Dharma · AI Companion

常身

nitya-kāya

如来常住不坏的真实身。AI-generated

Type AttainmentDifficulty AdvancedTruth-level span III · nominal designation ⇢ IV · beyond wordsInitial AI estimate · evolves with use

如来藏系于性空之后正面重立常住真身,属名言重立(第三重);天台圆教读常身即离言实相(第四重)。

A Contemporary ReadingAI-generated

What this concept is about

Let us begin from a very ordinary experience.

When we see a person born, grow up, fall ill, age, and pass away, we naturally conclude: "This person's body is this person; when the body breaks down, this person is gone." If we apply the same way of observing directly to the Buddha, a difficulty arises: since the Buddha likewise is said to have manifested birth, cultivation, illness, and final extinction, is he then merely a person who appeared briefly in history and subsequently vanished?

The "permanent body" (常身, nitya-kāya, the "permanent body") is spoken precisely to answer this question.

In one sentence: the permanent body is the Buddha's true body, which transcends arising and ceasing, change and alteration, and cannot be destroyed; and yet the Buddha, precisely because he transcends arising and ceasing, does not distance himself from sentient beings—on the contrary, he can, in accord with conditions, manifest birth, illness, teaching, and even nirvāṇa.

However, this sentence must be unpacked. The permanent body comprises at least two inseparable aspects that cannot be conflated into one:

First, the Buddha's true body is not governed by arising and ceasing.

The *Mahāparinirvāṇa Sūtra* (《大般涅槃經》) says:

"如来身者,是常住身、不可坏身、金刚之身、非杂食身,即是法身。"

*"The Tathāgata's body is the permanent body, the indestructible body, the vajra body, the body not sustained by mixed food—that is, the dharma body."*

Here several names illuminate one another:

- "Permanent body" (常住身): it does not change with the flow of arising and ceasing; - "Indestructible body" and "vajra body": it is not an existence temporarily pieced together from fragile conditions that will eventually decay; - "Body not sustained by mixed food": it is unlike the flesh-and-blood body of ordinary beings, which is nourished by food and drink and maintained by conditions; - "That is, the dharma body": the emphasis falls on the Tathāgata's true nature, not on a material body extended indefinitely in time.

Thus, "permanent" does not mean "has existed for a very long time," nor does it mean imagining the Buddha as a colossal divine being who never ages and stands forever somewhere in the cosmos. To live a hundred years, ten thousand years, or even an unimaginably long time is still continuation within time; as long as it occurs through conditions and changes with conditions, it remains conditioned (有為法, saṃskṛta-dharma, conditioned phenomena) and impermanent. The "permanence" of the permanent body refers to the fact that the Tathāgata's dharma body fundamentally does not belong to this mode of existence that proceeds from birth toward destruction.

The classical sources further explain this from two sides: dharma-nature and buddha-nature.

Regarding dharma-nature (法性, dharmatā, dharma-nature): the *Mahāparinirvāṇa Sūtra* links nirvāṇa with "the dharma-nature of all buddhas" (諸佛之法性) and immediately stresses: "夫法性者,无有灭也。" ("As for dharma-nature, it has no extinction.") This sentence blocks a common misunderstanding: the Buddha's entry into nirvāṇa is not a case of a previously existing Buddha being annihilated into nothingness at some moment. Nor is nirvāṇa some hidden location in the cosmos to which the Buddha moves after relinquishing his body. To understand nirvāṇa as utter annihilation is still to imagine the dharma body within the framework of things arising, enduring, and disappearing.

Regarding buddha-nature (佛性, buddha-dhātu, buddha-nature): the sūtra says that buddha-nature is "without arising, without ceasing, without going, without coming" (無生、無滅、無去、無來), does not belong to the three times, and is not a thing produced by causes and conditions, and is therefore called permanent. It further says:

"佛性即是如来,如来即是法,法即是常。"

*"Buddha-nature is the Tathāgata; the Tathāgata is the dharma; the dharma is the permanent."*

This is not a claim that buddha-nature is an eternal soul hidden inside the body. Soul views typically still presuppose an entity that can exist independently, go from here to there, and migrate from this life to the next; the sūtra deliberately uses "without going, without coming," non-spatiality, and non-production by causes and conditions to describe buddha-nature and the dharma body. It is not another, more hidden and more solid thing within the empirical world.

Second, true permanence and skillful manifestation must be understood together.

If one speaks only of "neither arising nor ceasing," it is easy to imagine the permanent body as a motionless, abstract essence with no relation to sentient beings; but the sources repeatedly state that the Tathāgata can manifest various bodily forms for the sake of liberating beings.

