A million million years gives us some time to prepare for the end . . . let us make the best of it.

He will see himself and life and the world as truly as our human limitations will permit; realizing the brevity and minuteness of human life, he will realize also that in individual minds is concentrated whatever of value the known universe contains.

Broadly speaking, we are in the middle of a race between human skill as a means and human folly as an end.

Suppose atomic bombs had reduced the population of the world to one brother and sister; should they let the human race die out?

Calculating machines do sums better than even the cleverest people… As arithmetic has grown easier, it has come to be less respected.

Do not feel envious of the happiness of those who live in a fool's paradise, for only a fool will think that is happiness.

The Ten Commandments should be headed like an examination paper: No more than six to be attempted.