To believe is very dull. To doubt is intensely engrossing. To be on the alert is to live, to be lulled into security is to die.

Dullness is the coming of age of seriousness.

I now see that sorrow, being the supreme emotion of which man is capable, is at once the type and test of all great art.

Always borrow money from a pessimist. He won't expect it back.

The worst vice of the fanatic is his sincerity.

What is the good of friendship if one cannot say exactly what one means?

The only way a woman can ever reform a man is by boring him so completely that he loses all possible interest in life.