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五受根

pañca-vedanendriya

苦乐忧喜舍五种感受之根AI-generated

Type Mental factorDifficulty IntroductoryTruth-level span I · dependent arising ⇢ II · emptinessInitial AI estimate · evolves with use

五受根摄于受蕴与二十二根,立于缘生(第一重);『受想行识亦复如是』属正面重释,可至性空(第二重)。

A Contemporary ReadingAI-generated

*A contemporary reading of* pañca vedanendriyāṇi *— the five feeling-roots inside the body-mind's economy*


There is a small but consequential group of five that sits inside the *Abhidharma* inventory of twenty-two *indriya* (根, faculties / dominant factors). They are called 五受根 (*pañca vedanendriyāṇi*) — the five feeling-faculties: (*dukkha*), (*sukha*), (*domanassa*), (*saumanasya*), (*upekkhā/upekṣā*). They are not just emotions, not just "good or bad vibes," and emphatically not the same as the English word *feeling*, which the modern mind tends to stretch until it covers everything from a sore knee to a heartbreak. The classical sources — most clearly the *Abhidharmakośa* (*Apidamo Jushelun*, T1558) — keep these five remarkably clean and anatomical, and the payoff of keeping them clean is that an entire map of the mind suddenly opens up: how it stains itself, how it cleanses itself, and where the gaps in our usual self-reporting lie.

Let me walk this map slowly.


1. What This Concept Is Talking About

A. Why "feeling" is here called a "root"

The *Abhidharma* treats every citta (心, moment of consciousness) as accompanied by *vedanā* (受) — feeling-toned awareness. But only when feeling steps into a leadership role — when it begins to *steer* the mind toward or away from its object — does it deserve the title of a (*indriya*, a dominant faculty with *增上* / "ascendancy" power). A moment of feeling that simply registers a sensation is vedanā as one of the fifty-one mental factors; the same feeling, when it pulls the mind forward ("I want more of this") or backward ("I must get away from this"), is functioning as a vedanendriya. The five names below are the five *types* of feeling-toned awareness that can wear this crown.

This is why the entry sits inside the twenty-two-root system rather than the five-aggregate system: 五受根 is about *power dynamics inside the mind*, while 受蕴 (vedanāskandha) is about *the raw fact that every conscious moment has a felt tone*. Different category, same family.

B. The exact five, by classical definition

The Kośa's foundational verse is compact:

身不悅名苦,即此悅名樂,及三定心悅,餘處此名喜,心不悅名憂,中捨二無別。 "Bodily displeasure is called *dukkha*; the same in the agreeable mode is *sukha*. In the third dhyāna, the mind's pleasure is [also] called *sukha*; everywhere else [in the lower three grounds], the mind's pleasure is called *saumanasya*. Mental displeasure is *domanassa*. The neutral, the same in body and mind, is *upekkhā*."

Translated into the actual classical anatomy:

- **苦根 (*dukkha-vedanendriya*) — bodily displeasure.** This is a *bodily* feeling (*身受*) — it accompanies the five sense-consciousnesses (eye, ear, nose, tongue, body). It is defined as 不悅 understood as 損惱 — disagreeable in the *damaging, intrusive* sense. The burn of a paper cut, the cramp of sitting wrong, the ache after a long run — these are dukkha. The phrase "bodily displeasure" is the literal reading; the English word "pain" can carry it, though we need to remember it covers any disagreeable bodily tone, including the subtle "I don't want to be here" the body whispers when no tissue damage is in sight.

- **樂根 (*sukha-vedanendriya*) — bodily pleasure.** The flip side: bodily agreeable feeling (*身受*), again with the five senses, defined as 悅 understood as 攝益 — agreeable in the *nourishing, integrating* sense. The first sip of warm tea, a hot shower on a cold morning, the relief of finally stretching after long sitting. This is not the abstract idea "I like this" — it is the body's tone of *yes*.

- **憂根 (*domanassa-vedanendriya*) — mental displeasure.** This is a *mental* feeling (*心受*), arising only with the *manas* / sixth consciousness (意識). It is the mind-tone of *unpleasantness-with-judgment*: "I don't like this, and I want it to stop, and I am bothered by it." The classical proof of its distinctness from dukkha is this: a person can lie in bed with no bodily pain at all and still be consumed by domanassa; conversely, a stoic may experience severe bodily dukkha while their mind remains equanimous. Body and mind, classically, do not automatically share their weather.

- **喜根 (*saumanasya-vedanendriya*) — mental joy.** A *mental* feeling (*心受*) that arises in the lower three grounds (欲界, 初禪, 二禪 — the desire realm, the first dhyāna, the second dhyāna). It is the mind's affirmative embrace: "I want this, I approve of this, this delights me." A friend's good news that lands right; a piece of music that genuinely moves you; the small inner "yes" of being treated fairly. Note: saumanasya is not yet the meditative bliss of *sukha* proper — it carries with it the kind of excited engagement that still has wanting in it.

