Heaven is not as narrowly literal-minded as hell.

There are some ideas so stupid that only intellectuals can believe in them, particularly left-wing intellectuals.

He had seen too much of the cosmos to have any great faith in man's ability to understand it.

Why do people in this age think their own impoverished lives must be the norm of the universe?

What five books would I like to be remembered for? Well... Tau Zero, I like that one especially. It was somewhat of a tour de force, and I think it got across what I was trying for.

The fish that first ventured ashore had considerable practical problems.

We live with our archetypes, but can we live in them?