Those who have deprived themselves of this Resurrection by reason of their mutual hatreds or by regarding themselves to be in the right and others in the wrong, were chastised on the Day of Resurrection by reason of such hatreds evinced during their night. Thus they deprived themselves of beholding the countenance of God, and this for no other reason than mutual denunciations.

The Bab
Another Quote

6 Ways to make a lasting impression