- **捨根 (*upekkhā-vedanendriya*) — neutral feeling.** The remarkable one. *upekkhā* means "seeing evenly," and it spans both body and mind. Why is it one root where dukkha/sukha and domanassa/saumanasya are split? The Kośa's reason is precise: 「捨無分別任運而生」 — *upekkhā* arises *without discrimination, automatically, neither harming nor benefiting*. Because its face in the body and its face in the mind are qualitatively identical — both are the simple "so" of awareness — it earns a single root. The lukewarm mug on your desk; the steady rhythm of your breath at rest; the mindful gap between two thoughts — all of these are upekkhā. Not numbness; not indifference; just the neutral tone of awareness when nothing is being for or against.

A useful shorthand:

| Root | Domain | Felt tone | Example | |---|---|---|---| | 苦 dukkha | body (5 senses) | disagreeable / damaging | a paper cut | | 樂 sukha | body (5 senses) | agreeable / nourishing | warm shower | | 憂 domanassa | mind (6th) | mental displeasure | grief, resentment | | 喜 saumanasya | mind (6th), lower 3 grounds | mental joy | moved by good news | | 捨 upekkhā | body *and* mind | neutral | steady breath, gap between thoughts |

C. The third-dhyāna subtlety — even joy has a shape

The Kośa's most distinctive teaching is about what happens in the third dhyāna. There, the mind is profoundly satisfied, but it is not called *saumanasya* — it is called *sukha*. Why?

「第三靜慮心悅安靜,離喜貪故唯名樂根;下三地中心悅麁動有喜貪故,唯名喜根。」

The third dhyāna's mental satisfaction is *quiet*; it has shed the *joy-greed* (*喜貪*) that still tinges mental pleasure in the lower three grounds. In the first and second dhyānas, the mind's "yes" still has an undertone of "and I want more of this"; in the third, the wanting has been refined out, and what remains is a pure *摄益* — agreeable in the integrative sense — which is the same word used for bodily pleasure. So *sukha* is a *quality* (摄益), not a location (body vs. mind); wherever that quality is found, *sukha* is the right name. (Practically, in the third dhyāna there are no five-sense consciousnesses, so there is no bodily sukha — but the quality of sukha is present in the mind, so the term is borrowed.)

This matters beyond meditation. It is a teaching that even refined joy carries a covert motivational pull — a kind of thirst for itself. The contemporary phrase "addicted to positive thinking" is not unrelated to this diagnosis.

D. The double role: defilement's doorway and purification's support

The Kośa's terse formula is 「此成雜染由五受根」 — *defilement is constituted via the five feeling-roots.* When feeling becomes dominant and we follow its lead — pursuing *sukha* and *saumanasya*, fleeing *dukkha* and *domanassa*, drifting in *upekkhā*'s non-engagement — the fires of greed, hatred, and confusion are stoked.

But the same tradition insists the five are not only the problem. The *Vibhāṣā* masters, recorded in the Kośa, cite sūtras like 「樂故心定」「苦為信依」「出離依喜及憂、捨」 — *because of pleasure the mind is settled; pain is the basis of faith; equanimity together with joy and sorrow supports renunciation.* This is the forgotten half: dukkha-vedanā, properly held, can become the soil in which faith grows (the Tibetan tradition later formalized this in the "suffering first, then the urge to seek" structure of the four truths); sukha supports meditative one-pointedness; the appropriate admixture of joy and sorrow and equanimity supports the wish to leave the round. Feelings are not the enemy; unowned feelings are.

E. The domanassa-is-not-vipāka point

The Kośa makes a sharp ruling: **憂根 is not an *vipāka* (異熟) — it is not a karmic ripened result.** The argument: vipāka is non-discursive and cannot be stopped by discriminating understanding; domanassa *is* discriminative and *can* be stopped by such understanding. A person who has gone beyond the first stage of desire (已離欲者) has no domanassa; but if domanassa were vipāka, it would persist as a karmic ripener regardless of attainment. So your sorrows are not metaphysical debts arriving from past lives; they are mental productions *you are currently generating*. The liberating implication: they can be un-generated.

F. Ethical profile, cutting profile

The Kośa gives each root a moral-range fingerprint (*唯善後八根,憂通善不善,意餘受三種,前八唯無記*) and a cutting fingerprint (*意喜樂捨通見修所斷與非所斷三類;憂根唯見修所斷;苦根唯修所斷*).

The non-technical summary: most of the feeling-roots can be wholesome, unwholesome, or ethically neutral — joy, pleasure, equanimity, and the mind-faculty itself span all three. Domanassa is more dramatic: it can be wholesome (compassionate sorrow at another's misfortune) or unwholesome (resentment), but it has no neutral version — sorrow always engages judgment. Bodily *dukkha* is even narrower: it is never wholesome nor unwholesome — it is just a body fact — and it can only be cut by long *cultivation* (修所斷), not by a flash of insight. This matches the meditative experience: bodily pain sits deeper than mental pain in the stream of purification. The first sword of *darśana* (seeing, insight) cuts mental defilements including domanassa; the slower grind of *bhāvanā* (cultivation) is what finally erases bodily dukkha.

(For context, 見所斷 = cut at the path of seeing; 修所斷 = cut gradually along the path of cultivation; 非所斷 = the unconditioned / pure portion that does not need cutting. Saumanasya, sukha, upekkhā, and manas all have a *非所斷* portion — there is pure joy, pure pleasure, pure equanimity, pure mind in nirvāṇa. Domanassa has none — even wholesome sorrow is not part of the supreme state.)

