“Those who are not angry at the things they should be angry at are thought to be fools, and so are those who are not angry in the right way, at the right time, or with the right persons.”

“Anybody can become angry — that is easy, but to be angry with the right person and to the right degree and at the right time and for the right purpose, and in the right way — that is not within everybody's power and is not easy.”

“We praise a man who feels angry on the right grounds and against the right persons and also in the right manner at the right moment and for the right length of time.”

“Those who know, do. Those that understand, teach.”

“All persons ought to endeavor to follow what is right, and not what is established.”

“Those who educate children well are more to be honored than they who produce them; for these only gave them life, those the art of living well.”

“Misfortune shows those who are not really friends.”