I regard sex as the central problem of life. And now that the problem of religion has practically been settled, and that the problem of labor has at least been placed on a practical foundation, the question of sex—with the racial questions that rest on it—stands before the coming generations as the chief problem for solution. Sex lies at the root of life, and we can never learn to reverence life until we know how to understand sex.

All progress in literary style lies in the heroic resolve to cast aside accretions and exuberances, all the conventions of a past age that were once beautiful because alive and are now false because dead.

The Promised Land always lies on the other side of a Wilderness.

Man lives by imagination.

Einstein is notmerely an artist in his moments of leisure and play, as a great statesman may play golf or a great soldier grow orchids. He retains the same attitude in the whole of his work. He traces science to its roots in emotion, which is exactly where art is also rooted.

We cannot be sure that we ought not to regard the most criminal country as that which in some aspects possesses the highest civilization.

Pain and death are part of life. To reject them is to reject life itself.