According to Abu Hurayrah (RadiyAllahu Anhu), the Messenger of Allah (Sallellahu Alayhi Wa Sallam) said:
“The gates of Paradise will be opened on Mondays and on Thursdays, and every servant [of Allah] who associates nothing with Allah will be forgiven, except for the man who has a grudge against his brother. [About them] it will be said: ‘Delay these two until they are reconciled; delay these two until they are reconciled.’”
[Muslim (also by Malik and Abu Dawud)]
As long as we nurture any kind of enmity in our heart and prolong any conflict with a Muslim brother, we’re giving evidence of the weakness of our faith. For Faith in Allah is expressed through obedience to Allah. And Allah has said this in the verses of the Quran:
“The believers are but a brotherhood. So make reconciliation between your brothers, and have Taqwa of Allah so that you may receive mercy.”
(Surah Hujrat:10)
“So have Taqwa of Allah and settle all matters of difference among you, and obey Allah and His Messenger, if you are believers.
(Surah Aanfal:1)
Whatever be our differences in opinions or feelings, we’re expected to set them aside and maintain good relations with each other. Ego ‘nafs’ is never to be allowed to supersede true faith. The whole purpose of our life is to prepare ourselves for the hereafter, and with this long term goal in mind we have to overcome pettiness and trivialities. Our constant struggle is with two real enemies. One is Satan who keeps making the world and worldliness more and more alluring for us. The other is our own ego that inflates our importance in our eyes beyond any sensible measure. It is these that cause conflicts and misunderstandings.