Every really new idea looks crazy at first.

The merely well-informed man is the most useless bore on God's earth.

Every organism requires an environment of friends, partly to shield it from violent changes, and partly to supply it with its wants.

Art flourishes where there is a sense of adventure.

The vigour of civilised societies is preserved by the widespread sense that high aims are worth while. Vigorous societies harbour a certain extravagance of objectives, so that men wander beyond the safe provision of personal gratifications. All strong interests easily become impersonal, the love of a good job well done. There is a sense of harmony about such an accomplishment, the Peace brought by something worth while. Such personal gratification arises from aim beyond personality.

It is a safe rule to apply that, when a mathematical or philosophical author writes with a misty profundity, he is talking nonsense.

Error is the price we pay for progress.