One is apt to overestimate beauty when it is rare

An American has not seen the United States until he has seen Mardi-Gras in New Orleans.

When I take up one of Jane Austen's books ... I feel like a barkeep entering the kingdom of heaven. I know what his sensation would be and his private comments. He would not find the place to his taste, and he would probably say so.

When in doubt, tell the truth. That maxim I did invent, but never expected it to be applied to me. I did say, "When you are in doubt," but when I am in doubt myself I use more sagacity.

There is nothing training can't cannot do. Nothing is above its reach.

What is there in Rome for me to see that others have not seen before me? What is there for me to touch that others have not touched? What is there for me to feel, to learn, to hear, to know, that shall thrill me before it pass to others? What can I discover?--Nothing. Nothing whatsoever. One charm of travel dies here.

I came in with Halley's Comet in 1835. It is coming again next year, and I expect to go out with it. It will be the greatest disappointment of my life if I don't go out with Halley's Comet. The Almighty has said, no doubt: "Now here are these two unaccountable freaks; they came in together, they must go out together.