Exodus 7:1

1.And the Lord said unto Moses. Moses again repeats, that consolation was afforded him in his anxiety, and a remedy given for his want of faith; since he was both armed himself with divine authority, and Aaron was appointed as his companion and assistant. For that he was “made a god to Pharaoh,” means that he was furnished with supreme authority and power, whereby he should cast down the tyrant’s pride. (77) Nor did God take away anything from Himself in order to transfer it to Moses; since He so communicates to His servants what is peculiar to Himself as to remain Himself in His completeness. Nay, whenever He seems to resign a part of His glory to His ministers, He only teaches that the virtue and efficacy of His Spirit will be joined with their labors, that they may not be fruitless. Moses, therefore, was a god to Pharaoh; because in him God exerted His power, that he should be superior to the greatness of the king. It is a common figure of the Hebrews, to give the title of God to all things excellent, since He alone reigns over heaven and earth, and exalts or casts down angels, as well as men, according to His will. By this consolation, as I have said, the weakness of Moses was supported, so that, relying on God’s authority, he might fearlessly despise the fierceness of the king. A reinforcement is also given him in the person of his brother, lest his stammering should be any hinderance to him. It has been already remarked, that it was brought about by the ingratitude of Moses, that half the honor should be transferred to his brother; although God, in giving him as his companion, so far lessened his dignity as to put the younger before the first-born. The name of “Prophet” is here used for an interpreter; because the prophetical office proceeds from God alone. But, because God delivered through one to the other what He wished to be said or done, Aaron is made subject to Moses, just as if he had been God; since it is fit that they should be listened to without contradiction who are the representatives of God. And this is made clearer in the second verse, where God restricts the power given to Moses, and circumscribes it within its proper bounds; for, when He directs him to speak whatever He commands, He ranks him as His minister, and confines him under authority, without departing from His own rights.