Hello. When we mention "impermanence" (無常, anitya), most contemporary people are not unfamiliar with it. In everyday contexts, we often use it to console ourselves into accepting upheaval, or to sigh that the world is hard to predict. But on the Buddhist path of liberation, "impermanence" is by no means a glib psychological comfort or a helpless philosophical lament.
It is the engine of the entire Buddhist teaching, a scalpel for dissecting the illusions of body and mind, and the necessary gateway to ultimate freedom.
Let us set aside the arid dictionary definitions for a moment and return together to the source of the scriptures, to see what a breathtaking spectacle this word presented in the eyes of the Buddha and the bodhisattvas of successive generations.
What This Concept Is Saying
In the scriptures, "impermanence" (anitya) refers to the fact that all conditioned phenomena (有為法, saṃskṛta-dharma) — dharmas born from the conjunction of causes and conditions, fabricated and active — are in a state of arising-and-ceasing flux, transformation and decay, without a single thought-moment that abides.
The Buddhist observation of impermanence does not stop at the macroscopic level of "flowers bloom and wither, people have joys and sorrows, partings and reunions." Rather, like a microscope, it cuts with extreme minuteness into our bodily and mental phenomena. The scriptures primarily dissect impermanence through the five aggregates (五陰/五蘊, pañcaskandha) — the five constituents of body and mind — and the six sense bases (六入處, ṣaḍāyatana) — the interaction between the six sense faculties and the six external sense objects.
In order to depict with utmost precision the illusoriness and impermanence of these five bodily-mental constituents, the Buddha gave five airtight, non-confusable similes in the *Saṃyukta-āgama* (《雜阿含經》). The famous line in the *Heart Sūtra* (《心經》) — "perceiving that the five aggregates are all empty" (照見五蘊皆空) — has its original contemplative foundation precisely in the following set of stunning similes:
1. Form (色, rūpa) is like a mass of foam: The form aggregate comprises our physical body (internal form) and the external material world (external form). The scriptures compare it to a "mass of foam" (聚沫) piled on the water's surface. It appears to have a shape, but has no solid core whatsoever — it bursts at the lightest touch. 2. Feeling (受, vedanā) is like a water bubble: The feeling aggregate is the pleasant, painful, and neutral sensations we experience upon contact with external objects. The scriptures compare it to "water bubbles" (水泡) raised when heavy rain pounds the water's surface. A bubble swells up in one instant and bursts in the next — rising and perishing, never lingering even for a moment. 3. Perception (想, saṃjñā) is like a mirage: The perception aggregate is the cognitive process by which the mind seizes upon the distinguishing marks of things and affixes labels to them. The scriptures compare it to "wild horses" (野馬) — the classical Chinese term for the shimmering heat-haze drifting over spring fields, a mirage or fata morgana. It appears as though concrete objects are flowing within it, but it is entirely the illusory refraction of light and shadow. 4. Volitional formations (行, saṃskāra) are like a plantain tree: The volitional-formation aggregate is the will and psychological impulses that drive us to create karma. The scriptures compare it to the "plantain" (芭蕉) tree. The plantain has no solid woody trunk; if you try to find its core, peeling away its layers one by one, you will find nothing at the center — there is no real, substantial self anywhere. 5. Consciousness (識, vijñāna) is like an illusion: The consciousness aggregate is the root mind that discerns external objects. The scriptures compare it to "magic" (幻術) conjured by a magician. Through the coordination of various causes and conditions, it conjures out of thin air the seemingly continuous picture of a "self" and a "world," deceiving us completely.
Beyond this, impermanence is also extremely rapid and oppressive. The scriptures say that even if a martial-arts master could simultaneously catch arrows shot from all four directions, the speed at which our life's "vital process flows and changes" (命行遷變) is immeasurably faster; the body is like a box containing "four venomous snakes" — earth, water, fire, and wind — where the slightest disharmony brings death; and the five aggregates are like five "enemies who draw their swords and pursue" (拔刀隨逐) us, robbing us of our life at every moment.
The well-known saying in the *Diamond Sūtra* (《金剛經》): 「一切有为法，如梦幻泡影，如露亦如电，应作如是观」 — *"All conditioned dharmas are like dreams, illusions, bubbles, shadows, like dew and like lightning; thus should one contemplate them"* — is the most perfect summation of this arising-and-ceasing impermanence, its illusoriness and its speed.
