Deha-Ātma-Bhrānti — The Root Error That Perpetuates Saṃsāra
Deha-ātma-bhrānti ('the confusion/error of body-as-soul'; deha = body, ātma = soul, bhrānti = error, delusion, mistaken identification) names the primary cognitive error that, in Viśiṣṭādvaita and broader Vedāntic analysis, perpetuates the soul's bondage in saṃsāra — the cycle of birth, death, and rebirth.
The error works as follows: the jīva (conscious soul) inhabits a material body. The body's experiences — pleasure, pain, hunger, aging, death — are felt by the soul because the soul is the body's śarīrin (inner controller and experiencer). When the soul confuses itself with the body — thinking 'I am this body; this body's pleasure is my pleasure; this body's death is my death' — it has committed deha-ātma-bhrānti. The result is that the soul begins to act in service of the body's needs and desires (deha-dharma), accumulating karma and perpetuating the cycle of rebirth to fulfill those desires.
The antidote in Viśiṣṭādvaita is ātma-jñāna — correct knowledge of the self's nature: the jīva is a pure conscious being (cit), distinct from the body (acetana), and essentially related to Bhagavān as His śeṣa (dependent servant). When this knowledge is properly established, the soul ceases to identify its welfare with bodily welfare, ceases to accumulate karma for the body's sake, and begins to orient itself toward its true goal — Bhagavad-anubhava (the experience of Bhagavān) in Śrīvaikuṇṭham.
Nammāzhvār's Tiruvāimoḷi and the Āchāryas' commentaries repeatedly return to this theme — the soul's profound relief at discovering its true identity as Bhagavān's own, distinct from the perishable body. The Āzhvārs sang with joy about 'leaving behind' the body-consciousness (deha-ābhimānam) through the grace of Bhagavān.