“I'm sure the universe is full of intelligent life. It's just been too intelligent to come here.”

“Two possibilities exist: either we are alone in the Universe or we are not. Both are equally terrifying.”

“They had not yet attained the stupefying boredom of omnipotence; their experiments did not always succeed.”

“After their encounter on the approach to Jupiter, there would aways be a secret bond between them---not of love, but of tenderness, which is often more enduring.”