"When in doubt, tell the truth."

"My books are like water; those of the great geniuses are wine. (Fortunately everybody drinks water.)"

"I have found that the best way to give advice to your children is to find out what they want and then advise them to do it."

"It is discouraging to try to penetrate a mind like yours. You ought to get it thoroughly fumigated, and then put in a new lot of furniture."

"Why shouldn't I be an optimist? I have nothing to lose."