Sweetness of Imaan

The Prophet of Islaam, Muhammad (peace and blessings of Allaah be upon him) said:  

“There are three things, whoever attains them will find the sweetness of faith: when Allaah and His Messenger are more beloved to him than everything else; when he loves another person he loves him only for the sake of Allaah; and when he hates to return to disbelief (kufr) as he would hate to be thrown into the Fire.” 

[Reported by al-Bukhaaree (no. 15)]