration; it situates it. To abandon the formless attainments is to abandon not concentration but the clinging that takes concentration for a terminus. The Buddha abandoned his teachers' concentration, yet what he set up in its place was still a concentration — the four jhānas — only now re-placed upon the road that leads toward wisdom. One and the same "concentration" is, for the outside teachers, a terminus, and for the Buddha, a path-factor: the difference lies not in the depth of the concentration but in whether it is set toward wisdom. This distinction is the one thing this volume says over and again, and the one thing most easily lost today — cut concentration away from the wisdom it is set toward, and concentration falls back into exactly the kind the Buddha once abandoned, the kind that "does not tend toward nirvāṇa." The retrospective that follows watches just this: how this gate was, across twenty-nine papers, re-placed again and again, and how it held throughout to one and the same direction.

III. The Road Walked: The Four-Jhāna Ladder, from Establishing to Opening Back

The spine that runs the length of this volume is the ladder of the Pāli four jhānas, together with the sequence by which the jhāna-factors (applied and sustained thought, joy, pleasure, one-pointedness of mind) are shed, stage by stage. Nine Parts each performed one defining piece of work upon this ladder. Read in sequence, the nine pieces compose a single complete motion — from setting concentration up to reading concentration open.

From the Pāli to Prajñā (Parts I–V).

Part I established the ladder itself at the Pāli root. The structure of the four jhānas and the four formless attainments, and the sequence by which the factors are shed stage upon stage — the first jhāna leaving behind the coarseness of applied thought while sustained thought remains, the second born of joy-and-pleasure, the third setting joy aside to abide in pleasure, the fourth setting aside pleasure-and-pain so that only the purity of equanimity-and-mindfulness remains and one-pointedness of mind stands alone — this shedding-sequence from many to one is the archetype relit again and again across the volume. What deserves remembering: the moment the ladder is set up, its direction is already letting-go — each higher rung is a release of the factor clutched on the rung below. Concentration was never, from the first, an accumulation; it was a subtraction. That undertone shows its full weight only at the volume's close.

Part II joined this ladder to the path-doctrine of the Āgama, bringing right concentration forward as a path-factor. Right concentration (sammā-samādhi) is the four jhānas, listed as the eighth limb of the Noble Eightfold Path. To enroll concentration among the eight limbs is to say that it was never a "supernormal technique" to be extracted and cultivated on its own — it is one link in the path, with right mindfulness before it as support and right view above it as governance, itself pointing elsewhere and not at itself. Once concentration is set back into the texture of the path, "concentration as terminus" is already structurally overruled.

Part III systematized the study of concentration in the Abhidharma and the Path of Purification. The forty meditation-objects are arrayed along three axes — by temperament, by object, by stage; which objects can reach only access concentration (upacāra) and which can enter absorption proper (appanā) is adjudicated case by case. At this point the inward gate becomes a verifiable chart — concentration is no longer a vague "going into a trance" but a thing-to-be-cultivated with structure, with stages, with criteria.

Part IV recorded the Mahāyāna turn, reading concentration as non-abiding. The bodhisattva enters and leaves concentration at will, neither relishing the savour of concentration nor settling into its actuality — concentrated, yet not bound by concentration. This is a crucial loosening: the first three Parts set concentration up, enrolled it in the path, systematized it; the fourth says plainly, for the first time, that even abiding within concentration is itself to be let go. The ladder's direction — letting-go — is pressed a step further here: not only are the jhāna-factors set down, but so is the posture of "abiding in concentration."

Part V is prajñā's encounter with concentration, and Mañjuśrī's home ground, pressing concentration toward dissolution. The prajñā corpus criticizes the clinging that "relishes the savour of concentration" and "abides in samādhi"; Mañjuśrī's sword cuts precisely at the subtlest layer of dharma-clinging within concentration — not coarse distraction but the practitioner's faint grasping at his own attained state, at the very fact that "I have let go." Even the clinging to one's own release of the four jhānas is itself ungraspable. By this point the ladder is no longer about climbing higher; it is about setting down the handrail, and even the thought "I am letting go," along with everything else.

From the Śūraṅgama to Chan (Parts VI–VII).

