Never during its pilgrimage is the human spirit completely adrift and alone. From start to finish its nucleus is the Atman, the god-within... underlying its whirlpool of transient feelings, emotions, and delusions is the self-luminous, abiding point of the transpersonal god. As the sun lights the world even when cloud-covered, the Immutable is never seen but is the Witness; it is never heard but is the Hearer; it is never thought but is the Thinker; it is never known but is the Knower. There is no other witness but This, no other knower but This. from the Upanishad