Not to converse with a man worthy of conversation is to waste the man. To converse with a man not worthy of conversation is to waste words. The wise waste neither men nor words.
There are those men who say to repay evil with kindness. But I say, how then are we to repay kindness? Repay kindness with kindness, but repay evil with justice.
The young should be dutiful at home, modest abroad, careful and true, overflowing in kindness for all, but in brotherhood with love. And if they have strength to spare they should spend it on the arts.
What you dislike in your superiors, avoid doing to your inferiors. What you dislike in your inferiors, avoid doing when working for your superiors. What you hate in those who are in front of you, do not do to those behind you.