And I have been looking for these Joseph Smith statements for some time. I just couldn’t remember the wording enough to find this one (it is in TPJS page 363)
I would teach it more fully–the spirit is willing but the flesh is weak. God is not willing to let me gratify you; but I must teach the Elders, and they should teach you. God made Aaron to be the mouthpiece for the children of Israel, and He will make me be god to you in His stead, and the Elders to be mouth for me; and if you don’t like it, you must lump it. I have been giving Elder Adams instruction in some principles to speak to you, and if he makes a mistake, I will get up and correct him. (April 8, 1844.) DHC 6:318-320.
which should probably be paired with this statement on page 374
These Scriptures are a mixture of very strange doctrines to the Christian world, who are blindly led by the blind. I will refer to another Scripture. “Now,” says God, when He visited Moses in the bush, (Moses was a stammering sort of a boy like me) God said, “Thou shalt be a God unto the children of Israel.” God said, “Thou shalt be a God unto Aaron, and he shall be thy spokesman.” I believe those Gods that God reveals as Gods to be sons of God, and all can cry, “Abba, Father!” Sons of God who exalt themselves to be Gods, even from before the foundation of the world, and are the only Gods I have a reverence for.