He is a [sane] man who can have tragedy in his heart and comedy in his head.

The modern habit of saying "This is my opinion, but I may be wrong" is entirely irrational. If I say that it may be wrong, I say that is not my opinion. The modern habit of saying "Every man has a different philosophy; this is my philosophy and it suits me" – the habit of saying this is mere weak-mindedness. A cosmic philosophy is not constructed to fit a man; a cosmic philosophy is constructed to fit a cosmos. A man can no more possess a private religion than he can possess a private sun and moon.

Only man can be absurd: for only man can be dignified.

There are arguments for atheism, and they do not depend, and never did depend, upon science. They are arguable enough, as far as they go, upon a general survey of life; only it happens to be a superficial survey of life.

Dipsomaniac and the abstainer are not only both mistaken, but they both make the same mistake. They both regard wine as a drug and not as a drink.

The disadvantage of men not knowing the past is that they do not know the present.

Cruelty is, perhaps, the worst kid of sin. Intellectual cruelty is certainly the worst kind of cruelty.