The greatest inventors are unknown to us. Someone invented the wheel - but who?

It is quite clear that as long as the nations of the world spend most of their energy, money, and emotional strength in quarreling with words and weapons, a true offensive against the common problems that threaten human survival is not very likely. A world government that can channel human efforts in the direction of the great solutions seems desirable, even essential. Naturally, such a world government should be a federal one, with regional and local autonomy safeguarded and with cultural diversity promoted.

The intelligent man is never bored.

Arthur Clarke says that I am first in science and second in science fiction in accordance with an agreement we have made. I say he is first in science fiction and second in science.

There is an art to science, and a science in art; the two are not enemies, but different aspects of the whole.

Maybe happiness is this: not feeling like you should be elsewhere, doing something else, being someone else.

When stupidity is considered patriotism, it is unsafe to be intelligent.