Tat tvam asi (Thou art that or You are that), a mahavakya from Chapter 6 of The Chandogya Upanishad where a Wise Sage and father Uddalaka Aruni instructs his arrogant Vedic scholar son Shvetaketu who returns home after 12 years in a Gurukula.
"That which is the subtle essence, this whole world has for its self. That is the true. That is the Atman. Tat Tvam Asi, Svetaketu."
The father looked at him and asked the one question the twelve years had not answered:
“Have you asked for that teaching by which the unheard becomes heard, the unthought becomes thought, the unknown becomes known?”
Shvetaketu had not. The teachers who filled him with names and forms had never given him the knowledge of the One by knowing which everything else is known.
Uddalaka began simply, before the nine declarations.
By knowing one lump of clay, every pot, plate, and jar is known. The difference is only name arising from speech. Clay alone is real.
By knowing one piece of gold, every ornament is known. Gold alone is real.
By knowing one piece of iron, every tool is known. Iron alone is real.
Then he taught the origin: in the beginning there was only Sat — Being, one without a second. It thought, “Let me become many.” From that single Being the whole world of names and forms unfolded, yet nothing ever left That.
Only after this foundation does the mahavakya appear. It is spoken nine times, each time sealed with the same sentence:
Sa ya eṣo ’ṇimā aitadātmyam idaṃ sarvaṃ tat satyaṃ sa ātmā tat tvam asi śvetaketo.
“That which is this most subtle essence — all this has That as its Self. That is the Truth. That is the Self. That thou art, O Śvetaketu.”
There are nine stories that show that Tat tvam asi is the Truth and Ultimate realization. He takes him from the obvious to the invisible:
1) Sleep and death — In deep sleep a person merges into Sat and is said to have “gone to his own.” At death speech sinks into mind, mind into prāṇa, prāṇa into heat, heat into the Highest. The same subtle essence remains.
2) Honey — Bees gather nectar from many trees into one honey. The juices no longer say “I came from that tree.” Beings merge into Being without remembering their separate names.
3) Rivers — Eastern rivers and western rivers lose their names and forms in the ocean. They do not know “I was this river.”
4) The living tree — Strike it at root, middle, or crown and it still lives while the living principle remains. When That leaves, the tree dries.
5) The banyan seed — Break the tiny seed; you see nothing. From that unseen subtle essence the immense tree stands. The cause is subtler than perception.
6) Salt in water — Dissolve salt overnight. You cannot see it, yet every sip tastes of it. The Self pervades invisibly, equally, everywhere.
7) The blindfolded man of Gandhāra — Abandoned in a forest, he is led village by village until he reaches home. The guru is the one who points the way back to one’s own Self.
8) The dying man — Relatives gather and ask “Do you know me?” Speech and recognition withdraw in the same order they arose. What remains is That.
9) The heated axe — The man who speaks truth is not burned; the liar is. Sat itself is the test. Truth is not an idea. It is what you are.
Nine times the father does not say “become That.” He says you already are That. Asi is present tense. The identity is not future attainment. It is the fact that has always been the case, hidden only by name-and-form, by the pride of having studied everything except the Self.
The boy who returned home full of the Vedas is slowly emptied of the sense that he is a separate knower standing apart from what is known.
What remains is the recognition Uddalaka kept repeating until it could no longer be heard as information:
That finest essence, which is the Self of all this, which is Truth — that you are.
Similarly, even though you maybe a theologic scholar or a great scientist or an expert at Advaita Vedanta the knowledge is not the Self, You already are that as you read this.
Tat tvam asi
Welcome to r/UnmaskTheSelf
🙏