I just would like to give a slightly different view to explain how I understand the subject of the priesthood. When a man becomes a god, he receives an inheritance in the universe, a place or a dévelloper send his seed of mind. When it receives this legacy of his heavenly father becomes god, and so it has full authority over the possession of his inheritance so . This authority is an aside, as a dedicated member of the church a call, and authority on the subject, or the materials , its total area is , it receives the power to give life to everything . So when he sends his spirit children on one of his worlds he give them some of this authority it holds. Nobody is above him, he owns his kingdom, so he decides something for everyone . Heavenly Father , in his kingdom , our world, and he organized his church to convey his authority , his right to rule and give life to everything ... that is the priesthood. When a man becomes a god he receives the authority to rule over his kingdom and do what he wants , that is why he must have perfect charity , to prevail in court. The authority he holds his own, and his goal is giving the dévelloper us the ability to reign in justice and give life like him, so that one day we got our turn authority over our kingdom . Here , it is quite simple actually . Angelo ps : sorry for the translation , I made with google