The Self

The Self thought, "How can this be without me?
If speaking is done by speech, breathing by
Breath, seeing by eyes, hearing by ears, smelling
By nose, and meditation by the mind,
Then who am I?" Entering the body
Through the gateway at the crown of the head,
He passed into the three states of consciousness
In which the Self resides.

-Aitareya Upanishad