Aristotle and Plato considered Greeks so innately superior to barbarians that slavery is justified so long as the master is Greek and the slave barbarian.

Many a marriage hardly differs from prostitution, except being harder to escape from.

The pure mathematician, like the musician, is a free creator of his world of ordered beauty.

We have almost reached the point where praise of rationality is held to mark a man as an old fogey regrettably surviving from a bygone age.

In a Balkan country, not so many years ago, a party which had been beaten by a narrow margin in a general election retrieved its fortunes by shooting a sufficient number of the representatives of the other side to give it a majority. . . . Cromwell and Robespierre . . . acted likewise.

The moral thing I should wish to say to them is very simple; I should say: "Love is wise - Hatred is foolish." In this world, which is getting more and more closely interconnected, we have to learn to tolerate each other.

Half the useful work in the world consists of combating the harmful work.