The impermanent has no reality; reality lies in the eternal. Those who have seen the boundary between these two have attained the end of all knowledge. Realize that* which pervades the universe and is indestructible; no power can affect this unchanging, imperishable reality. The body is mortal, but that* which dwells in the body is immortal and immeasurable.
—The Bhagavad Gita, Chapter 2, translation and notes by Eknath Easwaran
*Tat, “that,” is an ancient name for Brahman, the supreme reality. Brahman is neither masculine nor feminine; in fact, it has no attributes at all. It is impossible to describe Brahman in words, so it simply pointed to: tat.