"Know, first, who you are; and then adorn yourself accordingly."

"The two powers which in my opinion constitute a wise man are those of bearing and forebearing."

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

"Control thy passions, lest they take vengeance on thee."

"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."

"If you hear that everybody is buying a certain stock, ask who is selling."

"Today, the theory of evolution is an accepted fact for everyone but a fundamentalist minority, whose objections are based not on reasoning but on doctrinaire adherence to religious principles."

"Few things are harder to put up with than the annoyance of a good example."

"I believe that the testing of the student's achievements in order to see if he meets some criterion held by the teacher, is directly contrary to the implications of therapy for significant learning."

"Bad mind, bad heart. (Mals Mens, Malus Animus)"

"Everything has been said before, but since nobody listens we have to keep going back and beginning all over again."