Anas bin Malik[RA] The Messenger of Allaah (peace and blessings be upon him) said:
"None will have the sweetness (delight) of Faith
(a) till he loves a person and loves him only for Allaah's sake,
(b) and till it becomes dearer to him to be thrown in the fire than to revert to disbelief after Allaah has brought him out of it, (c) and till Allaah and His Messenger become dearer to him than anything else." [Bukhari]