Impermanence

Impermanence, often called the philosophical problem of change, appears across multiple religions and philosophical systems. In Eastern thought, it is central to Buddhism as one of the three marks of existence and also holds importance in Hinduism. In Western philosophy, it first emerged in Greek thought through Heraclitus and his doctrine of *panta rhei* (everything flows), where it is also known as becoming.

**Indian religions** The Pali term for impermanence, *anicca*, combines the prefix "a" (non-) with "nicca" (constant, continuous, permanent). While *nicca* denotes continuity and permanence, *anicca* signifies the absence of these qualities. It is synonymous with the Sanskrit *anitya* (a + nitya). The concept appears prominently in Buddhism and is also found in various schools of Hinduism and Jainism, as well as in the Rigveda.

**Buddhism** In Buddhism, impermanence (*anicca* in Pāli, *anitya* in Sanskrit) is a core doctrine extensively discussed in the Pali Canon. It asserts that all conditioned existence is transient, evanescent, and inconstant. Every temporal thing—whether material or mental—is a compounded object in continuous change, subject to decline and destruction. Physical and mental events are not metaphysically real; they are neither constant nor permanent, arising and dissolving.

**Hinduism** The term *anitya* appears in verse 1.2.10 of the Katha Upanishad, a Principal Upanishad, where it describes the impermanence of objects and life. It teaches that the material world is impermanent, but this impermanence offers an opportunity to attain what is permanent (*nitya*), as the scripture presents its doctrine of the Self (Atman). The term also appears in the Bhagavad Gita in a similar context. In Chapter 2, Krishna explains to Arjuna the distinction between the eternal soul (*atman*) and the perishable material world: the body decays and dies, but the soul remains undying and unchanging. This teaching encourages detachment from material concerns and understanding of the eternal self, reorienting Arjuna from immediate battlefield concerns to broader spiritual dimensions, urging him to perform his duty without attachment to outcomes.

Buddhism and Hinduism both share the doctrine of *anicca* or *anitya*—that nothing lasts and everything is in constant change—but they disagree on the *anatta* doctrine, regarding whether the Self exists. Even in their impermanence theories, the traditions differ: Buddhism asserts that change associated with *anicca* and attachments produces sorrow (*dukkha*) and must be discarded for liberation (*nibbana*), while Hinduism holds that not all change and attachments lead to *dukkha*, and some change—mental, physical, or self-knowledge—leads to happiness and should be sought for liberation (*moksha*). In Buddhism, the permanent (*nicca*) is *anatta* (non-soul); in Hinduism, the permanent (*nitya*) is *atman* (Self) and the cosmic Self (Brahman).

**Western philosophy** Impermanence first appears in Greek philosophy with Heraclitus and his doctrine of *panta rhei* (everything flows). He insisted that ever-present change is the fundamental essence of the universe, famously stating, "No man ever steps in the same river twice." This is considered a key contribution to the concept of becoming, contrasted with "being," and is sometimes seen in a dialectical relationship with Parmenides' statement that "whatever is, is, and what is not cannot be." Parmenides and Heraclitus are commonly regarded as founders of ontology, though scholars have debated which philosopher was responding to the other. Heraclitus also held a stark commitment to the unity of opposites, saying "the path up and down are one and the same," characterizing all entities by pairs of contrary properties such that no entity may occupy a single state at a single time. This, along with his cryptic statement that "all entities come to be in accordance with this Logos," has been widely interpreted.

Impermanence was widely but not universally accepted among later Greek philosophers. Democritus' atomic theory held that assemblages of atoms were impermanent. Pyrrho declared everything *astathmēta* (unstable) and *anepikrita* (unfixed). Plutarch commented that if nature is subject to the same conditions as time, it has no permanence or "being," but is becoming and perishing in relation to time. The Stoic Marcus Aurelius, in his *Meditations*, wrote that everything existing is already fraying, in transition, and subject to fragmentation and rot (10.18). Plato, however, rejected impermanence, arguing against it.