When an old truth ceases to be applicable, it does not become any truer by being stood on its head.

Conscience is the anticipation of the fellow who awaits you if and when you come home.

We are free to change the world and start something new in it.

in addition to the conditions under which life is given to man on earth, and partly out of them, men constantly create their own, self-made conditions, which, their human origins notwithstanding, possess the same conditioning power as natural things. whatever touches or enters into a sustained relationship with human life immediately assumes the character of a condition of human existence. this is why men, no matter what they do, are always conditioned beings. whatever enters the human world of its own accord or is drawn into it by human effort becomes part of the human condition.

Mathematics, the non-empirical science par excellence . . . the science of sciences, delivering the key to those laws of nature and the universe which are concealed by appearances.

This inability to think created the possibility for many ordinary men to commit evil deeds on a gigantic scale, the like of which had never been seen before. The manifestation of the wind of thought is not knowledge but the ability to tell right from wrong, beautiful from ugly. And I hope that thinking gives people the strength to prevent catastrophes in these rare moments when the chips are down.

The extreme form of power is All against One, the extreme form of violence is One against All.