The religions of mankind must be classed among the mass-delusions of this kind. No one, needless to say, who shares a delusion ever recognizes it as such.

The doctor should be opaque to his patients and, like a mirror, should show them nothing but what is shown to him.

The voice of the intellect is a soft one, but it does not rest until it has gained a hearing.

After all, we did not invent symbolism; it is a universal age-old activity of the human imagination.

Demons do not exist any more than gods do, being only the products of the psychic activity of man.

The wish to be able to fly is to be understood as nothing else than a longing to be capable of sexual performance.

The voice of the intellect is soft one, but it does not rest until it has gained a hearing. Ultimately, after endless rebuffs, it succeeds. This is one of the few points in which one may be optimistic about the future of mankind.