Why did God need to establish a different priesthood? Probably because none of the others have answered the question: Why did God create the universe?
A Priest in the Order of Melchizedek
An Anchor of the Soul
Danby House That by two immutable things, in which it was impossible for God to lie, we might have a strong consolation, who have fled for refuge to lay hold upon the hope set before us: Which hope we have as an anchor of the soul, both sure and stedfast, and which entereth into that …