The *Mahāparinirvāṇa Sūtra* distinguishes the truly permanent body from the "transformation body" (變化身, nirmāṇa-kāya, transformation body). The birth, growth, eating and drinking, illness, relinquishing of the body, and nirvāṇa that sentient beings see can be manifestations arising in accord with conditions for the purpose of teaching—they do not mean that the dharma body itself undergoes a change from existence to non-existence. The sūtra uses two sets of similes:

- Like a venomous snake shedding its old skin: abandoning a manifested body does not mean the true Tathāgata is annihilated; - Like genuine gold being freely fashioned into various vessels: the vessel's shape can be changed, but the gold does not thereby lose its gold-nature.

The sūtra further says that the Tathāgata can manifest various bodily forms within the "twenty-five realms of existence" (二十五有), appearing to be born, to grow, to enter nirvāṇa, and so on, while the true Tathāgata body remains "permanent, without change or alteration." The key here is not to deny that people genuinely see the Buddha's physical body and his passing into nirvāṇa, but to distinguish "the manifested appearance" from "the Tathāgata's true nature."

The emphasis of the *Mahāprajñāpāramitā Śāstra* (《大智度論》, *Treatise on the Great Perfection of Wisdom*) is somewhat different. It does not, in the relevant passages, build up theoretical definitions of the dharma body, dharma-nature, and buddha-nature point by point; rather, it focuses on describing "showing" (示):

"尔时,世尊以常身示此三千大千世界一切众生。"

*"At that time, the World-Honored One, with his permanent body, showed himself to all sentient beings in this trichiliocosm."*

This passage immediately follows the Buddha's skillful manifestation of illness. The Buddha manifested a minor ailment so that, in later ages, ill monks could properly request medicine from laypeople, and after their bodies were at ease, continue sitting in meditation and practicing the path. The treatise therefore judges: "佛为方便,非实病也。" ("The Buddha's illness was skillful means, not a real illness.") Subsequently, the Buddha, about to teach the Mahāprajñāpāramitā (摩訶般若波羅蜜, the great perfection of wisdom), entered the samādhirāja-samādhi (三昧王三昧, king of samādhis); light rose from the wheel-mark on the soles of his feet, ascending in sequence to the uṣṇīṣa (cranial protuberance), becoming a vast radiance that illuminated the trichiliocosm and even the buddha-worlds of the ten directions; devas, humans, and non-humans gathered to make offerings.

Therefore, the emphases of the two sources cannot be forcibly compressed into a single identical statement:

- The *Mahāparinirvāṇa Sūtra* explains primarily from the side of essence that the permanent body is the Tathāgata's dharma body—permanent, indestructible, neither arising nor ceasing—and distinguishes the true body from the transformation body manifested as skillful means; - The *Mahāprajñāpāramitā Śāstra* passage focuses on the Buddha "showing" the permanent body to all sentient beings, and on the relationship between this manifestation and entering samādhi, emitting light, and the Prajñāpāramitā teaching assembly.

Taken together, the permanent body is neither a transcendence that "never appears at all," nor the claim that "all appearances are themselves eternally unchanging." It explains that the Tathāgata's true nature does not fall into arising and ceasing, and that the Buddha, unconstrained by any single form, can make various manifestations in accordance with the conditions of sentient beings.

This also explains why the sūtra says the permanent body cannot be pointed out by the directions east, west, south, or north. When ordinary people say "body," they invariably think of an object occupying space: it is here, not there; it comes from here, goes toward there. But the *Mahāparinirvāṇa Sūtra* uses fire as a simile: fire burns depending on conditions, and when the conditions are exhausted it ceases; one cannot ask whether, after ceasing, it went east or west. This simile first dismantles the attachment that "what arises and ceases must have an entity that comes and goes." The permanent body can neither be understood as a physical body arising and ceasing through causes and conditions, nor be placed in some corner of space.

For this very reason, the sūtra's statement "如來常住,則名為我" ("the Tathāgata is permanent—this is then called self") cannot be smuggled into the ordinary self grasped by ordinary beings as permanent, unitary, independent, and all-controlling. This "self" is linked to "the Tathāgata's dharma body, boundless and unobstructed, neither arising nor ceasing, attaining the eightfold mastery" (八自在, aṣṭa-vaśitā, the eightfold mastery); it is the *Mahāparinirvāṇa Sūtra*'s language for describing the Tathāgata's dharma body in a specific context, not an endorsement of the everyday sense of self or of the eternal-self views of non-Buddhists.

The place of the permanent body on the path of liberation becomes visible here: it does not satisfy the human longing for immortality, but prevents practice from falling into two extremes.

One extreme is attachment to permanence: imagining the Buddha, buddha-nature, or nirvāṇa as an eternally unchanging substantial self.

The other extreme is annihilationism: thinking that since the five aggregates (五陰, pañcaskandha, the five aggregates) are impermanent and the Buddha also manifested entry into nirvāṇa, the final result of practice is to become utterly nothing.

The teaching of the permanent body passes between these two extremes: the psychophysical phenomena produced by causes and conditions are indeed impermanent and cannot be grasped as self; but nirvāṇa cannot therefore be misunderstood as annihilation, nor can the Tathāgata's dharma body be treated as a blank left behind after some conditioned composite finally breaks down. It makes one understand that liberation is not repairing an impermanent self into a permanent self, but transcending the very framework that measures reality by "I was born, I endure, I cease."

