ليس الشديد بالصرعة؛ إنما الشديد الذي يملك نفسه عند الغضب
The strong person is not the good wrestler. Rather,the strong person is the one who controls himself when he is angry.
(Sahih al-Bukhari, Book 73, #135) ↗
Mohammed was not an apparent failure. He was a dazzling success, politically as well as spiritually, and Islam went from strength to strength to strength. ↗