Sexuality is the key to the problem of the psychoneuroses and of the neuroses in general. No one who disdains the key will ever be able to unlock the door.

Maturity is the ability to postpone gratification.

The ego is not master in its own house.

A state of consciousness is characteristically very transitory; an idea that is conscious now is no longer so a moment later, although it can become so again under certain conditions that are easily brought about.

Beauty has no obvious use; nor is there any clear cultural necessity for it. Yet civilization could not do without it.

I had thought about cocaine in a kind of day-dream.

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