The most fundamental teaching of Islam is to believe in the Oneness of God, in the sense of His being the only Creator, Preserver, Nourisher, etc. But this belief is not enough. Many of the idolaters knew and believed that only the Supreme God could do all this and yet they associated other gods with Him. Therefore, one must acknowledge the fact that it is God alone who deserves to be worshipped, and thus abstain from worshipping any other thing or being. Likewise, Muslims believe that God has no father or mother, no son or daughter. None is equal to Him. He is God of all humankind, not of a special tribe or race.