Recompense injury with justice, and recompense kindness with kindness.
Can there be a love which does not make demands on its object?
There has never been a man mean and at the same time virtuous.
If a man keeps cherishing his old knowledge so as continually to be acquiring new, he may be a teacher of others.
Base yourself in loyalty and trust. Don't be companion with those who are not your moral equal. When you make a mistake, don't hesitate to correct it.
The superior man is firm in the right way and not merely firm.