Shaykh ‘Abdullah ‘Azzam
Hasan al-Banna - may Allah have Mercy upon him - said: “We used to follow this way of commanding the good and forbidding the evil. We had a shaykh who used to teach us and guide us, so, one day, I saw him praying between the pillars of the mosque. So, I wanted to advise him that praying between the pillars of the mosque is disliked (makruh). So, I wrote him a letter, and addressed it on behalf of ‘A Doer of Good,’ saying: “O Shaykh, I saw you praying between the pillars of the mosque, and this is disliked, as the Prophet said.” I then signed it ‘A Doer of Good,’ and sent it to him by mail. He got the letter and read it, then he said: “O youth! I have received a letter from a man who advised me not to pray between the pillars of the mosque, and I did not previously know that this is disliked, so, don’t do it.”"
Hasan al-Banna added: “I was amongst the youth that he was addressing. So, we were able to fulfill a good action without causing any insult or offense to our teacher….”
Therefore, commanding the good and forbidding the evil requires a person who loves the people; a person who looks at the bigger picture; a person with a gentle tongue. Do not come to one and say: ‘I hate you for the sake of Allah because you do this or that.’ Are you not able to say, instead: ‘I love you for the sake of Allah, my brother! However, I saw a simple and small mistake from you.’
By Allah, a brother described to me the following: “Someone came up to me and said: “I hate you for the Sake of Allah.”
So, I said to him: “Why? Why do you hate me for the Sake of Allah?”
He replied: “Because your father is from the Ikhwan al-Muslimin.”"
There is no might nor power except with Allah. What Islam is this? I hate him for the Sake of Allah - for what? Because his father is from the Ikhwan al-Muslimin. Sufficient is Allah as the Disposer of our affairs, and this person considers this to be commanding the good and forbidding the evil and a proclamation of the truth, and he thinks that he will have some reward as a result of this, as a result of his putting off the Muslims…”
['Fi Dhilal Surat at-Tawbah'; p. 75]