This is the first age that's ever paid much attention to the future, which is a little ironic since we may not have one.

Creationism, perhaps the most pernicious of the intellectual perversions now afflicting the American public.

You don't believe in organized religion, yet a major theme in so many of your works seems to be a quest for God.

No one of intelligence resents the inevitable.

As three laws were good enough for Newton, I have modestly decided to stop there.

The exploration of the planets is now closer to us in time than the exploration of Africa by Stanley and Livingstone.

Death focuses the mind on the things that really matter: why are we here, and what should we do?