Atman, jiva and what is actually said to be reborn

The problem stated plainly

The Katha Upanishad states, in a passage the Gita later echoes closely, that the self "is not born, nor does it die... unborn, eternal, everlasting, this ancient one is not slain when the body is slain" (1.2.18). The Gita repeats this almost verbatim at 2.20, and adds the well-known image of the self as something weapons cannot cut, fire cannot burn, water cannot wet and wind cannot dry (2.23–2.24), concluding that it is unchanging, all-pervading, fixed, and eternal (2.25). Read on its own, this language does not describe something that goes anywhere or does anything at death — it describes something to which death, and by extension movement from one body to another, simply does not apply.

Yet these same texts, often within a few verses, describe rebirth as real and karma as its determining cause. The Gita moves directly from the unchanging-self passage into the "worn-out clothes" simile of 2.22, describing the embodied self as discarding and taking on bodies. Somewhere between the atman that cannot be touched by anything and the "embodied self" that changes clothes, a distinction is doing real work, and different schools locate that distinction differently.

Vedanta's standard move: jiva, not atman, transmigrates

The most widely used solution within Vedanta is to distinguish the atman as such — the pure, universal, unchanging witness-consciousness — from the jiva, the individual soul as it appears bound up with a particular mind, body, and history of action. On this account, it is strictly the jiva, not the atman in its own nature, that is said to undergo transmigration. The jiva carries the subtle body (discussed separately on this site) and the accumulated samskaras that determine the character of the next birth; the atman underlying that jiva is never actually altered by any of this, in the same way that the sky is not altered by clouds passing through it, to use an image common in later Vedantic teaching. Rebirth, on this view, happens to the jiva's apparent individuality, not to the atman's actual nature.

This move resolves the surface contradiction, but it opens a further question that the major Vedanta schools answer differently: what is the jiva's relationship to the atman, ultimately? Is the jiva a real, distinct entity, or an appearance that dissolves on correct understanding?

Advaita: transmigration as belonging to a lower order of truth

Shankara's Advaita Vedanta takes the more radical position. For Advaita, the jiva's individuality — and therefore its transmigration — belongs to the empirical or conventional level of truth (vyavaharika satya), not to the ultimate level (paramarthika satya) at which only the one undivided Brahman, identical with atman, is real. On this reading, the entire drama of rebirth, karma, and even the jiva's apparent bondage is, from the ultimate standpoint, a product of ignorance (avidya) superimposing individuality onto what is actually undivided. This does not make rebirth false in the sense of being make-believe within ordinary experience — Advaita treats it as functionally real for anyone who has not yet realised their identity with Brahman, and takes karma and rebirth entirely seriously as the operating rules of that ordinary experience — but it does mean that, strictly, nothing at the deepest level of reality is ever actually reborn, because nothing at that level was ever actually born, bound, or individual in the first place. Liberation (moksha), for Advaita, is not the jiva successfully escaping the wheel; it is the recognition that the jiva's separateness was never, at the deepest level, real to begin with.

Vishishtadvaita: the jivatman as genuinely, eternally distinct

Ramanuja's Vishishtadvaita Vedanta rejects this dissolving move. For Ramanuja, the individual soul (jivatman) is a real, eternally existing, genuinely distinct entity — not ultimately identical with, but rather an eternal mode or attribute of, the supreme Brahman (identified by Ramanuja with a personal, qualified God). On this view transmigration is not merely conventionally real pending correct understanding; it is really happening to a really distinct soul, whose individuality does not disappear even upon liberation, when the soul instead comes into an eternal, blissful, loving relationship with God rather than dissolving into an undivided absolute. This is a substantial and consequential disagreement with Advaita, not a minor variation in emphasis, and it shapes the entire devotional character of Vishishtadvaita practice, which makes considerably more sense on the premise that the individual worshipper genuinely and permanently exists as a distinct being before God.