Part VI used the Śūraṅgama to set another kind of concentration in contrast. The Heroic-March great samādhi is not one rung among the four jhānas and eight attainments but a great concentration carried through from beginning to end, never apart from walking, standing, sitting, lying down — it is not established by entering some state, and shows itself rather in never departing from daily use. Set beside it, the fifty skandha-māras are arrayed as a doctrinal chart of the byways within concentration: a marking of where this gate may open onto illusion rather than wisdom, and which "superior states" are in fact detours. The chart is itself a reminder — depth of concentration does not equal clarity of wisdom; the deeper the concentration, the more it needs wisdom to discern it.

Part VII is Chan, and the largest structural difference between this volume and the three before it: it lets the study of concentration depart the ladder altogether. Chan's "non-duality of concentration and wisdom" turns concentration from a state to be attained (jhāna-as-attainment) into the living concentration of "being amid forms yet free of forms" — concentration is the body of wisdom, wisdom is the function of concentration, the two neither sequential nor two things. In other words, Chan no longer asks "how to enter a deeper concentration" but "concentration and wisdom were one matter all along; when were they ever divided?" This is the volume's largest pivot: concentration is no longer a room to enter but a seeing, never apart from daily use, immediate and here. At this point the ladder is all but deconstructed — but what deconstructs it is not a falling-away; it is wisdom's thorough seeing.

From the Lotus and Huayan to the Modern (Parts VIII–IX).

Part VIII used the Lotus and Huayan to totalize concentration to the limit of its outward reach. The Lotus's concentration-as-conduct in the "Peaceful Practice" spreads across all four postures, so that concentration is not confined to sitting; the Ocean-Seal samādhi (sāgaramudrā-samādhi) — as a still sea seals forth the myriad images — makes the whole dharma-realm appear at once within a single thought, concentration pressed to the widest reach it can attain. If Chan dissolved concentration inward until it could be dissolved no further, Huayan pressed it outward until it could be widened no further. The inmost pole and the outmost pole are touched here at once.

Part IX then turns, and returns. Its first paper (P29) diagnoses two modern disqualifications of concentration: one that takes concentration for a stress-relief tool to be bought, one that uses sitting to flee what ought to be faced — outwardly opposed, yet rooted in the same thing, both being concentration severed from wisdom. Tradition long ago diagnosed this twin ailment and prescribed the one medicine — the wisdom of insight. Its second paper (P30) examines a new external condition specific to our moment: the attention economy of the algorithm structurally shatters the mind into many points, pressing upon the very one-pointedness of mind (ekaggatā) that concentration requires — AI is a contributing condition to concentration, favourable or adverse, and not a cause able to destroy or to make concentration. Together the two papers trace the question "what does concentration spoil into when severed from wisdom" from the ancient savour-clinging and dark certification all the way to the screens and algorithms of the present. By this closing paper, the road of return reaches its end: what waits at the deepest point is not yet another deeper concentration but an opening-back.

The nine pieces of work join into one sentence: this gate of concentration was set up, enrolled in the path, systematized, read as non-abiding, dissolved by prajñā, set in contrast by the Śūraṅgama, deconstructed by Chan, totalized by Huayan — and yet, at its very depth, read open: opened toward wisdom. The end of the ladder is not a summit but a turning; and that turning was, from the moment the jhāna-factors first began to shed in Part I, already set in this direction.

IV. From Concentration to Wisdom: In Dependence on the Perfection of Wisdom

The "opening-back" is not a lyrical gesture but a structure for which scripture and treatise stand surety. This volume sets the keystone of that structure on a single line of the Heart Sūtra.

Near its close, the Heart Sūtra binds the bodhisattva's "ultimate nirvāṇa" plainly and explicitly to prajñā:

The bodhisattva, in dependence on the perfection of wisdom, has a mind without hindrance; without hindrance, there is no fear; far removed from inverted, dreamlike thinking, he reaches ultimate nirvāṇa. All Buddhas of the three times, in dependence on the perfection of wisdom, attain anuttarā-samyak-saṃbodhi, unsurpassed perfect awakening.²

