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

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

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.

It is with our entire past ... that we desire, will and act ... from this survival of the past it follows that consciousness cannot go through the same state twice. The circumstances may still be the same, but they will act no longer on the same person ... that is why our duration is irreversible.

Genius is that which forces the inertia of humanity to learn.

There are manifold tones of mental life, or, in other words, our psychic life may be lived at different heights, now nearer to action, now further removed from it, according to the degree of our attention to life.

Homo sapiens, the only creature endowed with reason, is also the only creature to pin its existence on things unreasonable.