G. The polemic: is *saumanasya* really a feeling?

A footnote worth knowing: outside the Sarvāstivāda orbit, some schools proposed that *saumanasya* is a separate mental factor — a special caitasika — rather than identical with joy-as-feeling. The Kośa argues against this by appealing to sūtras: 「漸無餘滅憂等五根,第三靜慮中無餘滅喜,於第四靜慮無餘滅樂」 and 「第四靜慮斷樂斷苦先喜憂沒」 — *in the third dhyāna, joy is gradually and completely extinguished; in the fourth, pleasure; in stages before that, sorrow and grief.* If saumanasya were a separate factor from joy-as-feeling, these extinction passages would not align so cleanly with the vedanā analysis. The Kośa's verdict: saumanasya *is* the joy-feeling. (For our purposes, the takeaway is that joy in the classical anatomy is a *type of feeling*, not a freestanding emotion labelled with a different name.)

H. Relation to the more famous teachings on *vedanā*

For readers who have met the word *vedanā* in other contexts:

- 受蕴 (vedanāskandha) is the broader category — every citta has a vedanā; this is the second of the five aggregates. - 五受根 (vedanendriya) is the more specific category — those same vedanās when they are functioning with *dominant* power over the mind. - 缘起 (pratītyasamutpāda) places *vedanā* as the 7th link: 触 → 受 → 爱 → 取 → 有 → 生 → 老死. *Feeling is the doorway between contact and craving.* This is precisely why the *Abhidharma* says "defilement is constituted via the five feeling-roots" — without a felt tone, there is nothing for craving to bite into. - 受念处 (vedanānupassanā) — the Satipaṭṭhāna contemplation of feelings — uses essentially the same fivefold scheme (sukha/dukkha/somanassa/domanassa/upekkhā) as its working template.

So the five vedanendriyas are not an Abhidharmic invention divorced from sūtra practice — they are the operational anatomy of the very feeling the practitioner of *vedanānupassanā* watches.


2. Walking Through a Day with the Five

Let us take a single ordinary day and stand at each doorway, mapping what is happening to which root.

6:47 a.m., the alarm. You are pulled out of sleep. The body's first signal is a clear 苦 (dukkha) — the warmth lost, the weight of the blanket no longer adequate, the slight stiffness of muscles at rest. As you sit up, the bed behind you gives a brief hint of bodily 樂 (sukha) — comfort remembered. The mind, scanning whether you have to get up, produces a small 憂 (domanassa) — the dread of the meeting you have to attend. A counter-current of 喜 (saumanasya) — anticipation of coffee, of the walk to work — runs alongside. The overall "should-I-stay-or-should-I-go" feeling, before either pole wins, is a kind of 捨 (upekkhā) — neutral, without strong for or against.

The classical anatomy lets you notice something you might otherwise miss: that *domanassa* and *dukkha* are *two different discomforts*. The body is saying "ugh, this position hurts," and the mind is saying "ugh, this day is going to be hard." They are not the same complaint, and they have different remedies — a stretch vs. a perspective shift.

7:20 a.m., the shower. Almost pure bodily 樂 (sukha). The hot water integrates. For a few minutes, *dukkha* from waking is replaced by *sukha* from warmth. The mind, freed from decisions, drifts in 捨 (upekkhā) — that pleasant neutral where nothing needs to be argued for or against.

8:03 a.m., the train. Now the body is being pressed by standing passengers — a steady low-grade 苦 (dukkha) in the legs and back. The mind, meanwhile, responds to the driver who brakes suddenly: 憂 (domanassa) — quick, judgmental, gone in a moment. Then a song you love comes through your headphones: 喜 (saumanasya) rises in the mind; *no bodily sukha needs to accompany it*, the pleasure is entirely mental. Looking blankly at the advertisements above the doors, neither for nor against — that's 捨 (upekkhā) in the mental register, the awake-neutral mode that fills most of the day for most people, and that we tend not to register because it isn't loud enough to report.

11:14 a.m., the meeting. A colleague presents your shared work and gets all the credit. Domanassa flares — mental displeasure with a strong "this should have been me" edge. Note how the body may join in: shoulders tighten (a somatic dukkha), but the *source* is the mind's judgment. If instead a friend had genuinely struggled and you felt for them, the same *domanassa* could be wholesome — *karuṇā*-adjacent sorrow — which is why the Kośa allows domanassa as either good or bad but never neutral.

2:30 p.m., the lunch. The first bite is bodily 樂 (sukha) — pure sensory pleasure. The fourth bite, if you are hungry, is less so; if you eat past satiation, the seventh bite can tip into bodily 苦 (dukkha). This is the moment the Kośa's logic becomes experiential: the body's agreeableness is *narrowly bounded*, with pleasure and displeasure living on either side of a moving threshold. The mind, however, may add 喜 (saumanasya) — "this is a good meal, this is good company" — or 憂 (domanassa) — "I shouldn't be eating this." Neither is required; you can eat in pure bodily *sukha* with a perfectly neutral *upekkhā* mind.

