Speech, after all, is in some measure an expression of character, and flexibility in its use is a good way to tell your friends from the robots.

[T]hat is the triumph of history - truth absolute is not at hand; the original with which to match the copy does not exist.

To denounce does not free the self from what it hates, any more than ignoring the past shuts off its influence.

I have always been - I think any student of history almost inevitably is - a cheerful pessimist.

Out of man's mind in free play comes the creation Science. It renews itself, like the generations, thanks to an activity which is the best game of homo ludens: science is in the strictest and best sense a glorious entertainment.

Intellect has nothing to do with equality except to respect it as a sublime convention.

Time and rest are needed for absorption. Psychologists confirm that it is really in the summer that our muscles learn to skate and in the winter, how to swim.