In the development of mankind as a whole, just as in individuals, love alone acts as the civilizing factor in the sense that it brings a change from egoism to altruism.

Neither in my private life nor in my writings, have I ever made a secret of being an out-and-out unbeliever.

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

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

Love and work are the cornerstones of our humanness.

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.

The only shame in masturbation is the shame of not doing it well.