A walkthrough in daily life

Suppose you take the subway to work one morning. You slept poorly the night before; your body is tired. Phone notifications keep piling up. Your supervisor sends a message with an ambiguous tone: "Come by the office when you get in." You immediately tense up.

Step one: first look at the "body sustained by mixed food" (雜食身) in ordinary experience.

This body of yours is maintained by conditions: food, sleep, air, temperature, medical care. Without breakfast, blood sugar may shift; with a few hours less sleep, attention and mood are easily disturbed; when the carriage is stuffy, the body grows restless. This is precisely the body that is produced by causes and conditions (因緣, hetu-pratyaya, causes and conditions), requires nourishment, and is subject to fatigue and damage.

The easiest mis-mapping here is: because the *Mahāparinirvāṇa Sūtra* says the permanent body is "not sustained by mixed food," one might disparage one's own physical body, or think that practitioners should not eat, sleep, or seek treatment. The permanent body means that the Buddha's dharma body is not equivalent to the ordinary body sustained by mixed food; it does not cancel the conditionality of the ordinary body. Precisely because the body stands dependent on conditions, practitioners should care for it realistically, rather than mistreat it with metaphysical notions.

Step two: see how "the manifested appearance" (所現之相) can be mistaken for the whole of reality.

You see the supervisor's message, and your mind immediately produces a host of scenarios: is something wrong with my work? Are they going to lay people off? Are they dissatisfied with me? Within minutes, these conjectures feel like facts. You are no longer merely facing a message; you are facing an entire future you have manufactured.

Here, the teaching of the permanent body does not tell you to say to yourself: "All of this is the Buddha's transformation body, so I don't need to attend to it." Your present anxiety, speculation, and bodily reactions belong to the conditioned, continuous psychophysical process of an ordinary being; they cannot be passed off as the Buddha's skillful manifestation. The transformation body spoken of in the scriptures is the Buddha's body manifested to liberate sentient beings; not every psychological fluctuation can casually be called a "transformation body."

What is genuinely relevant as a reminder is this: do not take a single appearance before you as the whole of reality. The Buddha manifested illness without his dharma body actually having any defect—this shows that "the seen appearance" and "the true nature" cannot be rashly equated. By analogy in daily life, we can at least learn: a supervisor's sentence is a phenomenon that has appeared, but your interpretation of it is not yet a fact; a partner's momentary silence is a phenomenon, but it need not immediately equal "they don't love me anymore"; a child's single failed exam is a phenomenon, and it certainly does not equal "this child has no future."

This is only an analogy at the level of cognition; it is not to say that ordinary people's silence, anxiety, or mistakes share the same nature as the Buddha's skillful manifestation.

Step three: look at the boundary between "illness" and "skillful means."

In the afternoon you actually develop a fever. If one misreads the *Mahāprajñāpāramitā Śāstra*'s "佛為方便,非實病也" ("the Buddha's illness was skillful means, not a real illness"), one might think: "The body is fundamentally empty; illness is also a manifestation; I don't need to see a doctor." This is arbitrarily imposing the Buddha's state upon an ordinary person.

The treatise's point is that the Buddha has already transcended unwholesome dharmas, and the minor illness he manifested had a specific pedagogical purpose; it does not say that all people's illnesses are unreal, nor does it negate medicine. On the contrary, the skillful means in that story exists precisely so that ill monks in later ages could legitimately seek medicine and practice the path peacefully. Applied to contemporary life, the correct walkthrough is: my body is a body dependent on conditions; when ill, I should assess the condition, rest, and seek medical care. Caring for the body is a way of reducing obstacles and continuing life and practice; refusing treatment is not the same as relinquishing attachment to the body.

Step four: look at "coming and going" in intimate relationships.

In the evening, a partner leaves the room after an argument. A strong unease rises in you: "They've left; our relationship is over; if the relationship ends, I will have lost my complete self." Our minds are deeply habituated to organizing existence through space and events: a person being here means possession; a person going there means loss; a relationship appearing means I am affirmed; a relationship ending means I am destroyed.

The teaching that the permanent body cannot be pointed out by east, west, south, or north is, first of all, about the Tathāgata's body; it cannot be directly turned into a therapeutic technique for ordinary emotions. But it can illuminate a deeply rooted cognitive habit of ours: imagining everything as a fixed entity that comes, abides, goes, and ceases. If we do not see this habit, we may even imagine liberation as "moving from the painful world to an eternal world," and nirvāṇa as a safe location where nothing is ever lost.

In the scene of a relationship, one can first do a simple thing: acknowledge that the argument is occurring, that the loss is occurring, but do not rush to freeze a present event into "who I am," "who the other person is," "what the future will be forever." This is not claiming to have already realized the permanent body; it is letting the mind produce fewer absolute judgments manufactured from arising-and-ceasing appearances.

