The Person who, among the sleeping, stays awake, shaping desire after desire—that alone is the bright one, that is Brahman, that alone is called the immortal. On it all the worlds rest, and none goes beyond it. This truly is That.
Just as 'I' is not the house, similarly, 'I' is not the body even. 'I' is in fact a spirit originating and flowing from God, a ramification of the divine entity. The value of human life or importance of the human body comes from the very realisation of this fact.
Whoever is ignorant of himself is yet more ignorant of other things; and inasmuch as a man is bound to know God, he must first know himself, in order that by rightly perceiving his own temporality he may recognize the eternity of God.