The sloth lives his life upside down. He is perfectly comfortable that way. If the blood rushes to his head, nothing happens because there is nothing to work on.

We all make mistakes, but intelligence enables us to do it on purpose.

I'm a poetry-skipper myself. I don't like to boast, but I have probably skipped more poetry than any other person of my age and weight in this country - make it any other two persons. This doesn't mean that I hate poetry. I don't feel that strongly about it. It only means that those who wish to communicate with me by means of the written word must do so in prose.

I do not travel. I am not much of an extrovert, and I'm not much interested in extroverted objects. I do not care for the 'ideas' of novelists. Novels are wonderful, of course, but I prefer newspapers.

The Earthworm plows the whole world with his tunnels, drains and aerates the earth… If you ever buy any land, be sure it has plenty of Earthworms toiling and moiling all day so that you can sit down and relax.

Etiquette means behaving yourself a little better than is absolutely essential.

As Darwin puts it in The Descent of Man, 'Male snakes, though appearing so sluggish, are amorous.' Isn't that just like Darwin? It was one of his main ideas, you know, that the males of almost all animals have stronger passions than the females. Since then we've learned a thing or two. At any rate, the female snake is right there when spring arrives in the woods.