Abu Hurairah, may Allah be pleased with him, reported that the Messenger of Allah, may Allah bless and greet him, said:--

"THE STRONG MAN IS NOT THE ONE WHO WRESTLES, BUT THE STRONG MAN IS IN FACT THE
ONE WHO CONTROLS HIMSELF IN A FIT OF RAGE."
[Bukhari, Muslim and Riyad-us-Saliheen].

People are usually impressed by physical power, but real strength is in that person who keeps his/her anger under control when it is aroused. So, be strong from that perspective.