Islam teaches the purest from of Monotheism and regards polytheism as the deadliest sin. A Muslim addresses GOD By his personal name ALLAH ......the word GOD and its equivalents in other languages being unstable in the matter of connotation .ALLAH according to islam is the one GOD who is indivisible in Person and who has no partner .wife,son or daughter .He is the Matchless and naught is as his likeness .He begetteth not,nor was he begotten. he is the first, the last, the Eternal, the infinite,the Almighty, the omniscient, the omnipresent.he is the creator,the nourisher,the cherisher of all things. he is the all just,the avenger of the wrongs done to the weak and the oppressed, the compassionate,the merciful and loving. the guide, the friend ,the magnificent,the glorious, the beautiful and the true.In short,He is the Possessor of All Excellence