Everything turns on the word "in dependence." The bodhisattva can reach ultimate nirvāṇa not because his concentration is deep enough but "in dependence on the perfection of wisdom." In other words, the deepest point of concentration — the place this volume has called the end of the inward gate — has its ultimacy written for it by those four words, in dependence on wisdom. Concentration does not reach the ultimate on its own; concentration, walked to its end, must lean upon prajñā before it can open onto ultimate nirvāṇa. This is the scriptural warrant for "the inward gate opens back": the gate gathers inward to the utmost, yet it is in dependence on prajñā that it opens outward, upward, and back. Read together with the Buddha's abandoning of the formless attainments at the volume's head, the two-ended lock clinches shut: the teachers' formless concentration "does not tend toward nirvāṇa" precisely because it does not depend on prajñā; the Heart Sūtra's ultimate nirvāṇa is "in dependence on the perfection of wisdom" precisely as the supplying of that missing link. What the Buddha abandoned was not concentration but a concentration "not dependent on prajñā, taking itself for the ultimate"; the four jhānas he set up in its place were, from Part I onward, placed upon the path and set toward wisdom — a concentration that depends on prajñā.

This also answers the question left open at the volume's head. When the Buddha abandoned the formless attainments he did not say concentration was useless, only that a concentration of that kind "does not tend toward nirvāṇa." What the Heart Sūtra supplies is exactly the direction of that "tending" and what it leans upon: for concentration to tend toward nirvāṇa, what it relies upon is not its own purity but prajñā. So "abandoning" and "depending" meet here — what is abandoned is the clinging that takes concentration for a terminus; what is depended on is the wisdom that lets concentration open onto the ultimate. Between one abandoning and one depending, the volume's thesis comes round whole.

The Treatise on the Great Perfection of Wisdom then states the mechanism of this "depending" more finely. With the image of a lamp in a windless room, the treatise shows why concentration is wisdom's support and not its terminus:

This abiding bliss of nirvāṇa is born of true wisdom; true wisdom is born of one-pointed meditative concentration … set the lamp in a sealed chamber, and its use is complete.³

A lamp set in a draughty place gutters, its flame wavering, its light unusable; set in a sealed room where no wind comes to disturb it, the lamp's light at last comes into full use. One-pointed meditative concentration stands to true wisdom as that sealed room to the lamp's flame: concentration is not the light itself; concentration is the condition by which the lamp of wisdom can settle, hold still, and give its full light. Nirvāṇa is born of true wisdom, and true wisdom is born in turn of one-pointed concentration — this chain of arising says the role of concentration as plainly as can be: concentration is wisdom's support, not its substitute; to take concentration for a terminus is to leave the lamp at the draughty doorway, where its light will never come to its full. The aptness of the image lies in its neither demeaning nor exalting concentration: without the sealed room the lamp cannot be lit, cannot last; but the sealed room itself gives no light. The worth of concentration lies just here, in its willingness to be the sealed room — its fulfilment lying not in being seen itself but in letting another thing's light come to its full use. That shedding-sequence "from many to one," marked in the nine-Part retrospective above, shows its terminus here: one-pointedness of mind gathered to the utmost, not in order to rest at that one point, but so that the lamp of wisdom may burn at its fullest where no wind comes.

And this chain the treatise joins into the round of the three trainings:

As the keeping of moral discipline can give birth to meditative concentration, so meditative concentration can give birth to true wisdom.⁴

Discipline gives birth to concentration, concentration to wisdom — this is the very sequence of the three trainings: sīla (moral discipline), samādhi (concentration), prajñā (wisdom). Read this volume, SAMĀDHI, together with the preceding volume, SĪLA, and the stretch "discipline → concentration" is already walked; and what this paper establishes, "concentration returns to prajñā," walks the last stretch, "concentration → wisdom." With that, the round of the three trainings closes: discipline lays down the behavioural bounds for concentration, concentration readies the windless room for wisdom, and the lamp of wisdom is lit into its full and complete light. Concentration's return to prajñā is not concentration's failure or supersession; it is concentration finally accomplishing the work it was always truly for — being wisdom's support. The reason the inward gate must open back is not that it took a wrong road, but that this gate was, all along, made so that the light behind it could shine out.