Step five: see that "manifesting in accord with conditions" does not mean having no principles.

At work you are a manager; at home you are a partner, a parent, or a child of your parents; facing different people, you use different tones and bear different responsibilities. Someone might therefore interpret the permanent body as: "Everything is just a role anyway; I can play it however I like."

But the Buddha's transformational manifestations are directed toward liberating sentient beings; they are not a way of evading responsibility, still less opportunistic self-packaging. The simile of genuine gold being fashioned into different vessels has its point in the Tathāgata's free manifestation while the true nature remains unchanged; if used as a life analogy, it can only remind us in a limited way: maturity does not require mechanically maintaining the same expression and speech in every situation. Gently soothing a child, clearly pointing out a colleague's problem, patiently accompanying a patient—these can be different modes of response; the standard for evaluating them is whether they reduce harm and increase clarity, not whether they preserve a fixed persona of "I have always been like this."

AI can also provide a limited point of contrast: the same model generates different expressions in response to different prompts, and algorithmic platforms present different content to different users. This can help contemporary people intuitively understand that "the mode of presentation changes with conditions." But the analogy stops there. AI output depends on training data, computational resources, and system conditions—it belongs entirely to conditioned fabrication (有為造作); it can neither attest to the dharma body nor be equated with the Buddha's free manifestation. Whether artificial systems possess consciousness remains a matter of extensive debate in contemporary science and philosophy, and it certainly cannot be used to draw metaphysical conclusions on behalf of the scriptures.

This entire walkthrough ultimately requires distinguishing three things:

- The ordinary body-mind is produced by causes and conditions; it should be observed and cared for realistically, and cannot be passed off as the permanent body; - The Buddha's manifested birth, illness, teaching, and nirvāṇa are skillful means for liberating beings; one cannot infer from them that the dharma body arises and ceases; - Daily life can use the teaching of the permanent body to reflect on our habits of clinging to appearances, to entities, and to coming-and-going; but life analogies are not realization, nor are they the scriptural definitions themselves.

Why contemporary people need it

A deep anxiety of contemporary people is that everything is being renewed, depreciated, and disappearing.

The body ages, professional identities expire, platform popularity declines, relationships change, and digital materials saved over many years may be lost through devices, accounts, or formats. People therefore easily move toward two forms of compensation: either frantically producing something "that will never change," or simply concluding that "everything will disappear, so nothing has meaning."

To the first impulse, the permanent body says: do not process things produced by causes and conditions into eternal idols.

Longevity is not the permanent body; staying continuously online is not the permanent body; being remembered by posterity is not the permanent body. Even if a person's image is preserved forever by algorithms and a digital likeness can be generated endlessly, it still depends on servers, electricity, corporate policies, data formats, and viewers; when conditions change, the presentation changes. It only extends or copies conditioned phenomena; it does not transcend them.

To the second kind of nihilistic feeling, the permanent body says: impermanence is not nothingness, and nirvāṇa is not "nothing at all."

Buddhism points out that dharmas arising from conditions are impermanent in order to loosen grasping, not to pronounce that existence is worthless. Precisely because every condition affects the outcome, a kind response, an honest cutting of losses, a patient act of care truly matter. If everything were fixed and unchanging, practice would have no entry point; precisely because greed, hatred, and delusion (貪瞋癡, rāga-dveṣa-moha, greed, hatred, delusion) arise through conditions, moral discipline, concentration, and wisdom (戒定慧, śīla-samādhi-prajñā, moral discipline, concentration, and wisdom) can change their conditions.

But liberation is not merely making conditions more comfortable. Better sleep, more stable work, and healthier relationships are all worth cherishing, yet they will still change. The path of liberation continues to ask: when these conditions change, why do we immediately feel "I have been destroyed"? Who is it that seizes every arising-and-ceasing experience into "I" and "mine"? What the permanent body safeguards at the far end of the path is a correct understanding of buddhahood and nirvāṇa: practice is not the business of maintaining a self-project of perpetual existence, but the thorough transcendence of the way of establishing a self through arising-and-ceasing dharmas.

It also means that "the Buddha entered nirvāṇa" no longer equals "the Buddha's teaching has lost its source." If the Buddha were only a historical physical body, then after that body's extinction the Buddha would be merely a memorable past event. The *Mahāparinirvāṇa Sūtra*'s emphasis that "the Buddha is permanent" is precisely what shifts the ground of refuge from dependence on a body that will decay to the Tathāgata's dharma body, dharma-nature, and buddha-nature. This does not deny the historical Buddha's manifestation; it says that the Buddha's true meaning cannot be exhausted by the appearance and disappearance of a historical physical body.

