Words of Wisdom II - Hagakure: Book of the Samurai

When intimate friends, allies, or people who are indebted to you have done some wrong, you should secretly reprimand them and intervene between them and society in a good manner. You should erase a person's bad reputation and praise him as a matchless ally and one man in a thousand. If you wilt thus reprimand a person in private and with good understanding, his blemish will heal and he will become good. If you praise a person, people's hearts will change and an ill reputation will go away of itself. It is important to have the single purpose of handling all things with compassion and doing things well.