V. The Volume's Seam: Closing the Three Trainings, Handing Off to the Final Gate

Set the three lines of scripture and treatise above side by side, and the closing paper's task is clear: to close the round of the three trainings — concentration to wisdom. This is SAMĀDHI's own act of closure. It makes good, as fruit, the seed of the Buddha's abandoning of the formless attainments planted at the volume's head, in the proposition "concentration must depend on prajñā, returning toward true wisdom"; it takes the "discipline → concentration" stretch walked by reading SĪLA and SAMĀDHI together, and adds to it the stretch "concentration → wisdom," so that the round of the three trainings comes round and closes here. With that, this volume's proper task is fulfilled.

Yet that line of the Heart Sūtra did not stop at "ultimate nirvāṇa." After the bodhisattva's ultimate nirvāṇa it went straight on: "All Buddhas of the three times, in dependence on the perfection of wisdom, attain anuttarā-samyak-saṃbodhi." From the bodhisattva's ultimate nirvāṇa to all Buddhas' attainment of unsurpassed awakening, there is yet one step. But that step is not this volume's business. "Ultimate nirvāṇa" is the bodhisattva's own ultimate, the deepest point that this inward gate of concentration can deliver; and "the attainment of anuttarā-samyak-saṃbodhi" belongs to all Buddhas of the three times — to another gate, the last gate that stands after concentration in the sequence of the Six Gates, whose accomplishment that gate is to bear. Concentration is the fifth gate, the inward gate; it walks as far as "ultimate nirvāṇa," and there it hands the baton on, with respect. How that final step is walked, and by which gate in what sense, has its own home of scripture and treatise; this paper neither borrows it forward nor reveals it in that gate's stead. The volume's close reaches only this far: to bring the round of the three trainings shut, to leave the seam well made, and — toward the gate not yet opened for discussion — to point, lightly, once.

VI. Where to Begin: The Posture the Buddha Already Took

Having walked thirty papers, what is finally to be said is not a set of instructions for how to sit. This volume has been, from beginning to end, a book of description and not a manual; the closing paper, least of all, will hand the reader a sudden set of steps at the end. "Where to begin," here, is not the starting point of an action but a posture long since set in place — the posture the Buddha had already taken in the scriptures.

That posture is the one the Buddha took in the Rāma Sutta: having entered the deepest concentration, he did not take it for a terminus but asked — does this tend toward knowledge, toward awakening, toward nirvāṇa? This is not an operating instruction but an orientation. It asks the reader to attain no state; it points out only where concentration was, all along, set to open. This volume will not say "you ought to keep concentration joined to wisdom in such-and-such a way"; it points out only that concentration, severed from wisdom, has long been named by the tradition a disqualification — and that the Buddha, at the very beginning, had by his departure already demonstrated the right orientation once. To take up this posture is to receive it, not to be invited into it; it is to see clearly the architecture this gate already has, not to be handed a fresh assignment.

This is why, across thirty papers, not one has taught anyone how to sit. Not because the author withholds, but because the "place to begin" on this road lies not in some technique but in a sense of direction long since set in place by scripture and treatise. What a reader gains, having read the whole volume, is not a higher method for entering concentration but a pair of eyes that can discern: knowing that a deep concentration is not the same as a clear wisdom, knowing that abiding in concentration is itself to be let go, knowing that this inward gate was, in the end, made to open back toward wisdom. These eyes are themselves the realization, at the reader's end, of "concentration returns to prajñā" — not one more thing to do, but a seeing of this thing as it already is.

From the angle of Western scholarship, the place of concentration and wisdom within the structure of the path has long been described with precision. Rupert Gethin, in The Foundations of Buddhism (Oxford, 1998), sets out the relative positions of concentration and wisdom within the architecture of the path with considerable clarity.⁵ It can be granted that such accounts are morphologically accurate: concentration belongs to stilling, wisdom to insight, and the two have their distinct places along the path — the map is well drawn. A step further may be added: most such Western treatments rest at a descriptive morphology, ranging concentration and wisdom as two limbs set side by side, but do not read "concentration → wisdom" as a necessary opening-back of that very structure — do not read out the structural necessity written by the Heart Sūtra's word "in dependence" in "in dependence on the perfection of wisdom": concentration is not a limb beside wisdom but the limb that, in dependence on wisdom, opens onto the ultimate. A side-by-side relation says only that both are on the path; the relation of "dependence" says that concentration's very ultimacy is written by wisdom. The former is a map; the latter is an arrow upon the map, marking one direction. To the author's knowledge there is as yet no Western monograph whose central thesis is that "the inward gate opens back — the closed loop of concentration depending on prajñā to open toward wisdom, locked head and tail to the Buddha's abandoning of the formless attainments." This structural reading is what this paper offers to contribute. Its several components — the shedding-sequence of the four-jhāna ladder, the bodhisattva's non-abiding in the savour of concentration, prajñā's dissolution of the clinging to meditative states, Chan's non-duality of concentration and wisdom, the common root of the two modern disqualifications — lie scattered through the primary texts of the Parts surveyed above and through the two keystones, the Heart Sūtra and the Treatise on the Great Perfection of Wisdom; what this paper has done is only to thread them onto one line, so that the direction that was always there comes into view.