Therefore, the permanent body also transforms a practitioner's imagination of "seeing the Buddha." If one insists that the Buddha must stand before one's eyes in some fixed physical appearance, one still confines the Tathāgata to a spatial object; if one thinks the Buddha is invisible, unlocatable, and therefore unrelated to human life, one falls into abstraction. The *Mahāprajñāpāramitā Śāstra*'s depiction of the World-Honored One universally showing the permanent body to sentient beings demonstrates that transcending arising and ceasing does not mean refusing to appear. Wisdom is not purified by leaving sentient beings behind, nor does skillful means occur by departing from reality; the Buddha's manifestation and teaching are precisely the opening of liberation in a way that sentient beings can bear.

From the standpoint of practical sequence, understanding the permanent body brings at least threefold correction:

First, honestly acknowledge the impermanence of the ordinary five aggregates, the sense bases and elements (陰入界), and all conditioned dharmas, without calling one's own body, emotions, views, or identity the permanent body.

Second, through the contemplation of impermanence, loosen the two opposing yet interdependent attachments: "I will exist forever" and "I will be utterly annihilated."

Third, in the context of the Mahāyāna fruition of buddhahood and nirvāṇa, understand that the Tathāgata's dharma body is neither conditioned nor annihilated, while still being able to benefit sentient beings through skillful means.

Without the first layer, the "permanent body" easily becomes a mystical doctrine of immortality; without the second, it is merely doctrinal knowledge that never touches a person's fundamental fears; without the third, the contemplation of impermanence can be misread as a cold philosophy of extinction. Only when the three layers are connected does the permanent body actually stand within the path of liberation, rather than floating on the surface of names and concepts.

Common misinterpretations and clarifications

First, "The permanent body means the Buddha forever possesses a physical body that never ages."

No. The *Mahāparinirvāṇa Sūtra* explicitly describes it as "not sustained by mixed food—that is, the dharma body." It is not a material body maintained by food and drink, occupying a fixed location, and extended indefinitely in time. Understanding "permanent" as "an especially long time" still has not left the framework of conditioned phenomena.

Second, "Since the permanent body is the dharma body, the Buddha's historical physical body and his entry into nirvāṇa are both fake."

Not accurate either. "Manifestation" (示現) is not a meaningless deception. The Buddha was born, cultivated, taught, manifested illness, and entered nirvāṇa in bodily forms that sentient beings could encounter; these have genuine function within the conditions of teaching. What is to be negated is the inference, drawn from these appearances, that the Tathāgata's dharma body likewise arises and ceases. The transformation body is not the opposite of the dharma body; it is skillful means for liberating beings. But the two cannot be conflated without distinction into the same level.

Third, "The permanent body means Buddhism affirms an eternal soul."

No. The sūtra explains "permanent" through buddha-nature being without arising, without ceasing, without going, without coming, not belonging to the three times, and not produced by causes and conditions—it does not establish an individual soul that exits the body and migrates elsewhere. Although the *Mahāparinirvāṇa Sūtra* says "the Tathāgata is permanent, this is then called self," this "self" is spoken in the specific context of the Tathāgata's dharma body being boundless, unobstructed, neither arising nor ceasing, and attaining mastery; it cannot be transplanted into the claim that there is a permanent sovereign within the ordinary five aggregates.

Fourth, "Since buddha-nature is permanent, my current personality, desires, and self-narrative are the permanent body."

No. A person's personality changes with experience; desires arise depending on objects and habits; self-narratives are shaped by memory, relationships, and social environment. These are all observable conditional processes. The permanence of buddha-nature spoken of in the scriptures cannot be reduced to "the true me has always been like this," and still less can it be used to stamp approval on habitual tendencies.

Fifth, "Since the Tathāgata can manifest illness, an ordinary person's illness is also only a manifestation, so no treatment is needed."

This is a dangerous misapplication. The relevant passage in the *Mahāprajñāpāramitā Śāstra* refers specifically to the Buddha's skillful manifestation of illness, and its pedagogical effect includes enabling ill monks in later ages to seek medicine and practice the path peacefully. The illness of an ordinary being's condition-dependent body should be cared for realistically and treated when necessary. Claiming that one's own pain is merely a manifestation is often not transcending attachment to the body but denying reality.

Sixth, "Since the permanent body can manifest in accord with conditions, any miraculous sight can be said to be the Buddha appearing."

No such inference is possible. The *Mahāprajñāpāramitā Śāstra* does describe the Buddha entering samādhi, emitting light, universally showing the permanent body, and the assembly gathering to make offerings—but dreams, visual anomalies, online images, or personal intuitions cannot therefore be automatically certified as a scriptural Buddha-body manifestation. The doctrinal function of scriptural narrative and the judgment of truth or falsity in personal experience are two different matters. Toward anomalous experiences, one need be neither dismissive nor hastily sanctifying.

Seventh, "The permanent body is omnipresent, so it is equivalent to some kind of cosmic energy."

