If human beings could be propagated by cutting, like apple trees, aristocracy would be biologically sound.

A time will however come (as I believe) when physiology will invade and destroy mathematical physics, as the latter has destroyed geometry.

Teleology is like a mistress to a biologist: he cannot live without her but he's unwilling to be seen with her in public.

Until politics are a branch of science, we shall do well to regard political and social reforms as experiments rather than short-cuts to the millennium.

If human beings could be propagated by cutting, like apple trees, aristocracy would be biologically sound.

Shelley and Keats were the last English poets who were at all up to date in their chemical knowledge.

My practise as a scientist is atheistic. That is to say, when I set up an experiment I assume that no god, angel, or devil is going to interfere with its course; and this assumption has been justified by such success as I have achieved in my professional career. I should therefore be intellectually dishonest if I were not also atheistic in the affairs of the world. And I should be a coward if I did not state my theoretical views in public.