And so the deepest step of this inward gate is held, by this volume, in a single line: the deepest concentration is one in which even the state of concentration is ungraspable. What can set down the very mark of concentration is not a deeper concentration but prajñā. Concentration gathers to the innermost, and yet that door turns not toward some further inward but toward the light, and opens back.

Meditative concentration gives birth to true wisdom.

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Primary Source Index

Short	Full Title	Number	Translator / Author
Madhyama Āgama	Madhyama Āgama	T0026《中阿含經》MadhyamāgamaT1, No. 26View on CBETA online reader ↗	trans. Gautama Saṅghadeva (Eastern Jin)
Heart Sūtra	Prajñāpāramitā-hṛdaya Sūtra	T0251《般若波羅蜜多心經》Prajñāpāramitā-hṛdayaT8, No. 251Xuanzang (Tang, 649 CE)View on CBETA online reader ↗	trans. Xuanzang (Tang)
Treatise on the Great Perfection of Wisdom	Dà zhìdù lùn (Mahāprajñāpāramitā-upadeśa)	T1509《大智度論》Mahāprajñāpāramitā-upadeśa-śāstraT25, No. 1509Kumārajīva (Later Qin, 405 CE)View on CBETA online reader ↗	attrib. Nāgārjuna; trans. Kumārajīva (Later Qin)

Pāli parallel: MN 26, Ariyapariyesanā Sutta, PTS Majjhima Nikāya i 163–167 (dual-track citation, reference number only, no modern translation cited). The scriptures and treatises of the surveyed Parts (P02–P30) are referred to according to their owning papers and are not re-entered into this index; only the three texts directly cited in the body of this paper are listed above.

References

• Gethin, Rupert. The Foundations of Buddhism. Oxford: Oxford University Press, 1998.

Cross-Reference

• SAMĀDHI P02, Beneath the Rose-Apple Tree and the Two Teachers: the narrative of the Buddha's abandoning of the formless attainments — "this dharma does not tend toward nirvāṇa" — is its home ground; the present paper takes the single line "does not tend toward nirvāṇa" as the seed locking the volume's two ends, and refers the narrative detail of the abandoning to that paper.
• SAMĀDHI P03, The Twin Track of Stilling and Insight / P13 (the three trainings): the mechanism of the joint practice of samatha–vipassanā and the systematic treatment of the three trainings are their home ground respectively; the present paper takes only the single sense "concentration → wisdom" to close the round of the three trainings, and refers their full frameworks to those two papers.
• SAMĀDHI P29, Two Disqualifications / P30, Concentration in the Age of AI: the two modern disqualifications of concentration and the modern external erosion of the conditions for concentration are what they diagnose; the present paper gathers the two into the nine-Part retrospective and turns them toward concentration's return to prajñā.
• PRAṆIDHĀNA (the gate of Vow, the final gate): the final close of the whole Six-Gate sequence, and the Heart Sūtra's "attainment of anuttarā-samyak-saṃbodhi," belong to the final gate; the present paper stops at the bodhisattva's "ultimate nirvāṇa" (concentration), hands off with respect, and does not borrow forward the business of the final gate.

