When it is said that an object occupies a large space in the soul or even that it fills it entirely, we ought to understand by this simply that its image has altered the shade of a thousand perceptions or memories, and that in this sense it pervades them, although it does not itself come into view.

Only those ideas that are least truly ours can be adequately expressed in words.

To exist is to change, to change is to mature, to mature is to go on creating oneself endlessly.

Intelligence is characterized by a natural incomprehension of life.

It seems that laughter needs an echo.

There is nothing in philosophy which could not be said in everyday language.

Europe is overpopulated, the world will soon be in the same condition, and if the self-reproduction of man is not rationalized... we shall have war.