7:11 The writer's point was that since God promised in Psalm 110:4 that the coming Messiah would be a priest after Melchizedek's order, He intended to terminate the Levitical priesthood because it was inadequate. If the Levitical priesthood had been adequate, the Messiah would have functioned as a Levitical priest.
7:12 The priesthood was such a major part of the whole Mosaic Covenant that this predicted change in the priesthood signaled a change in the whole Covenant. This verse is one of the clearest single statements in the New Testament indicating that God has terminated the Mosaic Law (cf. Rom. 10:4). Paul went on to say that Christians, therefore, are not under it (Rom. 6:14-15; Gal. 3:24-25; 5:1; 6:2; 2 Cor. 3:7-11). It is not what God has given to regulate the lives of Christians.
"If Christ is our high priest today, then there has to be a change in the law, since He could not qualify as a priest under the Levitical arrangement (being of the tribe of Judah). If the law has not been done away today, then neither has the Levitical priesthood; but if Christ is our high priest, we cannot be under the law. Every prayer offered in the name of Christ is an affirmation of the end of the law."220
"So by his own independent line of argument our author reaches the same conclusion as Paul: the law was a temporary provision, our tutor to bring us unto Christ . . . but now that faith has come, we are no longer under a tutor' (Gal. 3:24f.)."221
7:13-14 Further confirmation of this change is the prophecy that Messiah would come from the tribe of Judah, not from the priestly tribe of Levi (Gen. 49:10; Mic. 5:2; Isa. 11:1).
