The real wisdom here isn't the obvious warning about revenge's cost—it's Confucius identifying *intention* as a form of self-harm. You don't need to act on anger for it to consume you; the moment you begin planning revenge, you've already divided yourself, turning half your mind into a tool of destruction. A person nursing a grudge against a former colleague discovers that imagining confrontations during their commute, drafting pointed emails they'll never send, costs them far more energy than it costs the other person—and the other person may not even notice. What Confucius understood is that revenge isn't primarily dangerous because it escalates; it's dangerous because wanting it poisons the wanting.