What this concept is saying
不增不減 (*bù zēng bù jiǎn*, “neither increasing nor decreasing”) does not mean that nothing ever changes. Bodies age, skills improve, relationships deepen or deteriorate, wholesome habits grow, and afflictions can weaken. Buddhism does not deny any of this.
The phrase points to a different level: the true character of phenomena is not damaged by delusion and is not manufactured by awakening. In the formulation of the *Mahāprajñāpāramitā-śāstra* (《大智度論》, T1509), 諸法實相 (*zhūfǎ shíxiàng*, “the true aspect of all phenomena”) is “常住不動”—constantly such, unmoved. Beings distorted by ignorance do not subtract anything from it; buddhas teaching the Dharma do not add anything to it. Teaching removes confusion so that beings “還得實性，如本不異”—return to reality as it is, no different from the beginning.
The treatise illustrates this with water. Water is naturally cool; when heated by fire it becomes hot. Once the fire is extinguished, it returns to its original coolness. The cooling is not a newly manufactured nature bestowed upon the water. In the same way, when the “heat” of ignorance and attachment subsides, reality is not upgraded. What ceases is distortion.
This must be handled carefully. “Constantly abiding” does not posit an eternal substance hidden behind changing things. Such a substance would itself become something grasped as permanent, independent, and truly existent—the very kind of fixation that prajñā dismantles. What is unchanging is not a secret object. It is the fact that phenomena have never possessed the independent, self-established nature that delusion projects onto them.
The treatise unfolds this through four mutually illuminating terms:
- 如 (*tathatā*, “suchness”) means “just so”: 如本, as it originally is; 性自爾, naturally so; 無能敗壞, incapable of being ruined. Suchness is not a purified version of the world produced by meditation. It is phenomena free from our conceptual additions.
- 法性 (*dharmatā*, “Dharma-nature” or “the nature of phenomena”) is the intrinsic, ungraspable nirvāṇic character of all worldly phenomena. The treatise compares it to gold-nature in yellow ore, silver-nature in white ore, and water naturally flowing toward the sea. Practice does not insert Dharma-nature into things; wisdom follows phenomena to the point where conceptual proliferation can no longer sustain itself.
- 實際 (*bhūtakoṭi*, “the limit of reality” or “ultimate actuality”) is reality reached when fabrication and speculative proliferation have come to an end. It is not a spatial boundary or a metaphysical realm elsewhere.
- 般若波羅蜜 (*prajñāpāramitā*, “the perfection of wisdom”) is the liberating wisdom that knows this reality without appropriating it. The treatise says that suchness, Dharma-nature, ultimate actuality, and prajñāpāramitā are “非一非異”—neither simply identical nor genuinely separate. Wisdom is not an object called reality, yet wisdom does not awaken to something outside reality.
Prajñāpāramitā is neither increasing nor decreasing “因空故、離故”—because it is empty and free. Its modes of entry are 空 (*śūnyatā*, emptiness), 無相 (*ānimitta*, signlessness), and 無作 (*apraṇihita*, wishlessness or non-fabrication). These do not erase appearances. They release the mind from treating appearances as self-grounded things, from fastening onto their defining signs, and from constructing existence or nonexistence around them.
This is why the treatise directly equates “neither increasing nor decreasing” with 不生不滅 (*anutpāda-anirodha*, “neither arising nor ceasing”): “若菩薩學不生不滅法，即是學不增不減”—if a bodhisattva learns the Dharma of neither arising nor ceasing, that is precisely learning neither increase nor decrease. Things conventionally arise through conditions and cease when those conditions disperse. But when examined for a self-existing essence that genuinely comes into being or passes out of being, none can be found. Their 自相空 (*svalakṣaṇa-śūnyatā*, “emptiness of intrinsic characteristics”) is therefore neither produced nor destroyed.
The familiar formulation appears in Xuanzang’s *Heart Sūtra* (《般若波羅蜜多心經》): “是諸法空相，不生不滅，不垢不淨，不增不減”—“The empty character of all phenomena neither arises nor ceases, is neither defiled nor pure, and neither increases nor decreases.” The wording can be checked in the [CBETA electronic text preserved by National Taiwan University’s Buddhist Digital Library](https://buddhism.lib.ntu.edu.tw/BDLM/sutra/html/T08/T08n0253.htm). The grammatical center is 諸法空相, the empty character of phenomena: the sūtra is not saying that every measurable feature of the world remains numerically constant.
