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

I have never yet met a healthy person who worried very much about his health, or a really good person who worried much about his own soul.

There can be no truce between science and religion.

If materialism is true, it seems to me that we cannot know that it is true. If my opinions are the result of the chemical processes going on in my brain, they are determined by the laws of chemistry, not those of logic.

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

We must learn not to take traditional morals too seriously. And it is just because even the least dogmatic of religions tends to associate itself with some kind of unalterable moral tradition, that there can be no truce between science and religion.

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.