The inclination to aggression constitutes the greatest impediment to civilization.

Whatever fosters the growth of civilization works at the same time against war.

There are no mistakes.

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.

The poor ego has a still harder time of it; it has to serve three harsh masters, and it has to do its best to reconcile the claims and demands of all three...The three tyrants are the external world, the superego, and the id.

Perception is less of a recording system and more of a protection system against external stimuli.

The first human who hurled an insult instead of a stone was the founder of civilization.