The Prophet peace and blessings of Allah be upon him asked his companions, who do you consider the strongest person from amongst you? And they replied, the one that cannot be defeated. The Prophet peace and blessings of Allah be upon him said, no it is the one who controls himself when he is angry.
The Messenger sal Allahu alayhi wa sallam said, Three things destroy a person: Avarice that is obeyed, passion when it is followed, and admiration of a man for himself.
Brave is the lion tamer, brave is the world subduer, but braver is the one who has subdued himself.
– Johann Gottfried von Herder