5:46 p.m., the scroll. Phone in hand. A friend's travel photo lands: a wave of mental 喜 (saumanasya) with no bodily component to speak of. A news headline about a distant disaster lands: a wave of 憂 (domanassa). Most items produce 捨 (upekkhā) — your eyes scan them, your mind neither resists nor embraces, and you scroll on. *Notice the ratio*: the meditative realism of the five-vedanā model tells you that a healthy inner life is not about being full of intense *sukha* and *saumanasya*; it is largely composed of well-regarded, awake-neutral *upekkhā* — the moment-to-moment "so" of being alive.

9:02 p.m., the argument. The mind leads with 憂 (domanassa) — judgment-laden displeasure at the other person. Often the body follows: chest tightness, throat constriction, a low-grade 苦 (dukkha) in the shoulders. If reconciliation arrives, 喜 (saumanasya) rises — sometimes a deep, almost palpable kind, the kind the lower-dhyāna meditators describe. The after-quiet, where you sit on the couch neither happy nor sad, is 捨 (upekkhā) in both body and mind — a single root, as the Kośa says, because the body's settled-down and the mind's settled-down feel qualitatively the same.

Common mappings the modern mind gets wrong:

- *Conflating bodily dukkha with mental domanassa.* "I feel terrible" usually names domanassa but is often *also* bodily dukkha, and these have different remedies. Stretching helps dukkha; perspective work helps domanassa. Conflating them hides two different problems in one word. - *Conflating bodily sukha with mental saumanasya.* A great massage gives bodily *sukha*; an inspiring film gives mental *saumanasya*. People say "I feel happy" — but they may have one, the other, or both. The classical split makes this explicit. - *Mistaking upekkhā for numbness.* True *upekkhā* is awake-neutral. Numbness is usually either suppressed *dukkha* / *domanassa* (a defense mechanism) or dissociated awareness. Real neutral feeling still has presence. - *Assuming feelings must be eliminated.* A beginner meditator often tries to "be calm" by refusing to feel. The classical position is different: in *vedanānupassanā* you *contemplate the feeling as it is*, including bodily *sukha*, bodily *dukkha*, *saumanasya*, *domanassa*, and *upekkhā*. They are not the obstacle; unowned feeling is. - *Sliding domanassa into "karmic punishment."* Because domanassa is *not vipāka*, your sorrows are not metaphysical debts. They are fabrications — and fabrications can be unwoven.


3. Why Contemporary People Need This Map

A. The body/mind axis that modern therapy fudges

Contemporary psychologies have many useful distinctions — affect vs. cognition, primary vs. secondary emotion, top-down vs. bottom-up regulation. But the body/mind axis that is *native* to the five vedanendriyas — and that runs through the Kośa's entire analysis — is rarely held so cleanly. The classical map says, in effect: the body's weather (dukkha/sukha/upekkhā) and the mind's weather (domanassa/saumanasya/upekkhā) are *different phenomena with different sources and different remedies*, even though they correlate. They are like two weather systems that can influence each other but are not the same. Holding this axis consciously helps with practical issues such as confusing physical pain with emotional distress (chronic pain patients in particular benefit from this distinction), and with over-interpreting mental distress as bodily malfunction or vice versa.

We should be honest about what contemporary neuroscience has and has not done here. Affective neuroscience does distinguish *interoception* (the sensing of internal bodily states) from *affect* in the narrow sense, and it shows richly that the two interact — emotion can change bodily tone (the clenched jaw of anger) and bodily state can trigger emotion (the James–Lange hypothesis in its modern forms). What it has *not* done is deliver a clean taxonomic map of the five types with the cross-classifying work the Kośa does. The neuroscience is genuinely informative on the *mechanisms* of body-mind interaction, but the fivefold scheme is a phenomenological classification built for liberation, not for mechanism-finding. Confusing the two is one of the most common errors in popular "Buddhism and the brain" writing; the five-vedanā system should be read as a careful phenomenological map, not as a proto-scientific theory.

B. The double role — defilement's doorway, purification's support

Modern therapeutic culture tends to swing between two simplifications: (1) "Feelings are good — feel them!" (the expressivist ideal), and (2) "Feelings are distortions — regulate them!" (the cognitive-behavioral ideal). The classical Abhidharmic position is more interesting: feelings are both the doorway of defilement and the support of purification, depending on whether they are owned or not. *Saumanasya* pursued becomes craving; *saumanasya* contemplated becomes the joy that sustains deep practice. *Dukkha* ignored becomes hardening; *dukkha* properly attended becomes the soil in which faith and urgency grow. *Upekkhā* lost in distraction becomes dullness; *upekkhā* deliberately cultivated becomes the spacious ground of meditation.

This is not just a metaphor for cognitive reappraisal. The Kośa commits to a structurally double role. A therapeutic culture that knows only one half of this — "lean into feelings" OR "transcend feelings" — is doing something simpler than the classical map.

