“Silence is one of the hardest arguments to refute".”

“Be like a postage stamp. Stick to one thing until you get there.”

“It's not only the most difficult thing to know one's self, but the most inconvenient.”

“Laughing is the sensation of feeling good all over and showing it principally in one spot.”

“One of the greatest victories you can gain over someone is to beat him at politeness.”

“Consider the postage stamp: its usefulness consists in the ability to stick to one thing till it gets there.”

“Success does not consist in never making blunders, but in never making the same one a second time.”