Instinct perfected is a faculty of using and even constructing organized instruments; intelligence perfected is the faculty of making and using unorganized instruments.

You will obtain a vision of matter that is perhaps fatiguing for your imagination, but pure and stripped of what the requirements of life make you add to it in external perception.

In laughter we always find an unavowed intention to humiliate and consequently to correct our neighbour.

Laughter is the corrective force which prevents us from becoming cranks.

We regard intelligence as man's main characteristic and we know that there is no superiority which intelligence cannot confer on us, no inferiority for which it cannot compensate.

To perceive means to immobilize. To say this is to say that we seize, in the act of perception, something which outruns perception itself.

Religion is to mysticism what popularization is to science