A man when he is making up to anybody can be cordial and gallant and full of little attentions and altogether charming. But when a man is really in love he can't help looking like a sheep.

It often seems to me that's all detective work is, wiping out your false starts and beginning again." Yes, it is very true, that. And it is just what some people will not do. They conceive a certain theory, and everything has to fit into that theory. If one little fact will not fit it, they throw it aside. But it is always the facts that will not fit in that are significant.

Things go entirely differently from the way you planned them.

One is left with the horrible feeling now that war settles nothing; that to win a war is as disastrous as to lose one.

The young people think the old people are fools -- but the old people know the young people are fools.

I do not argue with obstinate men. I act in spite of them.

If anyone is really determined to lend you a book, you never can get out of it!