Naturally, there's got to be a limit for I don't expect to live forever, but I do intend to hang on as long as possible.

It was childish to feel disappointed, but childishness comes almost as naturally to a man as to a child.

Increasingly, our leaders must deal with dangers that threaten the entire world, where an understanding of those dangers and the possible solutions depends on a good grasp of science. The ozone layer, the greenhouse effect, acid rain, questions of diet and heredity. All require scientific literacy. Can Americans choose the proper leaders and support the proper programs if they themselves are scientifically illiterate? The whole premise of democracy is that it is safe to leave important questions to the court of public opinion - but is it safe to leave them to the court of public ignorance?

The world of A.D. 2014 will have few routine jobs that cannot be done better by some machine than by any human being. Mankind will therefore have become largely a race of machine tenders.

The most exciting phrase to hear in science, the one that heralds new discoveries, is not 'Eureka!' but 'That's funny...'

A fire-eater must eat fire even if he has to kindle it himself.

Any teacher that can be replaced by a computer should be replaced by a computer.