The genitals themselves have not undergone the development of the rest of the human form in the direction of beauty.

Loneliness and darkness have just robbed me of my valuables.

dream is the dreamer's own psychical act.

The whole life of instinct serves the one end of bringing about death.

I was making frequent use of cocaine at that time ... I had been the first to recommend the use of cocaine, in 1885, and this recommendation had brought serious reproaches down on me.

Religious ideas have sprung from the same need as all the other achievements of culture: from the necessity for defending itself against the crushing supremacy of nature.

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.