[The Bible is] a mass of fables and traditions, mere mythology.

Giving up smoking is the easiest thing in the world. I know because I've done it thousands of times.

Our most valuable and most instructive materials in the history of man are treasured up in India.

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.

You can't no more teach what you ain't learned than you can come from where you ain't been.

That is just the way with some people. They get down on a thing when they don’t know nothing about it.

It is impossible that a genius - at least a literary genius - can ever be discovered by his intimates; they are so close to him that he is out of focus to them and they can't get at his proportions; they can't perceive that there is any considerable difference between his bulk and their own.