There is no vaccine against stupidity.

Imagination without knowledge may create beautiful things, knowledge without imagination can create only perfect ones.

During the last century, and part of the one before, it was widely held that there was an unreconcilable conflict between knowledge and belief.

Out of the clutter find Simplicity

Everything has changed except the way man thinks (when the hydrogen bomb was exploded)

I don't know what weapons will be used in the Third World War. But I can tell you what they'll use in the Fourth - rocks!

In quitting this strange world he has once again preceded me by a little. That doesn't mean anything. For those of us who believe in physics, this separation between past, present, and future is only an illusion, however tenacious.