Religious illusion must bow to scientific truth. It is in total error about the nature of the true world. Only science is not an illusion.

But the less a man knows about the past and the present the more insecure must prove to be his judgment of the future.

When a man has once brought himself to accept uncritically all the absurdities that religious doctrines put before him and even to overlook the contradictions between them, we need not be greatly suprised at the weakness of his intellect.

We have long observed that every neurosis has the result, and therefore probably the purpose, of forcing the patient out of real life, of alienating him from actuality.

America is the most grandiose experiment the world has seen, but, I am afraid, it is not going to be a success.

A man like me cannot live without a hobby-horse, a consuming passion - in Schiller's words a tyrant. I have found my tyrant, and in his service I know no limits. My tyrant is psychology. It has always been my distant, beckoning goal and now since I have hit upon the neuroses, it has come so much the nearer.

But one thing about human beings puzzles me the most is their conscious effort to be connected with the object of their affection even if it kills them slowly within.