The Prophet (sa) said:
Three types of people will find the sweetness of imân; the one to
whom Allâh and
His Messenger are more beloved than anything else; the one who loves another person purely for the sake of
Allâh; and the one
who hates to return to disbelief after Allâh has rescued him from it, just as he would hate to be thrown into the
fire. And weeping
is included in this sweetness. (Bukhârî and Muslim)