सनातन पुस्तकालय Sanatan Cultural Library

The Upanishads begin with a deceptively simple question: who, exactly, am I? Not the name — that was given. Not the body — it changes entirely from childhood to old age while "I" persists. Not the thoughts and feelings — they arrive and depart while something watches them come and go. Peeling away every layer that can be observed, the sages arrived at the observer that cannot itself be made an object: the atman, the self as pure witness-consciousness. The Taittiriya Upanishad structures the peeling as five koshas — sheaths of food, breath, mind, intellect and bliss — with the self shining through all of them, owned by none. The atman is described as unborn and undying, "not slain when the body is slain" — the still point each of us has always called "I", mistaken all the while for its coverings.

Looking outward, the same sages asked the matching question: what is the single reality behind the many things — that by knowing which, all is known? Their name for it is Brahman, from a root meaning "to expand, to grow vast" — the limitless ground from which everything arises, in which everything rests, into which everything returns. The Taittiriya defines it operationally: that from which all beings are born, by which they live, into which they merge. Brahman is not a god among gods but the reality the gods themselves express; the many deities of the tradition are understood as its faces. Since every description is drawn from limited experience, the Brihadaranyaka finally resorts to negation — neti neti, "not this, not this" — while the positive formula sat-chit-ananda (being, consciousness, bliss) marks not qualities Brahman has but what it is.

The Upanishads' thunderclap is that the two searches end at the same place. The self found by digging within and the ground found by tracing the cosmos back are declared one — announced in the mahavakyas, the great sentences: tat tvam asi, "That thou art" (Chandogya); aham brahmāsmi, "I am Brahman" (Brihadaranyaka); prajñānam brahma, "consciousness is Brahman" (Aitareya); ayam ātmā brahma, "this self is Brahman" (Mandukya). In the Chandogya, the sage Uddalaka teaches his son Shvetaketu with homely images — salt dissolved in water, present everywhere though visible nowhere — repeating after each: that subtle essence is the self of all, and that thou art. How literally to take the identity became the great debate of Vedanta: Shankara reads it as complete oneness, Ramanuja as the intimacy of soul and body, Madhva as the dependence of the soul on the Lord. But all agree on what the sentences forbid: the self can never again be taken for something small, temporary and alone.