Translation:

68. And We should have shown them the Straight Way.

Notes (Tafseer)

585. 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.