"Charity begins at home."

"What is done let us leave alone."

"Moderation in all things."

"I bid him look into the lives of men as though into a mirror, and from others to take an example for himself."

"In fact, nothing is said that has not been said before."

"Fortune helps the brave."

"Judge of a man by his questions rather than by his answers."

"A wise man's question contains half the answer."

"If you ask too many questions, you will find no answers, only more questions."

"There are two sides to every question."

"A thinker sees his own actions as experiments and questions--as attempts to find out something. Success and failure are for him answers above all."

"The outcome of any serious research can only be to make two questions grow where only one grew before."