C. Domanassa is not vipāka — which changes the moral weight of sorrow

Because *domanassa* is not a karmic ripener, your sorrows are not metaphysical debts arriving from past lives, nor are they the universe "giving you what you deserve." They are *presently being produced* by mental processes that can be presently trained. This is not a "you create your own suffering" blame-shift — it is a precision claim: the suffering of sorrow is of a kind that responds to training, unlike, say, terminal bodily illness, which is its own thing and which the Kośa also recognizes (the first noble truth is not reducible to "everything is in your head"). But for the vast interior terrain that most contemporary adults call "my depression," "my anxiety," "my resentment," the domanassa-is-not-vipāka ruling is genuinely liberating: those are not karmic punishments, they are generated patterns, and generated patterns can be un-generated.

D. The third-dhyāna lesson for the "positive-psychology" age

The third-dhyāna subtlety — that even refined joy can carry *喜貪*, a covert greed for its own continuation — speaks directly to a contemporary culture that has learned to monetize and instrumentalize positive feeling. The meditation-app industry, the affirmations genre, the relentless optimization of mood — all assume that more *saumanasya* is better, full stop. The Kośa disagrees. *Saumanasya* of the lower-three-grounds kind is good and useful, but it has a built-in appetitive edge that can itself become a fuel for the round. The third-dhyāna teaching is the recognition that *yes, you can refine pleasure further, even to the point where the wanting-for-the-pleasure has been refined out*. This is not asceticism; it is a more complete pleasure, in which the pleasure is no longer entangled with its own appetite. For modern practitioners, the takeaway is not "do not enjoy" but "notice whether your enjoyment contains a hunger that itself needs feeding."

E. The enormous territory of *upekkhā*

Most contemporary introspective vocabularies under-report *upekkhā* massively. We have rich language for the dramatic feelings — anxious, joyful, angry, blissful — but barely any for the neutral-feeling field that occupies most of our waking hours. The classical tradition gives this neutral field its own name, its own root, its own ethical profile (it can be wholesome, unwholesome, or neutral), and its own special status: *upekkhā* is the ground-state of the mind in deep meditation and in the *upekkā-sambojjhanga* (the awakening-factor of equanimity, a member of the seven bojjhaṅgas). For modern adults who feel overwhelmed by the noise of their own minds, the recognition that *most of mental life is upekkhā*, and that a well-cultivated *upekkhā* is the most spacious, awake, and free state available, is genuinely useful. *You are not "numb"; you are in the ground-state that has a name.*

F. The cutting-profile informs practice

Bodily *dukkha* is only *bhāvanā-heyya* (cut by cultivation), not *darśana-heyya* (cut by insight). This is why physical pain during long sits does not dissolve from understanding emptiness — it dissolves from training. Mental *domanassa* can be cut at *darśana* (the first flash of seeing the true nature of things); bodily pain cannot. Different remedies for different strata — the classical taxonomy here is, quietly, a manual for how to distribute one's contemplative effort.


4. Common Misreadings and How to Clean Them Up

1. "苦 means suffering in general." It does not. *Dukkha-vedanendriya* is the *bodily* disagreeable feeling-root. The general Buddhist *dukkha* of the first noble truth is far broader — it covers the unsatisfactory nature of conditioned existence as such. The five vedanendriyas are a specific analytical decomposition, not a translation of *dukkha*.

2. "樂 means happiness." Not in this system. *Sukha* is the *bodily* agreeable feeling-root. Happiness in the broad sense (which can include mental joy) maps onto multiple things, not just one. If you say "I'm happy" and mean "I'm physically comfortable," the right term is *sukha*. If you mean "I'm mentally glad," the right term is *saumanasya*. If you mean both, say both.

3. "憂 = sadness, 喜 = joy, just simple opposites." Almost, but not quite. *Domanassa* is mental displeasure *with discriminative engagement* — "I don't like this and I judge it." There are quietly sorrowful states that are not *domanassa* but a kind of muted *dukkha* in the body or quiet *upekkhā* in the mind. Conversely, *saumanasya* is mental joy *in the lower three grounds* — i.e., it can be refined away in deeper meditation and is not the deepest kind of happiness available.

4. "Feelings are bad; the goal is to feel nothing." This is the most consequential modern misreading, and it cuts against both the sūtras and the Abhidharma. The Kośa explicitly holds that all five are also supports of purification: pleasure settles the mind, pain grounds faith, joy and sorrow and equanimity together support renunciation. The contemplative task is not to annihilate feeling but to *see it as it is* (如受) without being driven by it — which is the *vedanānupassanā* of the Satipaṭṭhāna. The classical training is not feeling-suppression; it is feeling-ownership.

5. "Upekkhā = indifference or numbness." No. *Upekkhā* literally means *seeing evenly*; it is awake-neutral, not absent. The Latin-derived English word "equanimity" captures it better than "indifference." And the Kośa grants *upekkhā* a remarkable status: it spans body and mind because its quality is the same in both registers — which is, in the Kośa's terms, a sign that *upekkhā* is not a *failure* of feeling but a *peak* of it: the mode in which feeling no longer needs to take sides.

6. "Saumanasya is the same as the bliss of meditation." Not according to the Kośa. The third-dhyāna meditator is profoundly satisfied but *that satisfaction is not called saumanasya*; it is *sukha* (摄益) precisely because the joy-greed has been refined out. If your "meditation bliss" still has a quality of "I want this to continue" or "this is better than what was before," you are in the *saumanasya* register. If it has dropped even that appetite, you are in the *sukha* register of the third dhyāna or beyond. This distinction is diagnostic.

