In Meditations 11.18, feeling anger stir, Marcus Aurelius doesn't suppress it or reason it away in the abstract. He reaches for a list (nine reflections from the Muses, and a tenth from Apollo himself) and works through it deliberately. Robertson surfaces this passage as a core Stoic self-therapy toolkit.
Seneca passed on an old saying: anger is "a brief madness." What follows is Marcus working his way back out of it.