A knowledge of the existence of something we cannot penetrate, of the manifestations of the profoundest reason and the most radiant beauty - it is this knowledge and this emotion that constitute the truly religious attitude; in this sense, and in this alone, I am a deeply religious man.

Except in mathematics, the shortest distance between point A and point B is seldom a straight line. I don't believe in mathematics.

It is true that my parents were worried because I began to speak fairly late, so that they even consulted a doctor. I can't say how old I was - but surely not less than three.

Live with purpose. Don't let people or things around you get you down.

The world is in greater peril from those who tolerate or encourage evil than from those who actually commit it.

I never teach my pupils, I only attempt to provide the conditions in which they can learn.

Political leaders or governments owe their position partly to force and partly to popular election. They cannot be regarded as representative of best elements, morally or intellectually, in their respective nations.