As men begin to grow civilized, they cease to be satisfied with mere taboos.

For love of domination we must substitute equality; for love of victory we must substitute justice; for brutality we must substitute intelligence; for competition we must substitute cooperation. We must learn to think of the human race as one family.

We shall say that we have acquaintance with anything of which we are directly aware, without the intermediary of any process of inference of any knowledge of truths.

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 most essential characteristic of scientific technique is that it proceeds from experiment, not from tradition. The experimental habit of mind is a difficult one for most people to maintain; indeed, the science of one generation has already become the tradition of the next

It is only through imagination that men become aware of what the world might be; without it, ‘progress’ would become mechanical and trivial.

To be happy in this world, especially when youth is past, it is necessary to feel oneself not merely an isolated individual whose day will soon be over, but part of the stream of life flowing on from the first germ to the remote and unknown future.