11If perfection could have been attained through the Levitical priesthood (for on the basis of it the law was given to the people), why was there still need for another priest to come-one in the order of Melchizedek, not in the order of Aaron? 12For when there is a change of the priesthood, there must also be a change of the law. 13He of whom these things are said belonged to a different tribe, and no one from that tribe has ever served at the altar. 14For it is clear that our Lord descended from