For the priesthood being changed, or, transferred, etc. As the authority of the Law and the priesthood is the same, Christ became not only a priest, but also a Lawgiver; so that the right of Aaron, as well as of Moses, was transferred to him. The sum of the whole is, that the ministry of Moses was no less temporary than that of Aaron; and hence both were annulled by the coming of Christ, for the one could not stand without the other. By the word Law, we understand what peculiarly belonged to Moses; for the Law contains the rule of life, and the gratuitous covenant of life; and in it we find everywhere many remarkable sentences by which we are instructed as to faith, and as to the fear of God. None of these were abolished by Christ, but only that part which regarded the ancient priesthood. For Christ is here compared with Moses; whatever then they had in common, is not to be taken to the account, but only the things in which they differ. They in common offer God's mercy to us, prescribe the rule of a holy and godly life, teach us the true worship of God, and exhort us to exercise faith and patience, and all the duties of godliness. But Moses was different from Christ in this respect, that while the love of the Gospel was not as yet made known, he kept the people under veils, set forth the knowledge of Christ by types and shadows, and, in short, accommodated himself to the capacity of ignorant people, and did not rise higher than to puerile elements. We must then remember, that the Law is that part of the ministration which Moses had as peculiarly his own, and different from that of Christ. That law, as it was subordinate to the ancient priesthood, was abolished when the priesthood was abolished. And Christ, being made a priest, was invested also with the authority of a legislator, that he might be the teacher and interpreter of the new covenant. At the same time, the word Law is applied, though not in its strict sense, to the Gospel; but this impropriety of language is so far from having anything harsh in it, that on account of the contrast it adds beauty to the sentence, as we find in the seventh chapter of the Epistle to the Romans Moreover, the impiety of the Pope is extremely arrogant, who has inserted this article in his decretals, that he himself is now invested with the same authority as Aaron formerly had, because the Law and also the priesthood have been transferred to him. We see what the Apostle says; he maintains that ceremonies have ceased since the time when Christ came forth with command to proclaim the new covenant. It is then absurd hence to conclude, that anything has been transferred to the ministers of Christ; for Christ himself is alone contrasted here with Moses and Aaron. Under what pretext then can Antichrist arrogate to himself any such authority? I do not indeed speak now for the sake of disproving so gross an arrogance; but it is worth while to remind readers of this sacrilegious audacity, that they may know that this notorious servant of the servants of Christ wholly disregards the honor of his Master, and boldly mangles the Scriptures, that he may have some cloak for his own tyranny.

For the priesthood being changed - According to the prediction in Ps. cx., that it would be. When that occurs, the consequence specified will also follow.
There is made of necessity a change also of the law - The Law so far as it grew out of that, or was dependent on it. The connection requires us to understand it only of the Law "so far as it was connected with the Levitical priesthood." This could not apply to the ten commandments - for they were given before the institution of the priesthood; nor could it apply to any other part of the moral law, for that was not dependent on the appointment of the Levitical priests. But the meaning is, that since a large number of laws - constituting a code of considerable extent and importance - was given for the regulation of the priesthood, and in reference to the rites of religion, which they were to observe or superintend, it followed that when their office was superseded by "one of a wholly different order," the Law which had regulated them vanished also, or ceased to be binding. This was a very important point in the introduction of Christianity, and hence, it is that it is so often insisted on in the writings of Paul. The argument to show that there had been a change or transfer of the priestly office, he proceeds to establish in the sequel.

The priesthood being changed - That is, The order of Aaron being now abrogated, to make way for that which had preceded it, the order of Melchisedec.
There is made of necessity a change also of the law - The very essence of the Levitical law consisting in its sacrificial offerings; and as these could not confer perfection, could not reconcile God to man, purify the unholy heart, nor open the kingdom of heaven to the souls of men, consequently it must be abolished, according to the order of God himself; for he said, Sacrifice and offering, and burnt-offering, and sacrifice for sin, he would not; see Psalm 40:6, Psalm 40:7, compared with Hebrews 10:5-10, and with Psalm 110:4, where it is evident God designed to change both the law and the priesthood, and to introduce Jesus as the only Priest and Sacrifice, and to substitute the Gospel system for that of the Levitical institutions. The priesthood, therefore, being changed, Jesus coming in the place of Aaron, the law of ordinances and ceremonies, which served only to point out the Messiah, must of necessity be changed also.

(6) For the priesthood being changed, there is made of necessity a change also of the (e) law.
(6) He shows how by the institution of the new priesthood, not only the imperfection of the priesthood of Levi was declared, but also that it was changed for this: for these two cannot stand together, because the first appointment of the tribe of Levi shut out the tribe of Judah and made it inferior to Levi: and this latter passage places the priesthood in the tribe of Judah.
(e) Of the institution of Aaron.

For the priesthood being changed,.... Not translated from one tribe, family, or order, to another, but utterly abolished; for though it is called an everlasting priesthood, yet that is to be understood with a limitation, as the word "everlasting" often is, as relating to things under that dispensation; for nothing is more certain than that it is done away: it was of right abrogated at the death of Christ, and it is now in fact; since the destruction of Jerusalem, the daily sacrifice has ceased, and the children of Israel have been many days without one, and without an ephod. And the Jews themselves own, that the high priesthood was to cease in time to come (m), and which they say Azariah the son of Oded prophesied of in 2-Chronicles 15:3.
There is made of necessity a change also of the law; not the moral law, that was in being before the priesthood of Aaron, nor do they stand and fall together; besides, this still remains, for it is perfect, and cannot be made void by any other; nor is it set aside by Christ's priesthood: though there is a sense in which it is abolished; as it is in the hands of Moses; as it is a covenant of works; as to justification by it; and as to its curse and condemnation to them that are Christ's; yet it still remains in the hands of Christ, and as a rule of walk and conversation; and is useful, and continues so on many accounts: but either the judicial law; not that part of it which is founded on justice and equity, and was a means of guarding the moral law, for that still subsists; but that which was given to the Jews as Jews, and some parts of which depended on the priesthood, and so ceased with it; as the laws concerning the cities of refuge, raising up seed to a deceased brother, preserving inheritances in families, and judging and determining controversies: or rather the ceremonial law, which was but a shadow of good things to come, and was given but for a time; and this concerned the priesthood, and was made void by the priesthood of Christ; for that putting an end to the Levitical priesthood, the law which related to it must unavoidably cease, and become of no effect. This the Jews most strongly deny; God, they (n) say, will not change nor alter the law of Moses for ever. The nineth article of their creed, as drawn up by Maimonides, runs thus (o);
"I believe with a perfect faith that this law "shall not be changed", nor shall there be another law from the Creator, blessed be his name.''
But the reasoning of the apostle is strong and unanswerable.
(m) Vajikra Rabba, sect. 19. fol. 160. 4. (n) Seder Tephillot, Ed. Amsterd. fol. 2. 1. (o) Apud Seder Tephillot, Ed. Basil. fol. 86. 2.

For--the reason why Paul presses the words "after the order of Melchisedec" in Psalm 110:4, namely, because these presuppose a change or transference of the priesthood, and this carries with it a change also of the law (which is inseparably bound up with the priesthood, both stand and fall together, Hebrews 7:11). This is his answer to those who might object, What need was there of a new covenant?

For - One of these cannot be changed without the other.