(Correspondence of Hazrat Mufti Mahmood Hasan Gangohi rahimahullah)

Letter:  I have a lot of anger in me. At times if a student does not carry out the work given to him, I become very angry. My nafs (innerself) pacifies me that I am doing this for the reformation of the student. Sometimes when angry, I focus on my own faults and weaknesses, yet my anger does not subside.

Reply:  At the time of anger when the thought comes to mind that you are angry for the reformation of the student, then ponder over the following:

Hadhrat Anas (radiyallahu anhu) served Nabi (sallallahu alaihi wasallam) for almost ten years. He says: “At times Nabi (sallallahu alaihi wasallam) instructed me to do some work but I would reply that I will not do it.
 Sometimes Nabi (sallallahu alaihi wasallam) would send me to do some work but I would get involved in some play and amusement. Nabi (sallallahu alaihi wasallam) would wait and then come looking for me. He would find me sleeping in some place. He would wake me up and dust off whatever sand may have settled on me. He never ever said, “Why did you do this?” or “Why did you not do that?” Never did he ever say “Oof” as well.”
Thus we should follow the way of Nabi (sallallahu alaihi wasallam). After all Nabi (sallallahu alaihi wasallam) most definitely had in mind the reformation of Hadhrat Anas (radiyallahu anhu). (Maktoobaat vol. 5, pg. 31)