The Brihadaranyaka Upanishad is a highly advanced philosophical and mystical text, of ancient India. This passage expounds the Real Self.
Passage
He who dwells in the seed, and within the seed, whom the seed does not know, whose body the seed is, and who pulls (rules) the seed within, he is thy Self, the puller (ruler) within, the immortal; unseen, but seeing; unheard, but hearing; unperceived, but perceiving; unknown, but knowing. There is no other seer but he, there is no other hearer but he, there is no other perceiver but he, there is no other knower but he. This is thy Self, the ruler within, the immortal.
Max Muller. The Sacred Books of The East. The Oxford University Press, 1884.
