Now if perfection came through the Levitical priesthood (for on the basis of it the people received the law ), what further need was there for another priest to appear, said to be according to the order of Melchizedek and not according to the order of Aaron?
just as the Lord commanded him through Moses. It was to be a reminder for the Israelites that no unauthorised person outside the lineage of Aaron should approach to offer incense before the Lord and become like Korah and his followers.