The concept therefore occupies a decisive place on the path of liberation. Ethical discipline, meditation, compassion, and insight remain indispensable; conventionally, they cultivate wholesome capacities and weaken affliction. Ultimately, however, awakening is not the acquisition of a more splendid self. Practice removes attachment, but it does not manufacture reality. The path changes how one lives because it reveals what was never altered by one’s confusion.
A walk-through in everyday life
Imagine opening your phone on the commute and seeing a message from your partner: “We need to talk tonight.” Within seconds, an entire world appears.
First there is 色 (*rūpa*, “form”): not merely your body, but all material form derived from the four great elements. It includes the body holding the phone, muscular tension, the screen and train, light entering the eye, and the material environment around you. To reduce 色 to “the physical body” would be too narrow; external material objects belong here as well.
Next there is 受 (*vedanā*, “feeling tone”): the experience is unpleasant, pleasant, or neutral. Here it may be the immediate unpleasant contraction accompanying the message. 受 is not the developed emotion “my partner is going to leave me.” It is the affective tone through which contact is tasted.
Then 想 (*saṃjñā*, “perception and recognition”) takes up signs and identifies them. It recognizes the words, the sender, the phrase “we need to talk,” and perhaps the resemblance to earlier conflicts. 想 is not simply “thought” or imagination. Its defining work is taking a mark and recognizing: *this is that kind of thing*.
Then 行 (*saṃskāra*, “volitional formations”) gathers the intentions, impulses, habits, and constructive mental forces that lean toward a response: reread the message, draft an accusation, withdraw, rehearse a defense, or pause and ask a gentle question. 行 does not mean outward “action” alone. The message may remain unanswered while resentment, fear, avoidance, and competing intentions are already being formed.
Finally, 識 (*vijñāna*, “consciousness”) is the discriminative awareness occurring in dependence on a sense faculty and its object—the visual consciousness of the displayed words and the mental consciousness that knows the remembered and imagined material. It is not a permanent observer standing behind the other four.
All five are changing conventionally. The train moves; bodily tension rises; unpleasant feeling pulses; recognition selects threatening signs; volitions branch into possible reactions; moments of consciousness occur in dependence on conditions. “Neither increasing nor decreasing” does not ask you to deny those changes.
Instead, investigate what appears to be increasing. Has the message added a fixed entity called “rejection” to reality? Has fear subtracted an independently existing quantity called “my worth”? Or have material conditions, feeling tone, recognition, habitual formations, and consciousness assembled a persuasive interpretation?
This does not mean the relationship problem is imaginary. Your partner may indeed be hurt, and ethical responsibility may require apology, change, or even separation. Emptiness is not an excuse to dismiss conventional consequences. What is empty is the supposedly self-established verdict—“I am unlovable,” “they are entirely against me,” “this feeling proves the future”—that the mind builds from conditioned events.
Now suppose you pause, feel the unpleasant tone without making it a prophecy, notice recognition selecting old memories, and refrain from sending the defensive reply. Something real has changed: an unwholesome impulse has weakened, restraint has strengthened, and a less harmful conversation has become possible. On the conventional level, cultivation matters enormously.
But the pause has not injected emptiness into the message. Nor has it made suchness purer. It has interrupted the grasping that concealed how the event already depended upon innumerable conditions and possessed no solitary essence. This is the water analogy in lived form: the fire is no longer being fed; the water is not awarded a new nature.
The same walk-through works with algorithmic life. A recommendation system amplifies certain content; repeated exposure conditions recognition; feeling tone drives another swipe; volitional habits prepare the next click; consciousness keeps arising with each new object. This comparison can help us see conditionality, but it is only an analogy. A human stream of experience is not thereby proved to be identical to an algorithm, and contemporary neuroscience has not scientifically established Buddhist emptiness. Scientific models address measurable mechanisms; prajñā examines grasping, intrinsic existence, and liberation. The questions overlap at points, but neither discipline should be quietly substituted for the other.
Why contemporary people need it
Contemporary life trains us to interpret ourselves as projects whose value must continually increase. More productivity, followers, qualifications, emotional control, fitness, insight, and even spiritual attainment seem necessary before we may regard ourselves as whole. When the numbers decline, we experience ourselves as diminished.
“Neither increasing nor decreasing” cuts beneath that economy of self-worth. Failure can reduce income, reputation, health, or opportunity; Buddhism does not ask us to pretend otherwise. But no event can subtract an independently existing essence of “me,” because no such essence was ever established. Conversely, success can expand our abilities and responsibilities, but it cannot add metaphysical worth to a self that exists from its own side.
