Keep this thought handy when you feel a fit of rage coming on–it isn’t manly to be enraged. Rather, gentleness and civility are more human, and therefore manlier. A real man 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.
Anger is not impressive or tough–it’s a mistake. It’s weakness.
Strength is the ability to maintain a hold of oneself. It’s being the person who never gets mad, who cannot be rattled, because they are in control of their passions–rather than controlled by their passions.
– The Daily Stoic pg 41