Job 34:13

Whom else hath He appointed over the earth, or whom hath He placed over the world which He hath made?

In order, namely, that thou mayest understand, No one. For He governs indeed by Himself the world which He created by Himself: nor does He need the aid of others in governing, Who needed it not for creating. But these points are brought together, in order that he might plainly point out, that if Almighty God does not neglect to govern by Himself the world which He created, He most certainly governs aright that which He created aright; that He does not order in unmercifulness that which He fashioned in mercy; and that He Who provided for their being before they were made, does not forsake them after their creation. Because then He is present to rule, Who was the First Cause at their creation, He therefore does not omit to take care of us.

He proves there is no injustice in God first from the fact that if God were unjust, one would not find justice anywhere, since the universal judgment of all men pertains to him, and so he says, "What other has he constituted on the earth?" as if to say: Is it to be believed that someone was constituted by God to judge all the earth justly if he is evil? Thus he says that one should not believe there is someone else to judge the earth because the same person is the maker and the governor of the earth. So, just as he did not commit the making of the world to anyone else, so he did not give the governing of the world to anyone else, and he expresses this saying, "Or whom did he place over the world which he has fashioned?" as governor of the whole world. He implies the answer is "No one," because just as he has fabricated the world by himself, so also he himself governs and judges the world by himself. True he has executors of his government like ministers, but he himself is the orderer of all. It is not possible for the governing of the whole world be unjust in any way.