A Walk-Through in Daily Life
Having understood the scriptural definition, let us use a scene most contemporary people know intimately — "scrolling through short videos on the subway during the evening commute" — to walk through the impermanence of the five aggregates with strict rigor.
- Form (like a mass of foam): You are staring at your phone screen. The luminous pixels on the screen (external form) and the visual nerves on your retina (internal form) are refreshing at dozens of frames per second. The most common place where people mis-map this is equating "form" solely with their own hundred-plus pounds of flesh. In fact, form includes both your physical body and the material media you see and hear. They are like a "mass of foam" — a brief aggregation of light, electricity, and cells, in which no single frame is eternal. - Feeling (like a water bubble): You scroll to a funny cat video, and a momentary pleasant sensation wells up in your heart (pleasant feeling); your finger swipes, and the next is tragic news — your heart stings for an instant (painful feeling). These feelings are like the "water bubbles" raised when rain strikes the water's surface: the previous bubble has just burst, and the next one rises. The common error is to treat "feeling" as a complex, enduring emotional narrative. In fact, feeling is only that most primitive, fastest single "electric shock" of pleasant, unpleasant, or neutral. - Perception (like a mirage): How do you know that that cluster of pixels on the screen is a "cat," and that cluster is a "news anchor"? It is your brain extracting features and affixing conceptual labels in an instant. This is "perception." It is like the "mirage" of the heat-haze, making you hallucinate a stably existing "adorable cat" out of a mass of arising-and-ceasing color blocks. People easily mistake "perception" for deliberative "thoughts," when in fact it is extremely rapid "sign-seizing recognition." - Volitional formations (like a plantain): After you finish a video, an impulse and craving arises in your heart: "swipe to the next one." This inner will that drives your finger to move is "volitional formations." You think there is a unified "I" making the decision, but if you look inward like peeling a "plantain," you will find that this is merely a chain of conditioned reflexes trained by dopamine and algorithmic mechanisms — peel to the end, and no independent soul issuing commands is to be found. Do not mistake "volitional formations" for external bodily actions (swiping the phone); they are the inner volitional fabrications. - Consciousness (like an illusion): Ultimately, there is an awareness that oversees all of this, making you feel that "'I' am watching a video." This "consciousness" is like a masterful "illusion": it seamlessly splices together your fragmentary visual (eye-consciousness), auditory (ear-consciousness), and mental consciousness, immersing you in the virtual storyline and making you forget that you are sitting on a lurching subway.
*Contemporary parallel:* Modern neuroscience confirms that the brain constructs continuous conscious experience precisely through discrete neural electrical impulses, just as algorithmic information feeds fill our attention through continuously refreshing data points. But note: science only explains the "physical phenomena" of this mechanism, whereas Buddhism points out that the purpose of seeing this arising-and-ceasing phenomenon (impermanence) is liberation — because as long as you mistake this algorithmic-like, arising-and-ceasing illusion for a real, eternal "self," you will experience suffering in the gap between craving and attainment.
Why Contemporary People Need It
Contemporary people live in a world full of uncertainty: industries are being overturned, intimate relationships are shifting, bodies are silently sliding toward sub-health. Why do we need to dive deep into the wisdom of "impermanence"?
1. Cutting off the underlying logic of suffering In the *Saṃyukta-āgama*, the Buddha gives an airtight chain of reasoning: 「色无常，无常即苦，苦即非我，非我者亦非我所。」 — *"Form is impermanent; what is impermanent is suffering; what is suffering is not self; what is not self is not mine either."* The anxiety of contemporary people is essentially rooted in "loss of control." We try to preserve love, to solidify class, to keep youth. But this is like trying to grasp a handful of water in a waterfall. When you truly see that body and mind and the external world are all "water bubbles" and "illusions" that arise and cease without abiding, you will understand that seeking eternal security within a system destined to decay is itself a futile torment. Seeing impermanence, one can "give rise to disenchantment, and delight-and-craving are exhausted" (生厭離、喜貪盡), thereby released from our death-grip on the world.
2. Awakening the urgency of life The scriptures use the metaphor of "the head and clothes being on fire" (救頭燃) to describe the urgency we should feel before impermanence. Contemporary people often feel there is plenty of time, and waste their lives in meaningless internal friction. The contemplation of impermanence is like a cold, sobering slap, reminding us that death and upheaval may descend at any moment "as if suddenly snatched away." This urgency is not meant to manufacture panic, but to focus our energy on what is truly important — such as cultivating wisdom and nurturing roots of goodness.
