“When I was a boy of fourteen, my father was so ignorant I could hardly stand to have the old man around. But when I got to be twenty-one, I was astonished at how much the old man had learned in seven years.”

“A truth is not hard to kill, a lie told well is immortal.”

“I have found that there is no surer way to find out whether you like people or hate them than to travel with them.”

“Concerning the difference between man and the jackass, some observers hold that there isn't any.”

“Better a broken promise than none at all.”

“The lack of money is the root of all evil.”