Samkhya: purusha untouched, prakriti carries the residue

Samkhya approaches the same puzzle from a different metaphysical base, since it does not use atman/Brahman language in the Vedantic sense at all. For Samkhya, purusha — pure consciousness, of which there are held to be many distinct instances, one per individual, rather than a single universal atman — is entirely inactive and untouched by anything that happens in the world of prakriti, matter and nature, including the mind, the intellect and the process of rebirth itself. What actually transmigrates, on this account, is the subtle body, a product of prakriti carrying forward accumulated dispositions; purusha simply, mistakenly, identifies with this process through ignorance, and liberation (kaivalya, addressed separately on this site in its Yoga Sutra form) consists in that identification ending, not in purusha itself changing state. Structurally, this has real similarities to Advaita's solution — a changeless witness, a changing carrier — but it rests on Samkhya's distinct plurality of purushas rather than Vedanta's single Brahman, and the two should not be treated as the same theory in different words.

Dvaita: Madhva's eternally distinct and unequal souls

A fourth major position deserves to be set alongside Advaita, Vishishtadvaita and Samkhya: Madhva's Dvaita Vedanta, which pushes the question of real difference (bheda) further than either of the other two Vedanta schools. For Madhva, commenting on the Brahma Sutras in his Purnaprajna Bhashya, individual souls (jivas) are not only eternally and genuinely distinct from Brahman, as Ramanuja also holds, but are eternally distinct and unequal among themselves in their own intrinsic nature, prior to and independent of any particular deed done in any particular lifetime. This produces one of Dvaita's most distinctive and, to outside readers, most startling claims: souls differ from one another in their basic capacity for liberation and even, according to Madhva's doctrine of graded liberation (taratamya), in the degree of bliss they are capable of experiencing once liberated, with these differences described as belonging to the soul's own eternal svarupa rather than being produced by karma at all. Karma and rebirth, on this view, determine the timing and specific circumstances of a soul's various embodiments, but they do not create the underlying inequality between souls, which Madhva treats as simply built into the structure of reality from the start. This is a considerably harder-edged pluralism than Ramanuja's, and it means "Dvaita" should not be read as simply a slightly more devotional variant of Vishishtadvaita; the two schools disagree on a basic question about the ultimate equality or inequality of souls, quite apart from their shared rejection of Advaita's non-dualism.

The objection from personal identity, and how the schools answer it

A recurring philosophical objection to all versions of this doctrine can be put simply: if what is reborn is only a jiva, a bundle of subtle body and accumulated disposition, rather than the atman itself, in what sense is the person reborn "the same person" who died, rather than merely someone causally connected to them, resembling the relation between a parent and a very different child? Advaita's answer is, in effect, to accept a version of the difficulty and relocate it: strictly, on Shankara's account, no truly continuous individual persists across lives at the ultimate level, because no truly separate individual existed at the ultimate level even within a single life; the only thing genuinely unbroken is Brahman itself, appearing under the successive limiting conditions (upadhis) of first one jiva and then another. Vishishtadvaita and Dvaita, holding the jiva to be a real and continuously existing entity throughout, answer more directly: the same jivatman, carrying the same subtle body and samskaras, genuinely persists across the change of gross body, so that identity is preserved in the way that a person's identity is ordinarily thought to survive sleep or serious illness — through continuity of the underlying subject, not through continuity of any particular content of experience. Neither answer is offered here as a decisive resolution; the objection has generated centuries of further argument within each school, and this page reports the shape of the reply rather than adjudicating it.

Why this disagreement should be reported, not smoothed over

It would misrepresent this material to present a single tidy answer as "the Hindu view" of what is reborn. Advaita, Vishishtadvaita and Samkhya each take the unchanging-self texts and the rebirth texts seriously, and each construct a genuinely different account of how both can be true. This page reports that range rather than picking a winner, because picking a winner is not this site's place to do, and because the disagreement itself is part of what a reader ought to know about how seriously, and how variously, this question has actually been worked through within the tradition. For how the very different Buddhist answer handles the same underlying puzzle without positing any unchanging self at all, see /resources/karma/rebirth-in-buddhism.