Scientists have odious manners, except when you prop up their theory; then you can borrow money off them.

A pilot must have a memory developed to absolute perfection. But there are two higher qualities which he also must have. He must have good and quick judgment and decision, and a cool, calm courage that no peril can shake.

Knowledge becomes wisdom only after it has been put to good use.

You may have noticed that the less I know about a subject the more confidence I have, and the more new light I throw on it.

There is a sumptuous variety about the New England weather... In the spring I have counted one hundred and twenty-six different kinds of weather inside of four and twenty hours.

His ignorance covers the world like a blanket, and there's scarcely a hole in it anywhere.

You may call a jay a bird. Well, so he is, in a measure--because he's got feathers on him, and don't belong to no church, perhaps;but otherwise he is just as much a human as you be. And I'll tell you for why. A jay's gifts and instincts, and feelings, and interests, cover the whole ground. A jay hasn't got any more principle than a Congressman.