In a country of such recent civilization as ours, whose almost limitless treasures of material wealth invite the risks of capital and the industry of labor, it is but natural that material interests should absorb the attention of the people to a degree elsewhere unknown.

War is not the continuation of politics with different means, it is the greatest mass-crime perpetrated on the community of man.

What is courage? Courage is the willingness to risk failure...There is only one danger I find in life, and that, indeed, is a real one. You may take too many precautions.

The test of one's behavior pattern is their relationship to society, relationship to work and relationship to sex.

My difficulties belong to me!

Mathematics is pure language - the language of science. It is unique among languages in its ability to provide precise expression for every thought or concept that can be formulated in its terms.

All failures - neurotics, psychotics, criminals, drunkards, problem children, suicides, perverts, and prostitutes - are failures because they are lacking in social interest