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

Philosophy, though unable to tell us with certainty what is the true answer to the doubts which it raises, is able to suggest many possibilities which enlarge our thoughts and free them from the tyranny of custom.

Never let yourself be diverted, either by what you wish to believe, or what you think could have beneficent social effects if it were believed; but look only and solely at what are the facts.

Another merit of home is that it preserves the diversity between individuals. If we were all alike, it might be convenient for the bureaucrat and the statistician, but it would be very dull, and would lead to a very unprogressive society.

The most essential characteristic of scientific technique is that it proceeds from experiment, not from tradition.

There are still many people in America who regard depressions as acts of God. I think Keynes proved that the responsibility for these occurrences does not rest with Providence.

Civilized life has altogether grown too tame, and, if it is to be stable, it must provide a harmless outlets for the impulses which our remote ancestors satisfied in hunting.