"Imitation is the sincerest of flattery."

"True friendship is like sound health, the value is seldom appreciated until it is lost."

"If you would be known, and not know, vegetate in a village; If you would know, and not be known, live in a city."

"To know the pains of power, we must go to those who have it; to know its pleasures, we must go to those who are seeking it."

"Many books require no thought from those who read them, and for a very simple reason; they made no such demand upon those who wrote them."

"Examinations are formidable even to the best prepared, for the greatest fool may ask more than the wisest man can answer."

"One is tempted to define man as a rational animal who always loses his temper when he is called upon to act in accordance with the dictates of reason."

"There is danger in both belief and unbelief."

"Americans are a free people, who know that freedom is the right of every person and the future of every nation. The liberty we prize is not America's gift to the world; it is God's gift to humanity."

"God runs electromagnetics by wave theory on Monday, Wednesday, and Friday, and the Devil runs them by quantum theory on Tuesday, Thursday, and Saturday."

"I live for books."

"I pride myself on the fact that my work has no socially redeeming value."