For benefits return benefits; for injuries return justice without any admixture of revenge.

When we see persons of worth, we should think of equaling them; when we see persons of a contrary character, we should turn inwards and examine ourselves.

Let our reason, and not our senses, be the rule of our conduct; for reason will teach us to think wisely, to speak prudently, and to behave worthily.

See a person's means ... Observe his motives. Examine that in which he rests. How can a person conceal his character?

Have no friends not equal to yourself.

These are the four abuses: desire to succeed in order to make oneself famous; taking credit for the labors of others; refusal to correct one's errors despite advice; refusal to change one's ideas despite warnings.

Heaven sends down its good and evil symbols and wise men act accordingly.