"We have two ears and one mouth so we may listen more and talk the less."

"If you want to improve, be content to be thought foolish and stupid."

"A wise man is he who does not grieve for the thing which he has not, but rejoices for those which he has."

"What is the first business of one who practices philosophy? To get rid of self-conceit. For it is impossible for anyone to begin to learn that which he thinks he already knows."

"First learn the meaning of what you say, and then speak."

"Only the educated are free."

"You may assume infinite ignorance and unlimited intelligence."

"When I came back to Dublin I was courtmartialed in my absence and sentenced to death in my absence, so I said they could shoot me in my absence."

"People seldom become famous for what they say until after they are famous for what they've done."

"What's up, Doc?"

"Somebody who thinks logically is a nice contrast to the real world"

"Praise will come to those whose kindness leaves you without debt."