Inferences of Science and Common Sense differ from those of deductive logic and mathematics in a very important respect, namely, when the premises are true and the reasoning correct, the conclusion is only probable.

War...seems a mere madness, a collective insanity.

The average man's opinions are much less foolish than they would be if he thought for himself.

The taboo against nakedness is an obstacle to a decent attitude on the subject of sex.

We need a science to save us from science.

You must believe that you can help bring about a better world. A good society is produced only by good individuals, just as truly as a majority in a presidential election is produced by the votes of single electors.

The greatest challenge to any thinker is stating the problem in a way that will allow a solution.