"By God, if I fast all days and pray all nights, spend all my wealth in the way of God without account and if I die on the day with no love for those who obey God and with no hatred for those who do not obey God, it will be of no use to me."
(Attributed to Abdullah ibn Omar (may God be pleased with him) in Ihya-Ulum-id-Din, the chapter of Love and Brotherhood)