In reality, the past is preserved by itself automatically.

Religion is to mysticism what popularization is to science

I cannot escape the objection that there is no state of mind, however simple, that does not change every moment

Intelligence is the faculty of making artificial objects, especially tools to make tools.

And I also see how this body influences external images: it gives back movement to them.

The major task of the twentieth century will be to explore the unconscious, to investigate the subsoil of the mind.

I see plainly how external images influence the image that I call my body : they transmit movement to it.

It seems that laughter needs an echo.

The motive power of democracy is love