Man has, as it were, become a kind of prosthetic God.

The functional importance of the ego is manifested in the fact that normally control over the approaches to motility devolves upon it. Thus in its relation to the id it is like a man on horse back, who has to hold in check the superior strength of the horse; with this difference, that the rider tries to do so with his own strength while the ego uses borrowed forces.

The only unnatural sexual behavior is none at all.

I do not think our successes can compete with those of Lourdes. There are so many more people who believe in the miracles of the Blessed Virgin than in the existence of the unconscious.

Nature delights in making use of the same forms in the most various biological connections: as it does, for instance, in the appearance of branch-like structures both in coral and in plants, and indeed in some forms of crystal and in certain chemical precipitates.

Most people do not really want freedom, because freedom involves responsibility, and most people are frightened of responsibility.

all the categories which we employ to describe conscious mental acts, such as ideas, purposes, resolutions, and so on, can be applied tothese latent states.