I will give up my belief in evolution if someone finds a fossil rabbit in the Precambrian.

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

An ounce of algebra is worth a ton of verbal argument.

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.

Religion is still parasitic in the interstices of our knowledge which have not yet been filled. Like bed-bugs in the cracks of walls and furniture, miracles lurk in the lacunae of science. The scientist plasters up these cracks in our knowledge; the more militant Rationalist swats the bugs in the open. Both have their proper sphere and they should realize that they are allies.

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

To the biologist the problem of socialism appears largely as a problem of size.