"Energy" has a specific, measurable physical meaning in modern science. The dharma body is not a physical object, and there is no scriptural basis for equating it with an energy field. Even using "omnipresence" as an aid to imagination requires caution; declaring outright that science has discovered the dharma body confuses the boundaries between contemplative language, religious doctrine, and empirical science. Science can study religious experience, cognition, and bodily responses, but it cannot by those studies alone prove or disprove the metaphysical significance of the dharma body.

Eighth, "Since the dharma body neither arises nor ceases, conditioned dharmas are not worth attending to."

Quite the opposite. The Buddha's skillful manifestations occur precisely within the concrete situations of sentient beings: illness requires medicine, confusion requires teaching, and different faculties require different approaches. The permanence of the dharma body is not an excuse to flee the world of conditions; it explains that the Buddha is not restricted by any single arising-and-ceasing form and therefore can benefit beings in accordance with conditions. For practitioners, appreciating this should make one more willing to care for concrete suffering, not more indifferent.

Ninth, "The permanent body means that, apart from the Tathāgata, many worldly things are also absolutely permanent."

The *Mahāparinirvāṇa Sūtra* restricts this severely: "此常法称要是如来,非是余法。" ("This dharma called permanent is precisely the Tathāgata, not any other dharma.") The sūtra also excludes Brahmā (梵天), Īśvara (自在天), the self grasped by the world, primordial matter (性), atoms (微塵), and other non-Buddhist or worldly notions of permanence. One cannot, because something is extremely long-lasting, extremely subtle, or temporarily shows no change, include it in this "permanent dharma."

Tenth, "The Buddha extinguishes the impermanent form, feeling, perception, volition, and consciousness to obtain the permanent body—this means practice requires loathing and destroying one's own body and mind."

This cannot be narrowed in that way. The sūtra explains, in the context of the Tathāgata's permanent body, that it transcends the impermanent five aggregates; it is not encouraging ordinary beings to violently suppress feelings, memories, volitional formations, or consciousness. For practitioners, the entry point remains the realistic observation of the body-mind's conditions, not grasping the five aggregates as permanent, blissful, self, or pure. If one attempts to destroy body and mind out of self-disgust, that is still "I" in control, and has not transcended attachment to self.

Finally, the essential meaning of the permanent body can be gathered into one sentence: it is not upgrading a perishable "I" into an imperishable "I," but revealing that the Tathāgata's true nature does not fall into arising-and-ceasing, permanence, or annihilation, while never abandoning sentient beings—able to manifest in accord with conditions, teach the dharma, and liberate beings within the world of arising and ceasing.

Thus, one who truly understands the permanent body does not cling more tightly to some eternal image, but becomes clearer in distinguishing the real from the manifested, the dharma body from the physical body, impermanence from annihilation; nor does one flee reality in the name of transcendence, but learns wisdom and skillful means within each concrete set of conditions. The "permanence" of the permanent body is not a rigid refusal of change; the "manifestation" of the permanent body is not the falsity of arbitrary role-playing. The former keeps the fruit of buddhahood from falling into annihilation; the latter keeps the dharma from being separated from sentient beings. Only when both stand together does this concept carry its full weight on the path of liberation.

Canonical EntryAI-generated

一、定义与核心要义

「常身」(nitya-kāya)指佛不受生灭、变易与毁坏支配之身。《大般涅槃經》从如来真实体性立说,称「如來身者,是常住身、不可壞身、金剛之身、非雜食身,即是法身」,并以不生不灭、非有为、毕竟清净说明其「常」;这不是凡夫色身在时间中的长久延续,而是如来法身不属因缘生灭。《大智度論》则着重佛的示现,记世尊「以常身示此三千大千世界一切眾生」,突出常身在般若说法因缘中向众生普遍显现的一面。

二、主要阐述

《大般涅槃經》首先区别真实常住之身与随缘示现之身。如来于一切法得自在,能随意住寿;众生现前所见,是为度生而现的「變化身」,并非真实的「雜食身」。如来示现舍身入涅槃,如毒蛇舍故皮;又如真金可随意制成诸器,能在「二十五有」中示现出生、长大与涅槃等相,而真实如来身仍「常住無有變易」。

因此,经中要求善男子、善女人「常當繫心修此二字,佛是常住」,并限定「此常法稱要是如來,非是餘法」。梵天、自在天、我、性、微尘等世间或外道所说之常,均不属于这里所说的「常法、不變易法」。

常身又由法性与佛性两面得到说明。经称「涅槃義者,即是諸佛之法性」,但随即说「夫法性者,無有滅也」,排除将涅槃理解为灭尽、或将佛舍身理解为归于无所有。诸佛法身虽以方便作种种示现,其住处、行处与境界却非声闻、缘觉通常所能思量。佛性则被说为「無生、無滅、無去、無來」,不属三世,也不是因缘所作,故名为常;经进一步连称「佛性即是如來,如來即是法,法即是常」,并说如来、法、僧皆常、皆无为,而因缘所生的有为法皆无常。

