Sigmund Freud

In the small matters trust the mind, in the large ones the heart.

The mind is a place which of itself can make a heaven of hell, a hell of heaven.

A civilization which leaves so large a number of its participants unsatisfied and drives them into revolt neither has nor deserves the prospect of a lasting existence.

The death of a parent is the most important event, the most poignant loss, of a man's life.

The repressed always returns.

The unconscious is the true psychical reality; in its innermost nature it is as much unknown to us as the reality of the external world, and it is as incompletely presented by the data of consciousness as is the external world by the communications of our sense organs.

What progress we are making. In the Middle Ages they would have burned me. Now they are content with burning my books.

A fear of weapons is a sign of retarded sexual and emotional maturity.

No, our science is no illusion. But an illusion it would be to suppose that what science cannot give us we can get elsewhere.