The essence of godhood is authority, whether it is conceived as sovereignty of a supernatural kind over the whole universe, or on the basis that man is bound by God's law in his worldly life and that all of His injunctions are to be complied with because they emanate from Him.
To Him is due the primal origin of the heavens and the earth. How can He have a son when He had no consort? He it is Who created all things, and He alone has full knowledge of all things; That is God, your Lord! No god there is but He, the Creator of all things; Then give your worship to Him; And He it is Who looks after the safety and well-being of all. (Quran 6:102-103)