Friendship with the upright, with the truthful and with the well informed is beneficial. Friendship with those who flatter, with those who are meek and who compromise with principles, and with those who talk cleverly is harmful.
Every piece of marble has a statue in it waiting to be released by a person of sufficient skill to chip away the unnecessary parts. Just as the sculptor is to the marble, so is education to the soul. It releases it. For only educated people are free people. You cannot create a statue by smashing the marble with a hammer, and you cannot by the force of arms release the spirit or the soul of people.
On matters beyond his ken a gentleman speaks with caution. If names are not right, words are misused. When words are misused, affairs go wrong. When affairs go wrong, courtesy and music droop, law and justice fail. And when law and justice fail them, a people can move neither hand nor foot. So a gentleman must be ready to put names in speech, to put words into deeds. A gentleman is nowise careless of words.
The Master said, If out of the three hundred songs I had to take one phrase to cover all my teachings, I would say 'Let there be no evil in your thoughts.'