Chandogya Upanishad
Prapathaka VII, Khanda 25
'The Infinite indeed is below, above, behind, before, right and left--it is indeed all this. 'Now follows the explanation of the Infinite as the I: I am below, I am above, I am behind, before, right and left--I am all this.
'Next follows the explanation of the Infinite as the Self: Self is below, above, behind, before, right and left--Self is all this. 'He who sees, perceives, and understands this, loves the Self, delights in the Self, revels in the Self, rejoices in the Self--he becomes a Svarâg, (an autocrat or self-ruler); he is lord and master in all the worlds. 'But those who think differently from this, live in perishable worlds, and have other beings for their rulers.