Aitareya Upanishad

The Aitareya Upanishad, belonging to the Rig Veda, is named after the sage Mahidasa Aitareya, and forms part of the Rig Veda's own Aitareya Aranyaka. It is a comparatively short Upanishad, yet its account of creation is remarkably profound. It opens with the declaration: "atma va idam eka evagra asit, nanyat kinchana mishat" — in the beginning, this was the Self alone, one, and nothing else whatsoever stirred. This lone Self resolved, "let me create worlds," and so brought forth the various worlds — the world of water above, the world of light, the world of death (earth), and the innermost world of waters below.

Next, the Self thought, "now these worlds have come into being; let me now create their guardians," and from the waters it drew forth and shaped a Purusha. As it brooded over this Purusha, warming it into life, a mouth broke open, as though hatching from an egg — from the mouth, speech; from speech, fire (Agni). In this same way, nostrils broke open, and from them, breath; from breath, wind (Vayu). Eyes broke open, and from them, sight; from sight, the sun (Aditya). Ears broke open, and from them, hearing; from hearing, the directions of space. Skin broke open, and from it, hair; from hair, plants and trees. The heart broke open, and from it, mind; from mind, the moon. The navel broke open, and from it, the downward breath (apana); from apana, death. And the organ of generation broke open, and from it, seed; from seed, the waters.

This account is extraordinary — it establishes a direct, structural relationship between the human body and the cosmos. The human body is no separate thing from the universe at all — it is a small mirror of that very same creative process. The powers that operate in the outer world as fire, wind, the sun, the directions, and the moon operate, within the human being, as speech, breath, sight, hearing, and mind. This view came to be established in later Indian thought as the principle "pinde brahmande" — what is in the body is in the cosmos.

But this assembly of deities fell into the vast ocean of this world, and the Self afflicted them with hunger and thirst. They pleaded with the Self to find them an abode where they might be established and take food. The Self first brought forth a cow before them — they were not satisfied; then a horse — again, not satisfied; and finally, the Self brought forth a human being, and the deities, delighted, said, "sukritam bata" — this indeed is a well-made thing! This declaration reveals that the human body is the finest of all possible dwellings in which these divine powers may find their fullest expression — an expression not possible in any animal form.

The Self then commands each deity to enter its own proper place — Agni becomes speech and enters the mouth; Vayu becomes breath and enters the nostrils; Aditya becomes sight and enters the eyes; the directions become hearing and enter the ears; plants and trees become hair and enter the skin; the moon becomes mind and enters the heart; death becomes apana and enters the navel; and the waters become seed and enter the organ of generation. At the end, hunger and thirst too ask the Self for their own place, and the Self makes them co-partners in these very deities — and this is why, whenever an oblation is offered to any deity, hunger and thirst are understood to share in it as well. This entire account reveals that the human body is a sacred temple, built to be the dwelling place of the gods — never merely a frame of flesh and bone.

The second chapter raises a wonderfully original question — by what path does the Self enter the body, and how many births does a human being have? The Upanishad explains that the Self considered that if it entered through some ordinary channel — speech, breath, the eye, or the ear — it would become entangled in the body's ordinary functions and lose its own distinct nature. And so the Self split open that subtle suture at the crown of the skull (called "vidriti") and entered through that very special door — a door also known as "hita," since it is the door both of the Self's own bliss and of the body's coming to life.

The Upanishad then presents a profoundly original teaching on the three births of a human being. The first birth occurs when the essential vital fluid of every part of the father's body, gathered together as seed, is placed within the mother's womb — this moment is understood as the father's own rebirth, since the father is, in this act, sending forth his very own essence to continue onward; from this vantage, father and son are never two separate individuals, but two expressions of one single continuity.

The second birth is the child's actual birth from the mother's womb — this is birth in the ordinary sense of the word. The third birth, and the deepest of all, occurs when, after the father's death, the son takes up his father's accumulated duties, responsibilities, and legacy upon his own shoulders — in this way, the father continues to live on through his son. The essence of this threefold doctrine of birth is that there exists no rigid boundary between individual identity and the continuity of a lineage — life's stream flows forward, generation after generation, as one single, unbroken continuity.

In this same context, the Upanishad offers the example of the sage Vamadeva, who is said to have recognized this very truth even while still within the womb, and, rising up from within the body on the strength of this knowledge, attained all his desires in the heavenly world and became immortal. This example makes a remarkably bold claim — it shows that Self-realization does not depend on any particular age, experience, or outer circumstance; it is a state of consciousness that is, in principle, possible at any moment of life — even, as it were, before birth itself.

The third and final chapter of the Upanishad reaches its own summit with a fundamental question — "ko'yam atmeti vayam upasmahe, kataraḥ sa atma" — this Self that we worship — who is it? Which one, exactly, is the Self? Is it that by which we see, or that by which we hear, or by which we smell odors, or by which we utter speech, or by which we distinguish the sweet from the sour? Or is it the heart and the mind — consciousness (samjnana), cognition (ajnana), discernment (vijnana), intelligence (prajnana), understanding (medha), insight (drishti), steadfastness (dhriti), thought (mati), reflection (manisha), impulse (juti), memory (smriti), resolve (sankalpa), will (kratu), the life-force (asu), desire (kama), and volition (vasha) — what are all of these, in the end?

The Upanishad's answer is remarkably bold — it declares that all of these, however different they may appear, are, in truth, nothing but names for that one same reality, consciousness (prajnana). This very consciousness is Brahma; it is Indra; it is Prajapati; this same consciousness exists in every deity, in the five great elements (earth, water, fire, air, and space), and in every small and large being — whether born from an egg, from a womb, from moisture, or sprouted from a seed — in horses, cattle, human beings, elephants, in whatever breathes, whether moving or flying, and whatever remains still. All of this is guided by consciousness, and all of this is established in consciousness; consciousness is the very eye of the universe, and consciousness is its foundation.

At the close of this extensive list comes that Mahavakya — one of the four great declarations counted among all Upanishadic literature — "prajnanam brahma" — consciousness is Brahman. This declaration reveals that Brahman is no distant, abstract entity at all — it is that very consciousness which, at this very moment, is engaged in seeing, hearing, understanding, and experiencing within us. Just as every wave of the ocean is, in the end, nothing but water, every activity of the mind — memory, resolve, desire, discernment — is, in the end, nothing but a ripple of that one root consciousness.

The Upanishad closes once more with the example of the sage Vamadeva — through this very knowledge, he rose above this world, attained all his desires in the heavenly world, and became immortal. This Mahavakya, "prajnanam brahma," holds particular significance because, alongside the other three great declarations — "aham brahmasmi" (I am Brahman), "tat tvam asi" (That thou art), and "ayam atma brahma" (this Self is Brahman) — it forms the foundational quartet of Vedanta, one drawn from each of the four Vedas, each pointing, in its own words, toward that very same non-dual truth — consciousness alone is the final, indivisible reality.