经中另有「獲得常身」的直接叙述:如来灭除无常之色乃至无常之识,因而获得常身;此身不能用东、西、南、北等方所指明。经以火依缘而燃、缘尽而灭却不去往任何方所为喻,表明常身不可套入由生灭因缘及空间方向界定的身体观念。

《大智度論》的叙述角度不同。其「常身」紧接佛示现疾病的故事:佛已超过一切不善法,小疾并非实病,而是适应五恶之世,使后世患病比丘得向白衣求取汤药,得以安稳坐禅行道,故论断「佛為方便,非實病也」。随后世尊将说摩诃般若波罗蜜,入「三昧王三昧」,光明自足下相轮次第上升至肉髻,形成广大光焰,遍照三千大千世界乃至十方恒河沙等佛世界;诸天、人及非人共同来集,以天华、璎珞、香、莲华等供养。此处常身与方便示病、入定、放光、说般若及普受供养相连,原段并未进一步抽象辨析其体性。

三、不同部类与译本的表述差异

涅槃部《大般涅槃經》(《大般涅槃經(北本)》)交替使用「常身」「常住身」「不可壞身」「金剛之身」「法身」「如來身」,并以「佛是常住」「常住無有變易」「常法、不變易法」概括其义;讨论身心构成时作「五陰」或「陰入界」,材料中未作「五蘊」。经中还以「雜食身」与「變化身」对举法身,并说「如來常住,則名為我」,以「如來法身無邊無礙,不生不滅,得八自在」说明此处之「我」。

释经论部《大智度論》(《大智度論》)在本段直接采用「常身」,未以「法性身」「法身」等词互训;叙述重心在世尊「示」常身于「一切眾生」,以及其与般若法会庄严相连,而非逐项建立常身的体性名称。现有材料仅涉及《大般涅槃經(北本)》与《大智度論》各一文本,未提供同经异译本,故无可据以列举的同经异译用词分歧。

四、与相关概念的关系

常身与「法身」的关系,在《大般涅槃經》中是直接同一性的表述:如来常住、不可坏、非杂食之身「即是法身」;与「法性」的关系,则由法性无灭及涅槃即诸佛法性说明;与「佛性」的关系,则由佛性非因缘作、无生灭去来而名为常说明。「變化身」是如来为度众生而示现的色身,并不等同于真实杂食身;出生、疾病、长大、舍身、涅槃等相皆可属于方便示现。「涅槃」在涅槃部的表述中不是法身灭无,而与无灭的诸佛法性相联;《大智度論》本段则以常身的光明示现衔接般若说法。

五、代表性原文引用

「如來身者,是常住身、不可壞身、金剛之身、非雜食身,即是法身。」

「佛是常住。」「此常法稱要是如來,非是餘法。」

「佛性即是如來,如來即是法,法即是常。」

「如來常住,則名為我。」「如來法身無邊無礙,不生不滅,得八自在。」

「爾時,世尊以常身示此三千大千世界一切眾生。」

By SutraAI-generated

大般涅槃經(北本)T0374 · 涅槃部

《大般涅槃經(北本)》論「常身」,以如來身之常住不壞為全經核心命題。經中先標舉「如來是常、不變易法」,並嚴加簡別:此「常法」唯稱如來,非是餘法,絕不同於世間凡夫愚人所計執之梵天等常;迦葉當「如是知如來身」,善男子、善女人應「常當繫心修此二字,佛是常住」,能修此二字者即隨佛所行、至佛至處;復明「涅槃義者,即是諸佛之法性也」,而法性無有滅,故不應說如來身是滅法,如來境界非諸聲聞緣覺所知,諸佛法身以種種方便不可思議;又教於佛、法、僧三法修常想,無有異想、無無常想、無變異想,若修異想則三歸無依處、禁戒不具足,能於不可思議修常想者則有歸處。

經中最為切要之正面表述,為「如來身者,是常住身、不可壞身、金剛之身、非雜食身,即是法身」,將常身與金剛身、法身互訓合一。針對迦葉「唯見無常、破壞、微塵、雜食等身」之疑,佛誡以如來身「無量億劫堅牢難壞,非人天身、非恐怖身、非雜食身」,並出以「如來之身非身」之遮詮:不生不滅、不習不修、無量無邊、畢竟清淨、無有動搖,非有為、非業、非果、非行、非滅、非心、非數,「不可思議、常不可思議」,無識離心亦不離心,無有去來而亦去來,不破不壞、不斷不絕、不出不滅,非有非無、非一非異、非像非相而諸相莊嚴;雖度脫一切眾生而無度脫,雖不常住而非念念滅,平如虛空、同無生性、不斷不常,常行一乘而眾生見三。此一段以連綿否定掃蕩凡夫身見,正是本經論常身之獨特筆法。

經文亦從轉捨一面說常身:阿闍世王因無量人民發菩提心而重罪微薄,自言「未死已得天身,捨於短命而得長命,捨無常身而得常身」,並謂令諸眾生發阿耨多羅三藐三菩提心,即是天身、長命、常身,即是一切諸佛弟子。是常身非僅如來自證,亦與發大心、得長命相即。