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Paper: SAMĀDHI-P31 · The Inward Gate Opens Back · SAMĀDHI · Part IX · Modern Diagnosis and the Return to Prajñā Author: 釋慧鏡 (Shi Huijing) · Project: 指月 / Pointing-at-the-Moon · Series: The Six Practice Gates (六行門) License: CC BY-NC-SA 4.0 CBETA collation: Citations are verified against the CBETA Electronic Tripiṭaka — the Madhyama Āgama (trans. Gautama Saṅghadeva of the Eastern Jin, T0026《中阿含經》MadhyamāgamaT1, No. 26View on CBETA online reader ↗: fascicle 56, "Rāma Sutta," "this dharma does not tend toward knowledge, does not tend toward awakening, does not tend toward nirvāṇa; I had now better set this dharma aside," p. 0776c); the Prajñāpāramitā-hṛdaya Sūtra (trans. Xuanzang of the Tang, T0251《般若波羅蜜多心經》Prajñāpāramitā-hṛdayaT8, No. 251Xuanzang (Tang, 649 CE)View on CBETA online reader ↗: "the bodhisattva, in dependence on the perfection of wisdom … reaches ultimate nirvāṇa. All Buddhas of the three times, in dependence on the perfection of wisdom, attain anuttarā-samyak-saṃbodhi," p. 0848c); and the Treatise on the Great Perfection of Wisdom (attrib. Nāgārjuna, trans. Kumārajīva of the Later Qin, T1509《大智度論》Mahāprajñāpāramitā-upadeśa-śāstraT25, No. 1509Kumārajīva (Later Qin, 405 CE)View on CBETA online reader ↗: fascicle 17, the lamp in the sealed chamber, "this abiding bliss of nirvāṇa is born of true wisdom, true wisdom is born of one-pointed meditative concentration … set the lamp in a sealed chamber, and its use is complete," p. 0756c; fascicle 44, "as the keeping of moral discipline can give birth to meditative concentration, so meditative concentration can give birth to true wisdom," p. 0430a). Volume and page follow the Taishō. Pāli parallel MN 26, Ariyapariyesanā Sutta, PTS Majjhima Nikāya i 163–167, dual-track by reference number only, no modern translation cited. The full study of prajṇā / wisdom belongs to the eight-fold sister series and is not cross-referenced here. Gethin is cited by paraphrase only, for dialogue and contrast, not doctrinal equation. Repository: https://github.com/pointing-at-the-moon/six-practice-gates

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Concentration gathered to the innermost room: and the door it comes to is not a deeper inward but a turning — set in a windless place, the lamp it shelters burns at last to its full, and the light goes out, and back.

Footnotes

1. Madhyama Āgama, fascicle 56, "Rāma Sutta," T0026《中阿含經》MadhyamāgamaT1, No. 26View on CBETA online reader ↗, p. 0776c. The Buddha, having attained the sphere of nothingness with Āḷāra Kālāma and the sphere of neither-perception-nor-non-perception with Uddaka Rāmaputta, pronounced this judgment at both and abandoned them. Pāli parallel: MN 26, Ariyapariyesanā Sutta, PTS Majjhima Nikāya i 163–167 (dual-track citation; PTS reference only, no modern translation embedded). The narrative of the abandoning of the formless attainments is treated in full in this volume's P02; this paper takes only the single line "does not tend toward nirvāṇa" as the anchor locking the two ends. ↩ ↩²

2. Heart Sūtra (Prajñāpāramitā-hṛdaya), T0251《般若波羅蜜多心經》Prajñāpāramitā-hṛdayaT8, No. 251Xuanzang (Tang, 649 CE)View on CBETA online reader ↗, p. 0848c. ↩

3. Treatise on the Great Perfection of Wisdom (Dà zhìdù lùn), T1509《大智度論》Mahāprajñāpāramitā-upadeśa-śāstraT25, No. 1509Kumārajīva (Later Qin, 405 CE)View on CBETA online reader ↗, fascicle 17, p. 0756c. The image of the lamp in the sealed chamber: concentration is wisdom's support, not its terminus. ↩

4. Treatise on the Great Perfection of Wisdom, T1509《大智度論》Mahāprajñāpāramitā-upadeśa-śāstraT25, No. 1509Kumārajīva (Later Qin, 405 CE)View on CBETA online reader ↗, fascicle 44, p. 0430a. The chain of arising, discipline → concentration → wisdom. The systematic treatment of the three trainings is given in this volume's P13 and the framework of the Saṃdhinirmocana's chapter on the analysis of yoga; this paper takes only this single line as the anchor closing the round of the three trainings. ↩

5. Rupert Gethin, The Foundations of Buddhism (Oxford: Oxford University Press, 1998). ↩