Just as no one can be forced into belief, so no one can be forced into unbelief.

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

There is to my mind no doubt that the concept of beautiful had its roots in sexual excitation and that its original meaning was sexually stimulating.

A strong egoism is a protection against disease, but in the last resort we must begin to love in order that we may not fall ill, and must fall ill if, in consequence of frustration, we cannot love.

The transformation of object-libido into narcissistic libido which thus takes place obviously implies an abandonment of sexual aims, a desexualization - a kind of sublimation, therefore.

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.

Not to know the past is to be in bondage to it, while to remember, to know, is to be set free.