又對富那,佛自述「獲得常身,是身亦非東、西、南、北」。其所以無方所,經以火聚為喻:火賴眾緣而生,緣盡則滅,滅已不至方所;如來已滅無常之色乃至無常識,現在愛滅、二十五有果報不然,以不然故不可說有東西南北,「身若是常,不得說有東西南北」;富那更以娑羅林中陳朽脫落、唯貞實在為喻,讚如來「所有陳故悉已除盡,唯有一切真實法在」。

就術語而論,本經論此概念所用之詞為「常住身」「不可壞身」「金剛之身」「非雜食身」「法身」,並單用「常身」一語;與「常身」對舉者為「無常身」「破壞」「微塵」「雜食」等凡夫身相;又常以「佛是常住」二字為繫心修習之所緣。凡此用詞,皆本經自身之面貌。

大般涅槃經(南本)T0375 · 涅槃部

《大般涅槃經(南本)》論「常身」,首先以極明確的同義表述界定如來真實之身:如來身是「常住身」、「不可壞身」、「金剛之身」,不是依雜食長養、危脆易壞的凡夫色身,而「即是法身」。經中又稱之為「如來真身」,並說其不生不滅、不破不壞、不斷不絕,畢竟清淨而不可思議;故如來示現病苦,乃為調伏眾生,不表示真身確有疾病、無常與敗壞。

經文以「常身」、「常住身」、「金剛身」、「法身」、「如來真身」及「安樂之身」等語互相申明。迦葉由此發願常思惟如來之身是常、法身、安樂之身,並為他人廣說;佛則說,護持正法是成就金剛身的因緣,並自述由往昔護法而得金剛身「常住不壞」。因此,本經在此概念上的主要用詞不是單一的「常身」,而是以常住、金剛不壞、法身及真身等詞組共同標示其義。

對於如來入般涅槃所顯現的滅相,本經特別否定由此推斷如來身是可滅之法。經說「此常法稱要是如來」,勸善男子、善女人繫心修習「佛是常住」二字;又說涅槃即諸佛法性,而法性「無有滅」,不可說「滅是法性」,亦不可說「如來身者是滅法」。如來境界及佛法身的種種方便不可思議,非聲聞、緣覺所能知;故不得以所見的捨身或涅槃相,等同於如來真身斷滅。

本經又把常身之義置於佛、法、僧的「常想」之中,要求修習三法而不起差別、無常或變異之想。經以樹與樹影為喻:如來因有常法,方能成為眾生的歸依處;若說如來無常,便不能成立為諸天世人的歸依。此處「常」不僅描述如來身不壞,也與清淨三歸是否有真實依處相連。

此外,本經以離生死法說明「獲得常身」:如來明見並宣說苦、集、滅、道,遠離一切見、愛、流、慢,具足清淨梵行與無上寂靜,因而獲得常身。此身又被說成「非是東、西、南、北」,顯示經文不以方所定位常身;所用術語仍直接稱「常身」,並由離生死、得寂靜的語境加以說明。

大智度論T1509 · 釋經論部

《大智度論》論「常身」,置於「佛身有疾」之辯難脈絡中。論中引《維摩詰經》事:阿難持鉢乞牛乳,言佛身小疾;毘摩羅詰呵止之,謂「佛為世尊,已過一切諸不善法,當有何疾」,並判此疾為「方便,非實病也」——如來以五惡世故示現病相,令未來病比丘得從白衣求湯藥而不受譏嫌。 此處論旨:佛身本無病,所示疾乃權巧,非實然。

緊接此辯難,經文即出「常身」之正面表述:「爾時,世尊以常身示此三千大千世界一切眾生。」 此句為本論所引經文原語,以「常身」與前文「小疾」之方便身對舉——方便身示疾,常身則示真實不壞之相。論中未另立異名,逕用「常身」一詞。

論主設問:「佛何以故以常身示此三千大千世界中一切眾生?」自答云:「佛欲說摩訶般若波羅蜜,入三昧王三昧,從足下相輪光明上至肉髻光焰大明。」 是知常身之示現非泛然顯異,乃為說般若之因緣而發;其相狀為通身光明,自足下相輪至頂上肉髻,遍滿三千大千世界,乃至十方恒河沙等諸佛世界皆悉大明。論以「劫盡燒時,諸須彌山王隨次燃盡」喻其光勢之盛。

就術語而言,《大智度論》直用「常身」,不另作「法身」「真身」等替換;其語境側重「常」與「方便」之對:常身為實,方便身為權。論中又引經讚佛「其德特尊,光明色像,威德巍巍」, 以光明、威德描摹常身所示之相,而非以寂滅、無相說之。此為本論論述常身之獨特側面:常身非離相之寂體,乃光明遍照、威德具足之示現,且與般若說法之事業直接相繫。

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