Intolerance of groups is often, strangely enough, exhibited more strongly against small differences than against fundamental ones.

A love that does not discriminate seems to me to forfeit a part of its own value, by doing an injustice to its object; and secondly, not all men are worthy of love.

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.

Writing was in its origin, the voice of an absent person.

But the repressed merges into the id as well, and is merely a part of it. The repressed is only cut off sharply from the ego by the resistances of repression; it can communicate with the ego through the id.

It is impossible to overlook the extent to which civilization is built upon a renunciation of instinct.

The psychoanalysis of neurotics has taught us to recognize the intimate connection between wetting the bed and the character trait of ambition.