One day a Vinaya master asked a Zen master:
-How should one practice Tao?
The Zen master replied:
-Eat when you are hungry, sleep when you are tired.
The Vinaya master said:
-Most people do that.
The Zen master...
"It goes with a courageous intent to greet the universe as it really is, not to foist our emotional predispositions on it but to courageously accept what our explorations tell us."
"The Varieties of Scientific Experience: A Personal View of the
Search for God" (Penguin). The book is based on a series of lectures exploring the boundary between science and religion that Dr. Sagan gave in Glasgow in 1985, and it was edited by Ann Druyan, his widow and collaborator.