If my doctor told me I had only six minutes to live, I wouldn't brood. I'd type a little faster.

It is in meeting the great tests that mankind can most successfully rise to great heights. Out of danger and restless insecurity comes the force that pushes mankind to newer and loftier conquests.

A scientist is as weak and human as any man, but the pursuit of science may ennoble him even against his will.

Modern science fiction is the only form of literature that consistently considers the nature of the changes that face us.

To introduce something altogether new would mean to begin all over, to become ignorant again, and to run the old, old risk of failing to learn.

If I were not an atheist, I would believe in a God who would choose to save people on the basis of the totality of their lives and not the pattern of their words. I think he would prefer an honest and righteous atheist to a TV preacher whose every word is God, God, God and whose every deed is foul, foul, foul.

People are entirely too disbelieving of coincidence.