Same texts, different readings The three schools — Advaita, Viśiṣṭādvaita, and Dvaita — each wrote commentaries (bhāṣyas) on the same three texts: the Upanishads, the Bhagavad Gītā, and the Brahmasūtras. The existence of three incompatible readings of the same texts is itself philosophically significant. This page presents each school's position as its proponents state it — not as a debate to be adjudicated.
Question Advaita
Śaṅkarācārya · c. 788–820 CE
Viśiṣṭādvaita
Rāmānuja · c. 1017–1137 CE
Dvaita
Madhvācārya · c. 1238–1317 CE
What is Brahman? Nirguṇa Brahman — attributeless, beyond all qualities. All descriptions are provisional pointers. Saguṇa Brahman (God with qualities) is Brahman as viewed through māyā. Saguṇa Brahman — Brahman necessarily has attributes (knowledge, bliss, perfection). Viṣṇu/Nārāyaṇa is the personal form of this Brahman. Attributelessness would mean non-existence. Viṣṇu alone is independent Brahman — absolutely supreme, fully personal. He is the cause of the universe, controller of all souls, object of devotion.
Is the world real? Vyāvahārika satya — empirically real, practically real, but not ultimately real. The world is Brahman appearing through māyā. Not a creation but an apparent modification. Fully real — the world is the body of Brahman. Creation is a genuine transformation of Brahman's śakti (power). The world's reality is not diminished by being dependent on Brahman. Fully real and independent in its existence (though dependent on God for its being). The material world is neither God nor part of God.
Is the self identical to Brahman? Yes, fully and completely. Jīva = Brahman. The appearance of difference is due to upādhis (limiting conditions) which dissolve in liberation. Tat Tvam Asi is taken literally. No. The soul (jīva) is a real, eternal individual — a mode (prakāra) of Brahman, like a limb of a body. Eternally distinct in constitution, though inseparable from and dependent on Brahman. No. Souls and Brahman are eternally, absolutely, and fundamentally different. Five eternal distinctions (pañcabheda): God vs soul, God vs matter, soul vs soul, soul vs matter, matter vs matter.
What is liberation (mokṣa)? Recognition that the self was always Brahman. Not a new state achieved but a false identification removed. Jīvanmukti — liberation while still living — is possible. Eternal proximity to Viṣṇu in Vaikuṇṭha. The liberated soul retains its individual identity and enjoys the bliss of God's presence. No merger into Brahman. Eternal beatific enjoyment of God's presence — the soul's bliss in contemplating God. Individual identity is fully retained. Absolute merger with God is impossible and undesirable.
How is liberation attained? Jñāna alone — direct knowledge of Brahman-Ātman identity, occasioned by the Mahāvākya heard from the teacher. Karma and upāsanā prepare the mind but do not produce liberation directly. Bhakti (devotion) combined with jñāna and karma. Prapatti (complete surrender to God) is also taught as an alternative direct path. God's grace (prasāda) is essential. Bhakti alone, sustained by jñāna and karma. God's grace (anugraha) is absolutely necessary — liberation cannot be achieved by the soul's own effort alone.
What does "Tat Tvam Asi" mean? Identity statement — the individual self and Brahman are one and the same. Bhāgalakṣaṇā reading: both terms shed their limiting adjuncts and the remaining pure consciousness is identical. The soul shares Brahman's essential nature (jñāna, ānanda) but is not numerically identical with Brahman. Tvam = the soul as a real mode of Brahman. Not absolute identity. Not an identity statement at all. Tat = Brahman who is the inner controller of the soul. Tvam = the soul, which is dependent on and controlled by Brahman. Indicates the relationship of controller and controlled.
Key text emphasis Māṇḍūkya, Bṛhadāraṇyaka, Chāndogya Upanishads. The Mahāvākyas. Gauḍapāda's Kārikā. Chāndogya, Bṛhadāraṇyaka — but interpreted as teaching qualified non-dualism. The Divya Prabandham (Tamil Vaishnava hymns) as supplementary canon. Bṛhadāraṇyaka, Chāndogya — interpreted as teaching absolute distinction. Madhva's own Anuvyākhyāna and Brahmasūtra Bhāṣya are foundational.
Why the disagreement is real, not terminological

The three schools are not disagreeing about words. They are disagreeing about what reality is — and about what the Upanishads actually teach. All three had access to the same texts. All three were first-rate philosophers. The persistence of the disagreement across twelve centuries is evidence that the question is genuinely difficult, and that the canonical texts are genuinely open to more than one reading.

Advaita's reading of Tat Tvam Asi requires the bhāgalakṣaṇā (part-implication) analysis — both tat and tvam shed their surface meanings to reveal an underlying identity of pure consciousness. Rāmānuja's reading requires no such technical apparatus: tvam means the soul as it is, and the soul as it is is genuinely distinct from Brahman even while being Brahman's mode. Madhva's reading is even more direct: the word asi (art) does not assert identity but the intimate relationship of the controlled and the controller.

The disagreement touches every major question in Indian philosophy: the nature of causation, the ontological status of the world, the relationship of knowledge to liberation, the role of God's grace, and whether a personal God is philosophically necessary. Studying the disagreement is one of the richest routes into the depth of the tradition.