TSK · Exodus 29:9

In the tent of meeting outside the curtain that is before the testimony, Aaron and his sons are to arrange it from evening to morning before the LORD. This is to be a lasting ordinance among the Israelites for generations to come.

“For Aaron’s sons you are to make tunics, sashes, and headbands for glory and for beauty.

and anoint them just as you anointed their father, so that they may minister as my priests; their anointing will make them a priesthood that will continue throughout their generations.”

And you must not go out from the entrance of the Meeting Tent for seven days, until the day when your days of ordination are completed, because you must be ordained over a seven-day period.

He has brought you near and all your brothers, the sons of Levi, with you. Do you now seek the priesthood also?

It was a memorial for the Israelites, that no outsider who is not a descendant of Aaron should approach to burn incense before the LORD, that he might not become like Korah and his company– just as the LORD had spoken by the authority of Moses.

So it will be to him and his descendants after him a covenant of a permanent priesthood, because he has been zealous for his God, and has made atonement for the Israelites.’”

Now this man Micah owned a shrine. He made an ephod and some personal idols and hired one of his sons to serve as a priest.

And no one assumes this honor on his own initiative, but only when called to it by God, as in fact Aaron was.

Jesus and the Priesthood of Melchizedek So if perfection had in fact been possible through the Levitical priesthood– for on that basis the people received the law– what further need would there have been for another priest to arise, said to be in the order of Melchizedek and not in Aaron’s order?