I am enough of an artist to draw freely upon my imagination. Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.

“I do not believe in the immortality of the individual, and I consider ethics to…”

“Never lose a holy curiosity.”

“You are right in speaking of the moral foundations of science, but you cannot t…”

“For a scientist, altering your doctrines when the facts change is not a sign of…”