God’s sovereignty is the attribute by which He rules His entire creation, and to be sovereign God must be all-knowing, all-powerful, and absolutely free.  The reasons are these:

                Were there even one datum of knowledge, however small, unknown to God, His rule would break down at that point.  To be Lord over all creation, He must possess all knowledge.  And were God lacking one infinitesimal modicum o fpower, that lack would end His reign and undo His kingdom; that one stray atom of power would belong to someone e4lse and God would be a limited ruler and hence not sovereign.

                Furthermore, His sovereignty requires that he be absolutely free, which means simply that he must be free to do whatever He wills to do anywhere at any time to carry out His eternal purpose in every single detail without interference.  Were He less than free, He must be less than sovereign.

                                                                --A. W. Tozer in The Knowledge of the Holy