All these constructions and the laws connecting them can be arrived at by the principle of looking for the mathematically simplest concepts and the link between them.

One of the strongest motives that lead men to art and science is escape from everyday life with its painful crudity and hopeless dreariness, from the fetters of one's own ever-shifting desires. A finely tempered nature longs to escape from the personal life into the world of objective perception and thought.

Blind belief in authority is the greatest enemy of truth.

Man usually avoids attributing cleverness to somebody else unless it is an enemy.

It gives me great pleasure indeed to see the stubbornness of an incorrigible nonconformist warmly acclaimed.

The bigotry of the nonbeliever is for me nearly as funny as the bigotry of the believer.

When men are engaged in war and conquest, the tools of science become as dangerous as a razor in the hands of a child of three. We must not condemn man because his inventiveness and patient conquest of the forces of nature are being exploited for false and destructive purposes. Rather, we should remember that the fate of mankind hinges entirely upon man’s moral development.