In a good bookroom you feel in some mysterious way that you... - Mark Twain

"Never tell the truth to people who are not worthy of it."

"When I was a boy of 14, my father was so ignorant I could hardly stand to have the old man around. But when I got to be 21, I was astonished at how much the old man had learned in seven years."

"The secret source of humor is not joy but sorrow; there is no humor in Heaven."

"If books are not good company, where shall I find it?"

"Always do what is right. It will gratify half of mankind and astound the other."