When the intensity of emotional conviction subsides, a man who is in the habit of reasoning will search for logical grounds in favour of the belief which he finds in himself.

Power is sweet; it is a drug, the desire for which increases with a habit.

It is permissible with certain precautions to speak in print of coitus, but it is not permissible to employ the monosyllabic synonym for this word.

If we compare Europe with other continents, it is marked out as [another] persecuting continent.

One of the chief triumphs of modern mathematics consists in having discovered what mathematics really is.

You may reasonably expect a man to walk a tightrope safely for ten minutes; it would be unreasonable to do so without accident for two hundred years.

Mathematics is, I believe, the chief source of the belief in eternal and exact truth, as well as a sensible intelligible world.