7. "Sorrow can be transcended by understanding." In part, yes — *domanassa* is *darśana-heyya*, cuttable at the path of seeing. But it is also true that *domanassa* has no *非所斷* portion: there is no unconditioned sorrow, no sorrow that belongs to nirvāṇa. Sorrow is *fully cut*, not preserved in some pure form. This is a very different trajectory from joy or pleasure or equanimity, which *do* have unconditioned versions that survive into awakening.

8. "The five vedanendriyas exhaust the range of feeling." They don't. The Kośa's analysis is a *dominant-faculty* analysis: it names the five types of vedanā that can take 增上 (ascendant) power. Vedanā as a mental factor is present in every citta, including moments not covered by these five in their dominant form. The five are the *headline* types, not the whole set.

9. "Domanassa is karmic punishment; better not have done that in a past life." No. The Kośa rules out that interpretation explicitly. *Domanassa* is not *vipāka* — it is discriminative and can be stopped by understanding. This does *not* mean past-life action is irrelevant; it means that your present sorrows are not unmediated retributions. They are fabrications, which means they respond to fabricatory work — practice, attention, perspective, training.

10. "The 5 vedanendriyas and the 受蕴 are the same thing." Different categories. The 受蕴 (vedanāskandha) is the aggregate of vedanā across all cittas; the 五受根 are the five types as they function with 增上 power. The aggregate is a container; the five indriyas are the kinds of items that, when they take the lead, do the steering of the mind.


5. A Final Map

If you remember nothing else, remember the three moves the five-vedanā map is making:

First: the body/mind axis is precise. Bodily *dukkha* and mental *domanassa* are not the same complaint; bodily *sukha* and mental *saumanasya* are not the same delight. *Upekkhā* is the only one that bridges them, and it bridges them because its quality — awake-neutral — is genuinely the same in both registers.

Second: the role of feeling is double. Feeling is the doorway of defilement (when followed) and the support of purification (when owned). A map that knows only one half is incomplete.

Third: the goal is not to abolish feeling but to see it accurately. The *Satipaṭṭhāna* contemplation of feelings is precisely this: not the elimination of *dukkha* / *domanassa* / *sukha* / *saumanasya* / *upekkhā*, but the capacity to know them as they are — *如受* — without the "I" story running behind them, deciding what they mean, who they belong to, and what must be done about them.

In a culture that has confused *feeling* with *emotion*, and *emotion* with *opinion*, the old anatomy is, paradoxically, fresh. Five clean distinctions. Five precise terms. A map of where the wheel of *saṃsāra* grips — and a map of where it can be let go.


*Notes on canonical sourcing:* The classical material in this essay is drawn from the *Abhidharmakośa* (*Apidamo Jushelun*, T1558) as the primary Abhidharma source on the five feeling-roots within the twenty-two indriya system. The well-known broader teachings on *vedanā* that contextualize this analysis — including the *Satipaṭṭhāna* "vedanānupassanā" contemplation (*如受*) and the place of *vedanā* as the seventh link of *pratītyasamutpāda* (触 → 受 → 爱) — are referenced where directly relevant. Contemporary neuroscience references (interoception, affective neuroscience, top-down/bottom-up emotion regulation) are used as *analogies for orientation*, not as proofs of the classical claims; the limits of such analogies are noted in §3A.

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一、定义与核心要义

「五受根」梵语 pañca vedanendriyāṇi,即苦、乐、忧、喜、舍五种感受之根。于《阿毘达磨俱舍论》所立二十二根体系中,五受根属感受性根,其核心定义见颂:「身不悦名苦,即此悦名乐,及三定心悦,余处此名喜,心不悦名忧,中舍二无别」,以不悦(损恼)为苦、悦(摄益)为乐。

二、主要阐述

《阿毘达磨俱舍论》为本条主要阐述论典,依其分类与论述要点分述如下:

(一)身受与心受之分类。五受分两大类:苦根与乐根属身受,与五识相应,以不悦为损恼义、悦为摄益义;忧根属心受,与意识相应,为能损恼之受;喜根亦属心受;舍根则通身受、心受二者。

(二)第三静虑心悦不名喜之理。论云:「第三静虑心悦安静,离喜贪故唯名乐根;下三地中心悦麁动有喜贪故,唯名喜根」。第三定中五识无故无身受,心悦即以摄益义之乐为名。

(三)舍根统摄身受心受之理由。论释谓「舍无分别任运而生」,在身、在心同无分别、非损非益,其相无异,故总立一根;苦、乐则因在身、心损益相异而别立。

(四)染净之增上力。五受根被定为「此成杂染由五受根」,即贪等随眠所随增故为染增上之处;而净资粮归于信等五根,清净究竟归于后三无漏根。毘婆沙师另引契经「乐故心定」「苦为信依」「出离依喜及忧、舍」,主张五受于净亦有增上用。

