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

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.

In matters of sexuality we are at present, every one of us, ill or well, nothing but hypocrites.

Opposition is not necessarily enmity; it is merely misused and made an occasion for enmity.

The psychoanalysis of neurotics has taught us to recognize the intimate connection between wetting the bed and the character trait of ambition.

The behavior of a human being in sexual matters is often a prototype for the whole of his other modes of reaction in life.

The price of civilization is instinctual renunciation.