A man does not know what he is saying until he knows what he is not saying.

Humour is meant, in a literal sense, to make game of man; that is, to dethrone him from his official dignity and hunt him like game.

I am at one with my duality.

Man must have just enough faith in himself to have adventures, and just enough doubt of himself to enjoy them.

If our caricaturists do not hate their enemies, it is not because they are too big to hate them, but because their enemies are not big enough to hate.

There is no great harm in the theorist who makes up a new theory to fit a new event. But the theorist who starts with a false theory and then sees everything as making it come true is the most dangerous enemy of human reason.

Anyone who is not an anarchist agrees with having a policeman at the corner of the street; but the danger at present is that of finding the policeman half-way down the chimney or even under the bed.