Logic must no more admit a unicorn than zoology can.

Too little liberty brings stagnation, and too much brings chaos.

There is something feeble and a little contemptible about a man who cannot face the perils of life without the help of comfortable myths.

If the West can claim superiority in anything, it is . . . in science and scientific technique.

Love as a relation between men and women was ruined by the desire to make sure of the legitimacy of children.

To be out of harmony with one's surroundings is of course a misfortune, but it is not always a misfortune to be avoided at all costs. Where the environment is stupid or prejudiced or cruel, it is a sign of merit to be out of harmony with it.

Descartes, the father of modern philosophy ... would never-so he assures us-have been led to construct his philosophy if he had had only one teacher, for then he would have believed what he had been told; but, finding that his professors disagreed with each other, he was forced to conclude that no existing doctrine was certain.