The significant chemicals of living tissue are rickety and unstable, which is exactly what is needed for life.

The whole world might know you and acclaim you, but someone in the past, forever unreachable, forever unknowing, spoils it all.

An atom-blaster is a good weapon, but it can point both ways.

I don’t believe in extraordinary concatenations of coincidence.

It is change, continuing change, inevitable change, that is the dominant factor in society today. No sensible decision can be made any longer without taking into account not only the world as it is, but the world as it will be. This, in turn, means that our statesmen, our businessmen, our every man must take on a science fictional way of thinking.

Science is a mechanism, a way of trying to improve your knowledge of nature. It's a system for testing your thoughts against the universe, and seeing whether they match.

I write for the same reason I breathe - because if I didn't, I would die.