so that, that guilt of sin, which burdens the consciences of men, as having more immediately to do with God, was taken away only by Christ’s sacrifice; in which respect, the efficacy hereof far exceeds all the ends and designs of the sacrifices, which were offered under the law. And this farther appears, inasmuch as these sacrifices were to be repeated, there being a continual remembrance of sin; for this supposes, that sin was not hereby wholly expiated in the sight of God: and, in this, they also differ from the sacrifice Christ offered, inasmuch as that, being effectual to take away sin, was offered but once, chap. x. 10, 14. _6thly_, The priests under the law were mortal, and therefore the priesthood was successive; but Christ, as he was not from them by a lineal descent so he had no successor in his priesthood. In this, the apostle opposes him to them, when he says, _They truly were many, because they were not suffered to continue, by reason of death; but this man, because he continueth ever, hath an unchangeable priesthood_, chap. vii. 23. Again, as the priesthood ceased, in particular persons, by death, so the high priesthood was sometimes taken away from those that were advanced unto it, for some instances of maladministration: thus the high priesthood, for some time, descended in the line of Eleazar, the elder branch of Aaron’s family; and afterwards, during the reign of the judges, it was transferred to the younger branch of his family, namely, the descendants from Ithamar, in which line it was when Eli was high priest; and afterwards, when his sons, by their vile behaviour, forfeited their right to the high priesthood, and God threatened that he would take it away from his family, 1 Sam. ii. 30. compared with ver. 35. and 1 Kings ii. 35. (which was accomplished when Abiathar, in the beginning of Solomon’s reign, was thrust from the priesthood) it again descended in Zadock, to the elder branch of Aaron’s family. Again the priesthood itself was not designed to continue for ever, but only during that dispensation; after which, there was to be no altar, priests, nor sacrifice: But Christ’s priesthood, as it was unalienable, so it could never be forfeited by male-administration, or descend to any other; therefore he is said to be a _Priest for ever_, which seems to be the meaning of that scripture, in which his priesthood is considered, as different from the Levitical priesthood, as _those priests were made without an oath; but this with an oath, by him that said unto him, The Lord sware, and will not repent, Thou art a priest for ever_, chap. vii. 21. which oath not only signifies the establishing of him in his priesthood, but it secured to him that he should never fall from it.