I remain convinced that obstinate addiction to ordinary language in our private thoughts is one of the main obstacles to progress in philosophy.

All serious innovation is only rendered possible by some accident enabling unpopular persons to survive.

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.

Truth is for the gods; from our human point of view, it is an ideal, towards which we can approximate, but which we cannot hope to reach.

This, however, is a passing nightmare; in time the earth will become again incapable of supporting life, and peace will return.

It seems to be the fate of idealists to obtain what they have struggled for in a form which destroys their ideals.

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.