To keep him close to the heart without corrupting himself, I would be somewhere from time to time and let him watch people from a distance, so that he could see the scene with his own eyes, but he didn't have to intervene.Now is the time to study history.With the help of history, he can read people's hearts without studying philosophy.With the help of history, he can just be a spectator, calm and unbiased, and act as a judge of historical figures without becoming their accomplice or victim.