"It is noble to teach oneself, but still nobler to teach others — and less trouble."

"I have found that there ain't no surer way to find out whether you like people or hate them than to travel with them."

"The trouble with the world is not that people know too little, but that they know so many things that aren't so."

"Adam was the only man who, when he said a good thing, knew that nobody had said it before him."

"I had a great deal of trouble with my wife, so I got married again."