Whether our work is art or science or the daily work of society, it is only the form in which we explore our experience which is different.

Sex was invented as a biological instrument by (say) the green algae. But as an instrument in the ascent of man which is basic to his cultural evolution, it was invented by man himself.

Fifty years from now if an understanding of man's origins, his evolution, his history, his progress is not in the common place of the school books we shall not exist.

We gain our ends only with the laws of nature; we control her only by understanding her laws.

The symbol and the metaphor are as necessary to science as to poetry.

By the worldly standards of public life, all scholars in their work are of course oddly virtuous. They do not make wild claims, they do not cheat, they do not try to persuade at any cost, they appeal neither to prejudice nor to authority, they are often frank about their ignorance, their disputes are fairly decorous, they do not confuse what is being argued with race, politics, sex or age, they listen patiently to the young and to the old who both know everything. These are the general virtues of scholarship, and they are peculiarly the virtues of science.

The world today is made, it is powered by science; and for any man to abdicate an interest in science is to walk with open eyes towards slavery.