Surah 4. An-Nisaa', Ayah 68

Four advantages of obedience to Allah are mentioned, in the order in which they will appeal to the beginner in faith: (1) his own benefit ("best for them"): (2) strengthening of his faith, as he becomes more and more at home in the world of faith: (3) reward from Allah's own Presence, such intense conviction that no further arguments are needed: (4) the Straight Way, in which there is no doubt or difficulty whatever in our practical conduct.