(五)忧根非异熟之判。论主明判忧根非异熟,理由是「忧分别差别所生,止息亦然;异熟不尔」,且已离欲者无忧根,异熟不如是。

(六)伦理性质。颂云:「唯善后八根,忧通善不善,意余受三种,前八唯无记」——意、喜、乐、舍通善、不善、无记三性;忧唯通善与不善;前八根(眼等五色根及男、女、命根)为无记。

(七)所断分类。意、喜、乐、舍通见修所断与非所断三类;忧根唯见修所断(非无漏故);苦根与七色根、命根唯修所断。

(八)成就极限。断善根者极少犹成就八根,即五受根及身、命、意三根。

三、不同部类与译本的表述差异

本条所引材料出自毘昙部《阿毘达磨俱舍论》(《阿毘達磨俱舍論》)。此论中亦涉与他部之争辩:关于「喜」之性质,有部以外之学派主张「喜」为别有心所、非即喜受。论主为破此说,引两项契经为证:「渐无余灭忧等五根,第三定中无余灭喜,于第四定无余灭乐」及「第四静虑断乐断苦先喜忧没」,据此证成喜即是喜受,且第三静虑中必无喜根。此一争辩正显示有部与其他部派于「喜」之实体认定上有所分歧,俱舍论主采取前者立场。

四、与相关概念的关系

(一)与二十二根之关系。五受根为二十二根之一组,与眼等五色根、男根、女根、命根、意根、信等五根、三无漏根并列同为体系中之二十二数。

(二)与三无漏根之关系。三无漏根(未知当知根、已知根、具知根)依意等九根而立,内摄五受根之无漏部分,为究竟清净所依。

(三)与烦恼、随烦恼相应之关系。烦恼与随烦恼之相应关系依五受而立论。

(四)与染净之关系。五受根既为杂染之所依,亦为毘婆沙师所说净法增上之所依,呈双重之关系。

五、代表性原文引用

1. 「身不悦名苦,即此悦名乐,及三定心悦,余处此名喜,心不悦名忧,中舍二无别」——五受核心定义颂。

2. 「第三静虑心悦安静,离喜贪故唯名乐根;下三地中心悦麁动有喜贪故,唯名喜根」。

3. 「舍无分别任运而生」——舍根统摄身受心受之理。

4. 「此成杂染由五受根」——五受为杂染依。

5. 「忧分别差别所生,止息亦然;异熟不尔」——忧非异熟之证。

6. 「唯善后八根,忧通善不善,意余受三种,前八唯无记」。

7. 「渐无余灭忧等五根,第三定中无余灭喜,于第四定无余灭乐」——证成喜即喜受之契经。

8. 「第四静虑断乐断苦先喜忧没」。

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阿毘達磨俱舍論T1558 · 毘曇部

《阿毘達磨俱舍論》以「樂等五受」或「五受根」統稱苦、樂、憂、喜、捨五根,將之置於二十二根體系中逐層辨析。

一、染淨增上之定位。論明五受根於染法為增上,以「貪等隨眠所隨增故」;信等八根於淨法為增上,以「諸清淨法隨生長故」。有餘師引契經「樂故心定」「苦為信依」「出離依喜及憂、捨」,謂五受於淨亦為增上,毘婆沙師傳說如此。總攝而言,「此成雜染由五受根,此淨資糧由信等五,此成清淨由後三根」,由此立根事皆究竟。

二、五根個別體性。頌云:「身不悅名苦,即此悅名樂,及三定心悅,餘處此名喜,心不悅名憂,中捨二無別」。論釋:苦根、樂根為「身受」,即五識相應受——不悅是損惱義,悅是攝益義;第三靜慮無五識,心相應受能攝益者亦名樂根。喜根為下三地(除第三定)心悅,以麁動有喜貪故唯名喜;第三靜慮心悅安靜、離喜貪故唯名樂。憂根為意識相應能損惱受。捨根即不苦不樂受,通於身受與心受二者。

三、捨根何以身心合一立一根。論設問「何因此二總立一根」,答曰:此受在身心「同無分別故」,任運而生,非損非益其相無異;苦樂在身在心損益相各異,故須別立,捨則不然,故總立一根。

四、善惡屬性。頌云「唯善後八根,憂通善不善,意餘受三種,前八唯無記」。論釋:意、喜、樂、捨一一通善、不善、無記三性;憂根唯通善與不善,非無漏故;七色根、命根、苦根唯無記。

五、所斷分別。意、喜、樂、捨通見所斷、修所斷、非所斷;憂根唯通見修所斷,非無漏;七色、命、苦唯修所斷,以不染污、非六生、皆有漏故。

六、受之得名與極少成就。論釋「受謂能受,能領納故」,或是受性故名為受。斷善根者極少猶成就八根,謂五受根及身、命、意,顯示五受根為有情最基本之領納機能。

七、與煩惱相應。論於辯諸煩惱隨煩惱時,明「如先所辯樂等五受根」,進而問「何煩惱等何根相應」,將五受根納入煩惱相應門中討論。

瑜伽師地論T1579 · 瑜伽部

《瑜伽師地論》論五受根,散見於受蘊差別、二十二根義門、禪定出離、聖果建立及識相應諸處,層面頗為豐富。

一、定義與所依。論中設問「五受根何義」,直答曰:「隨順苦、樂、憂、喜、捨處,即六根義。」 此謂五受根以眼、耳、鼻、舌、身、意六根為其所依,隨順五種領納處而轉。又論云「五色根何義?色等五各別境;第六根何義?一切法」,明五受根之生起須依六根各別取境。

