Allah needs no praise, for he is above all praise. He needs no petition, for he knows our needs better than we do ourselves, and his bounties are open without asking to the righteous and sinners alike. The prayer is primarily for our own spiritual education, consolation and confirmation.
That is the way the words in this Sura are given to us in the form in which we should utter them.
RAHMAN THE MOST GRACIOUS.
RAHIM - THE MOST MERCIFUL.
RABB - ALLAH CARES FOR ALL THE WORLD HE HAS CREATED.