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

The conclusion forced upon me in the course of a life devoted to natural science is that the universe as it is assumed to be in physical science is only an idealized world, while the real universe is the spiritual universe in which spiritual values count for everything.

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

Man armed with science is like a baby with a box of matches.

This is my prediction for the future: Whatever hasn't happened will happen, and no one will be safe from it.

And if we must educate our poets and artists in science, we must educate our masters, labour and capital, in art.

Einstein - the greatest Jew since Jesus. I have no doubt that Einstein's name will still be remembered and revered when Lloyd George, Foch and William Hohenzollern share with Charlie Chaplin that ineluctable oblivion which awaits the uncreative mind.