二、三受與五受之開合。論中論受蘊自相,先立三受:「樂受、苦受、不苦不樂受」;復以五相安立諸受差別,自性仍歸三受,所依為六根,所緣為六境,助伴為想思等心法,隨轉則謂三受與相應心同生同滅。五受根於三受外別開憂、喜二者,論中明言「五根、三受,更互相攝」,即五攝三、三亦攝五,開合無礙。

三、禪定出離之次第。論以靜慮階位配五受根之出離:「初靜慮出離憂根,第二靜慮出離苦根,第三靜慮出離喜根,第四靜慮出離樂根,於無想界出離捨根。」 此為本論論五受根最具特色之側面,將五根逐一繫於四禪及無想界,示修定過程中感受根之漸次寂滅。

四、有漏無漏之判。論於二十二根中分別:「除最後二及苦、憂根,餘有漏、無漏」;又特別指出「苦根有漏、無漏,以有漏為義;憂根有漏,以有漏、無漏為義」。是知五受根中,苦、憂二根偏屬有漏,而樂、喜、捨三根通於有漏無漏。

五、聖果建立與練根。論云「預流、一來,於一切種皆圓滿故,建立憂根;若不還果,雖有初二,餘二無故,不立憂根,唯善法欲」。又設問依止喜根能捨喜、憂、捨三根,依出離憂根捨依耽嗜憂根,依一性捨捨依種種性捨,示五受根於修道轉依中有對治昇進之用。

六、識相應之欣慼。論以受相應識分三類:「苦受相應識名慼,此能了別隨順憂苦不可意法;樂受相應識名欣,此能了別隨順喜樂可意諸法;不苦不樂受相應識名非欣非慼」。此處以「欣」「慼」為憂喜之異名,將五受根收攝於識之了別作用。

七、執受變異與受之生起。論說有執受色由四因緣變異:外色逼觸則「生苦、生悲、生惱」,饒益則「生樂、安隱、饒益」;內界相違則生苦惱,平等則安樂;煩惱纏現行則「生苦、憤發、熾然」;正審慮所緣則「起輕安喜樂攝受」。此從色法執受角度說明五受根生起之因緣條件。

八、受蘊觀察之八問。論引如來於諸受起八種觀:受有幾種、誰為受集、誰是受滅、集趣行、滅趣行、愛味、過患、出離,為五受根之觀行框架。又論共相云「樂受,壞苦故苦;苦受,苦苦故苦;不苦不樂受,行苦故苦」,結歸「諸所有受皆說名苦」。

術語方面,本論一律用「五受根」「苦根」「樂根」「憂根」「喜根」「捨根」之名,受蘊稱「受蘊」而非「受陰」,三受稱「樂受、苦受、不苦不樂受」,禪定稱「靜慮」而非「禪」或「三摩地」,無想界出離捨根之「無想界」亦為本論特有表述。

成唯識論T1585 · 瑜伽部

《成唯識論》論述「五受根」(苦、樂、憂、喜、捨五根),主要從自性、分五之理、與五識意識的對應、純苦處特例、煩惱相應及修道位次等方面展開。

一、五受根自性:論列五受根為二十二根之一,明確指出「五受根如應,各自受為性」,即五根各以與其相應之受為體性。

二、三受分五之理:總立三受(苦、樂、捨),可再分為五。苦、樂各分為二者有三因:逼、悅之相有身、心之異;有分別與無分別之別;輕微與尤重程度有差。不苦不樂(捨)不分二者,則因非逼非悅、相無差別、無分別、平等而轉。

三、樂之區分:五識相應的適悅受,恒名為樂。意識相應的適悅受,在欲界及初二靜慮近分唯悅心故名喜;初二靜慮根本悅身心故名樂名喜;第三靜慮近分、根本安靜尤重、無分別故,皆名為樂。

四、苦之區分:五識相應的逼迫受恒名為苦。意識相應的逼迫受,有義唯憂(據《瑜伽》等說意地慼受名憂根),有義則視處所而定:人天中輕者恒名為憂;傍生、鬼界雜受、純受有輕重,故名憂名苦;那落迦純受尤重、無分別故,唯名為苦。論中以多重論據成立「極苦處意迫名苦,無有憂根」之義,認為《瑜伽》說地獄苦憂相續乃隨轉門,實則純受苦處意地的慼受亦攝於苦根。

五、五受與煩惱相應:有義主張欲、瞋、癡等皆可與五受相應,並以「貪愛憂苦相應」「審決等四苦俱何咎」等理成立此說,兼通五識相應之微細印境等四。

六、修道位次中的憂根:論於辨未知當知根體位時,列出根本、加行、資糧三位,以信等五根及意、喜、樂、捨為根性;然「加行等位於後勝法求證愁慼亦有憂根,非正善根,故多不說」。未離欲者於上解脫求證愁慼亦有憂根,義亦同此。

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