In mourning it is the world which has become poor and empty; in melancholia it is the ego itself.

Once again, only religion can answer the question of the purpose of life. One can hardly be wrong in concluding that the idea of life having a purpose stands and falls with the religious system.

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.

These [religious ideas] are given out as teachings, are not precipitates of experience or end-results of thinking: they are illusions, fullfilments of the oldest, strongest and most urgent wishes of mankind.

A certain degree of neurosis is of inestimable value as a drive, especially to a psychologist.

If it's not one thing, it's your mother.

By abolishing private property one deprives the human love of aggression.