If therefore perfection were by the Levitical priesthood - As the Jews supposed. They were accustomed to regard the system as perfect. It was an appointment of God, and they were tenacious of the opinion that it was to be permanent, and that it needed no change. But Paul says that this could not be. Even from their own Scriptures it was apparent that a priest was to arise of another order, and of a more permanent character, and this he says was full proof: that there was defect of some kind in the previous order. What this defect was, he does not here specify, but the subsequent reasoning shows that it was in such points as these - that it was not permanent; that it could not make the worshippers perfect; that the blood which they offered in sacrifice could not take away sin, and could not render those who offered it holy; compare Hebrews 7:19, Hebrews 7:23-24; Hebrews 10:1-4.
For under it the people received the law - This assertion seems necessary in order to establish the point maintained in Hebrews 7:12, that if the priesthood is changed there must be also a change of the Law. In order to this, it was necessary to admit that the Law was received under that economy, and that “it was a part of it,” so that the change of one involved also the change of the other. It was not strictly true that the whole Law was given after the various orders of Levitical priest were established - for the Law on Sinai, and several other laws, were given before that distinct arrangement was made; but it was true:
(1)That a considerable part of the laws of Moses were given under that arrangement; and,
(2)That the whole of the ceremonial observances was connected with that. They were parts of one system, and mutually dependent on each other. This is all that the argument demands.
What further need was there ... - “If that system would lead to perfection; if it was sufficient to make the conscience pure, and to remove sin, then there was no necessity of any other. Yet the Scriptures have declared that there “would be” another of a different order, implying that there was some defect in the former.” This reasoning is founded on the fact that there was an express prediction of the coming of a priest of a different “order” Psalms 110:4, and that this fact implied that there was some deficiency in the former arrangement. To this reasoning it is impossible to conceive that there can be any objection.