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

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

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

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.

The advance of scientific knowledge does not seem to make either our universe or our inner life in it any less mysterious.

Christianity is haunted by the theory of a God with a craving for bloody sacrifices.

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