To accept it without arrogance, to let it go with indifference. (Hays translation) - Marcus Aurelius

How much more damage anger and grief do than the things that cause them. (Hays translation)

Keep this thought handy when you feel a bit of rage coming on – it isn't manly to be enraged. Rather, gentleness and civility are more human, and therefore manlier. A real person doesn't give way to anger and discontent, and such a person has strength, courage, and endurance – unlike the angry and complaining. The nearer a man comes to a calm mind, the closer he is to strength.

Objective judgment, now, at this very moment. Unselfish action, now, at this very moment. Willing acceptance—now, at this very moment—of all external events. That's all you need. (Hays translation)