Coincidences are spiritual puns.

Liberty is the very last idea that seems to occur to anybody, in considering any political or social proposal. It is only necessary for anybody for any reason to allege any evidence of any evil in any human practice, for people instantly to suggest that the practice should be suppressed by the police.

A good novel tells us the truth about its hero; but a bad novel tells us the truth about its author.

Men spoke much in my boyhood about restricted or ruined men of genius: and it was common to say that many a man was a Great Might-Have-Been. To me it's a more solid and startling fact that any man in the street is a Great Might-Not-Have-Been.

I said to him, "Shall I tell you where the men are who believe most in themselves? For I can tell you. I know of men who believe in themselves more colossally than Napoleon or Caesar. I know where flames the fixed star of certainty and success. I can guide you to the thrones of the Super-men. The men who really believe in themselves are all in lunatic asylums.

Latter-day scepticism is fond of calling itself progressive; but scepticism is really reactionary. Scepticism goes back; it attempts to unsettle what has already been settled. Instead of trying to break up new fields with its plough, it simply tries to break up the plough.

All science, even the divine science, is a sublime detective story. Only it is not set to detect why a man is dead; but the darker secret of why he is alive.