Probably no invention came more easily to man than heaven.

The great trick of regarding small departures from the truth as the truth itself - on which is founded the entire integral calculus - is also the basis of our witty speculations, where the whole thing would often collapse if we considered the departures with philosophical rigour.

In each of us there is a little of all of us.

The most perfect ape cannot draw an ape; only man can do that; but, likewise, only man regards the ability to do this as a sign of superiority.

Affectation is a very good word when someone does not wish to confess to what he would none the less like to believe of himself.

The Greeks possessed a knowledge of human nature we seem hardly able to attain to without passing through the strengthening hibernation of a new barbarism.

I believe that man is in the last resort so free a being that his right to be what he believes himself to be cannot be contested.