Do you think that you could enter paradise unless God takes cognizance of your having striven hard [in His cause], and takes cognizance of your having been patient in adversity?
Al-Imran (The Family of Imran) Verse 142
The Prophet said, "The most hated person in the sight of Allah is the most quarrelsome person."
Sahih Bukhari: Volume 3, Book 43, Number 637