Man has, as it were, become a kind of prosthetic God. When he puts on all his auxiliary organs, he is truly magnificent but those organs have not grown on him and they still give him much trouble at times.

Being entirely honest with oneself is a good exercise.

I have found little that is 'good' about human beings on the whole. In my experience most of them are trash, no matter whether they publicly subscribe to this or that ethical doctrine or to none at all. That is something that you cannot say aloud, or perhaps even think.

The great question that has never been answered, and which I have not yet been able to answer, despite my thirty years of research into the feminine soul, is 'What does a woman want?'

The conscious mind may be compared to a fountain playing in the sun and falling back into the great subterranean pool of subconscious from which it rises.

What we call happiness in the strictest sense comes from the (preferably sudden) satisfaction of needs which have been dammed up to a high degree.

Just as a cautious businessman avoids investing all his capital in one concern, so wisdom would probably admonish us also not to anticipate all our happiness from one quarter alone.

Analogies, it is true, decide nothing, but they can make one feel more at home.

What a distressing contrast there is between the radiant intelligence of the child and the feeble mentality of the average adult.

The voice of the intellect is a soft one, but it does not rest until it has gained a hearing.