We may say that hysteria is a caricature of an artistic creation, a compulsion neurosis a caricature of a religion, and a paranoiac delusion a caricature of a philosophic system.

I consider it a good rule for letter-writing to leave unmentioned what the recipient already knows, and instead tell him something new.

I have an infamously low capacity for visualizing relationships, which made the study of geometry and all subjects derived from it impossible for me.

Religion originates in the child's and young mankind's fears and need for help. It cannot be otherwise.

The moment a man questions the meaning and value of life, he is sick, since objectively neither has any existence; by asking this question one is merely admitting to a store of unsatisfied libido to which something else must have happened, a kind of fermentation leading to sadness and depression.

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

One is very crazy when in love.