Most intellectual people do not believe in God, but they fear him just the same.

The fact that political ideologies are tangible realities is not a proof of their vitally necessary character. The bubonic plague was an extraordinarily powerful social reality, but no one would have regarded it as vitally necessary.

We shall no longer hang on to the tails of public opinion or to a non- existent authority on matters utterly unknown and strange. We shall gradually become experts ourselves in the mastery of the knowledge of the Future.

Make it plain that you have no time for war, that you have more important things to do....let the diplomats and marshals of the earth shoot each other.

Scientific theory is a contrived foothold in the chaos of living phenomena.

Man's right to know, to learn, to inquire, to make bona fide errors, to investigate human emotions must, by all means, be safe, if the word "freedom" should ever be more than an empty political slogan.

You think the end justifies the means, however vile. I tell you: the end is the means by which you achieve it. Today's step is tomorrow's life. Great ends cannot be attained by base means. You've proved that in all your social upheavals. The meanness and inhumanity of the means make you mean and inhuman and make the end unattainable.