For benefits return benefits; for injuries return justice without any admixture of revenge.
To rein a kingdom efficiently it is necessary, before all, to put into good order the family. It's impossible for a man who doesn't know how to lead his own family to know how to lead a country.
It is only the very wisest and the very stupidest who never change.
He who works for his own interests will arouse much animosity
Sincerity is the way of heaven.
If I hold up one corner of a square and the student cannot workout the other three for himself, I won't go any further.