3. The bodhisattva path's positive transformation: exchanging the non-enduring for the enduring If you think impermanence is merely passive world-weariness, you would be quite mistaken. In the Mahāyāna *Mahāratnakūṭa Sūtra* (《大寶積經》) and other scriptures, bodhisattvas display an extraordinarily magnificent vision in the face of impermanence. The bodhisattva knows full well that this body is fragile (an impermanent body, an inferior body), but he does not therefore seek death; rather, he "exchanges this non-enduring body for the Tathāgata's solid dharma-body" (以此不堅之身，換取如來堅實法身). That is to say, since time, energy, and the flesh are doomed to decay, one might as well maximize their use before they decay — for giving, for benefiting sentient beings. Like a vast sum of money destined to expire, the wise person's course is not to weep over it, but to use it at once to purchase gold that will never depreciate.
Common Misreadings and Clarifications
Precisely because "impermanence" is so central, the general public (and even many practitioners) have developed extremely deep misunderstandings of it. We need to make a stern clarification through the scriptures:
Misreading One: Since everything is impermanent, nothing has any meaning (falling into annihilationism) - Clarification: Buddhism is absolutely not nihilism. The *Mahāratnakūṭa Sūtra* severely criticizes those practitioners who merely sit vacantly reciting "「眼是无常、意是无常」" — "the eye is impermanent, the mind is impermanent" — and then seek to annihilate body and mind entirely, condemning this as "自劬勞，非沙門行" — *"self-inflicted toil, wasted effort, not the conduct of a renunciant."* The *Vimalakīrti Nirdeśa Sūtra* (《維摩詰經》) then gives the supreme Mahāyāna view: 「諸法畢竟不生不滅，是無常義。」 — *"That all dharmas are ultimately neither arising nor ceasing: this is the meaning of impermanence."* The deep meaning of impermanence is not that a thing is born and then dies; rather, seen from the essential standpoint, the entity you thought existed never truly arose at all — everything is the flow of causes and conditions, and neither arising nor ceasing is the true reality of impermanence.
Misreading Two: Buddhism holds that absolutely nothing in the universe is eternal. - Clarification: This is one of the greatest misunderstandings of Buddhism! In the *Mahāparinirvāṇa Sūtra* (《大般涅槃經》), the Buddha reveals an extremely deep secret: the statement "all is impermanent" is merely an "expedient, non-ultimate teaching" (不了義, neyārtha) that the Tathāgata uses to counteract ordinary beings' clinging. Just as when a baby cries, the parents take a yellow leaf of a poplar tree and deceive the child by saying "this is gold," and the baby stops crying. - The Buddha points out that the world's "conditioned dharmas" (有為法) are indeed impermanent, but nirvāṇa (涅槃), buddha-nature (佛性), and the Tathāgata's dharma-body (法身) are "permanent and non-regressing" — this is the ultimate teaching (了義, nītārtha). Ordinary beings have the "four inverted views" (四顛倒) — taking the impermanent world as permanent. But some śrāvaka practitioners have a great inversion too: they study impermanence so intensely that they come to believe even the Buddha's dharma-body and nirvāṇa are impermanent. The scriptures warn that to say "the Tathāgata is impermanent" is an immense sin and suffering. We must clearly distinguish: the conditioned, arising-and-ceasing dharmas are impermanent, but the gold of the buddha-nature inherent in all beings is eternal permanence.
Misreading Three: I think I already understand impermanence, because I know that everyone must eventually die. - Clarification: Knowing that "everyone must die" or "the world changes" is only the coarsest "lifetime-level impermanence" (一期無常). What the scriptures emphasize is the body's evolution through the "ten stages" (十時) from fertilized egg, to infant, to old age, and the moment-to-moment impermanence (剎那無常) of thought-moments that "do not abide for even a single instant." If, through meditative practice, you have not seen this "lightning-flash, torrent-flood" arising-and-ceasing at the subtlest level, then our "understanding" is merely a logical concession, utterly incapable of generating the power to cut off afflictions.
A true "contemplation of impermanence" is an extremely powerful process of reversal. When we no longer mistake a mass of foam for bedrock, no longer mistake a water bubble for a home, we will no longer be held hostage by external gain and loss — and amid the towering waves of moment-to-moment arising and ceasing, we can step firmly onto that path of liberation that leads to the eternally tranquil radiance.