This insight protects practice from becoming another optimization program. A meditator may count hours, retreats, calm states, insights, or praise from teachers and quietly imagine awakening as spiritual capital accumulating around an improved identity. The treatise blocks that appropriation. Even attachment to impermanence, suffering, non-self, impurity, or emptiness must eventually be relinquished. These contemplations are medicines; they are not new dogmas from which to manufacture a superior self.
That does not make cultivation pointless. Precisely because causes and conditions function, generosity can be learned, attention stabilized, harmful habits abandoned, and compassion enlarged. In conventional terms, wisdom and merit grow. In ultimate terms, the nature of phenomena does not become five percent emptier when one meditates well.
This is the middle between two discouraging extremes. One extreme says, “I am fundamentally damaged and must fabricate a worthy self.” The other says, “Everything is already perfect, so nothing needs to be done.” The first mistakes distortion for an essence; the second mistakes ultimate non-acquisition for conventional completion. The bodhisattva path avoids both: nothing ultimate is manufactured, yet suffering and its conditions are met with tireless care.
That is also why this teaching can support compassion. If anger, addiction, vanity, or fear were a person’s permanent core, liberation would be impossible. If they were unreal in the ordinary sense, help would be unnecessary. Because they are conditioned and empty, they can change; because they bring suffering conventionally, they must be addressed. The person is not reduced to the affliction, and the affliction is not waved away.
The culmination is 阿耨多羅三藐三菩提 (*anuttarā-samyak-saṃbodhi*, “unsurpassed complete awakening”). Yet even awakening is not treated as a possession added to an enduring owner. Prajñā brings the bodhisattva to awakening by ending appropriation—including appropriation of prajñā itself. Liberation is transformative without being metaphysical acquisition.
Common misunderstandings and clarifications
“Neither increasing nor decreasing means change is unreal.” No. Prices rise, forests shrink, bodies heal, memories fade, and actions bear consequences. Increase and decrease function conventionally. The teaching denies that phenomena possess an independent essence that literally enters existence, accumulates itself, or is annihilated. Emptiness must never be used to obscure material facts or avoid responsibility.
“It means everyone is already enlightened.” It means reality is not produced by enlightenment. It does not mean ignorance and awakening are experientially or ethically interchangeable. A person lost in delusion suffers and causes suffering; a buddha does not. What differs is obscuration, realization, conduct, and liberating capacity—not an increment added to the nature of reality.
“It describes a pure, permanent Self hidden inside us.” That would turn suchness into precisely the kind of independently existing object that prajñā refuses to grasp. “常住不動” here names the invariance of reality’s suchness, not an eternal personality or metaphysical soul. Suchness cannot be possessed as “my true essence.”
“If Dharma-nature is already present, practice is unnecessary.” Ore having gold-nature does not make a goldsmith’s work redundant; water tending toward the sea does not mean every obstruction is already cleared. The analogies indicate that Dharma-nature is not newly installed by practice. They do not erase the causal work of ethics, concentration, wisdom, and compassion.
“If practice removes defilement, purity must increase.” Purity of conduct and clarity of mind can indeed increase conventionally. But 法性清淨, the purity of Dharma-nature, is not a substance polished into greater quantity. The treatise says that ignorance is removed and true nature is realized “如本不異”—as originally so, without alteration.
“Emptiness is the final view to hold tightly.” The treatise explicitly warns against replacing attachment to permanence, pleasure, self, purity, and substantial existence with attachment to impermanence, suffering, non-self, impurity, or emptiness. Prajñā breaks fixation on views; it does not destroy non-grasping and then enthrone “everything is empty” as a new ideology.
“Non-fabrication means passivity.” 無作 does not prohibit compassionate activity. It releases the fabrication of things as inherently existent and the craving that tries to secure a self through them. A bodhisattva may act with extraordinary energy while not constructing an independently existing agent, action, and recipient.
“Nothing is gained, so the path has no result.” The path ends fear, confusion, and compulsive appropriation; its liberating effect is not denied. What is denied is that awakening becomes an object owned by a newly completed self. The paradox is deliberate: because there is no fixed essence to defend or enlarge, transformation is possible; because reality was never damaged, transformation need not culminate in self-congratulation.
In the end, “neither increasing nor decreasing” is not a comforting claim that everything is fine. It is a more demanding freedom. It asks us to repair what is harmful without converting harm into an identity; to cultivate what is wholesome without converting virtue into property; and to walk the entire path without imagining that awakening makes reality more real. Delusion does not diminish suchness. Practice does not embellish it. When grasping exhausts itself, things are met—as the treatise says—“如本不異”: just as they have always been.