Train people well enough so they can leave, treat them well enough so they don't want to.
有人说:“如果用恩德来回报别人对自己的怨仇,行不行呢?”孔子说:“这样的话,你将用什么来报答别人对你的恩德呢?不如以公正对待怨仇,以恩德报答恩德。”
"Every saint has a past, and every sinner has a future."