“The philosophies of one age have become the absurdities of the next, and the foolishness of yesterday has become the wisdom of tomorrow.”

“Shut out all of your past except that which will help you weather your tomorrows.”

“One special advantage of the skeptical attitude of mind is that a man is never vexed to find that after all he has been in the wrong.”

“Ask not what disease the person has, but rather what person the disease has”

“He who studies medicine without books sails an uncharted sea, but he who studies medicine without patients does not go to sea at all”

“Think not of the amount to be accomplished, the difficulties to be overcome, or the end to be attained, but set earnestly, at the little task at your elbow, letting that be sufficient for the day.”

“In seeking absolute truth we aim at the unattainable and must be content with broken portions. ”