Evolution is the law of policies: Darwin said it, Socrates endorsed it, Cuvier proved it and established it for all time in his paper on The Survival of the Fittest. These are illustrious names, this is a mighty doctrine: nothing can ever remove it from its firm base, nothing dissolve it, but evolution.

I was sorry to have my name mentioned as one of the great authors, because they have a sad habit of dying off. Chaucer is dead, Spencer is dead, so is Milton, so is Shakespeare, and I’m not feeling so well myself.

Against a diseased imagination demonstration goes for nothing.

Irreverence is the champion of liberty and its only sure defense.

It is not worth while to try to keep history from repeating itself, for man's character will always make the preventing of the repetitions impossible.

Damn the subjunctive. It brings all our writers to shame.

The two Testaments are interesting, each in its own way. The Old one gives us a picture of these people's Deity as he was before he got religion, the other one gives us a picture of him as he appeared afterward.