When the world goes mad, one must accept madness as sanity; since sanity is, in the last analysis, nothing but the madness on which the whole world happens to agree.

God's trustiest lieutenants often lack official credentials. They may be professed atheists who are also men of honour and high public spirit.

You are my inspiration and my folly. You are my light across the sea, my million nameless joys, and my day's wage. You are my divinity, my madness, my selfishness, my transfiguration and purification. You are my rapscallionly fellow vagabond, my tempter and star. I want you.

The first condition of progress is the removal of censorship.

Discussing vaccination with a doctor is like discussing vegetarianism with a butcher.

The more ignorant men are, the more convinced are they that their little parish and their little chapel is an apex to which civilization and philosophy has painfully struggled up the pyramid of time from a desert of savagery.

In the arts of life main invents nothing; but in the arts of death he outdoes Nature herself, and produces by chemistry and machinery all the slaughter of plague, pestilence and famine. ... There is nothing in Man's industrial machinery but his greed and sloth: his heart is in his weapons.