Hebräer 7:22

surety--ensuring in His own person the certainty of the covenant to us. This He did by becoming responsible for our guilt, by sealing the covenant with His blood, and by being openly acknowledged as our triumphant Saviour by the Father, who raised Him from the dead. Thus He is at once God's surety for man, and man's surety for God, and so Mediator between God and man (Heb 8:6). better-- Heb 8:6; Heb 13:20, "everlasting." testament--sometimes translated, "covenant." The Greek term implies that it is appointed by God, and comprises the relations and bearings partly of a covenant, partly of a testament: (1) the appointment made without the concurrence of a second party, of somewhat concerning that second party; a last will or testament, so in Heb 9:16-17; (2) a mutual agreement in which both parties consent.

The doctrine of the priestly office of Christ is so excellent in itself, and so essential a part of the Christian faith, that the apostle loves to dwell upon it. Nothing made the Jews so fond of the Levitical dispensation as the high esteem they had of their priesthood, and it was doubtless a sacred and most excellent institution; it was a very severe threatening denounced against the Jews (Hos 3:4), that the children of Israel should abide many days without a prince or priest, and without a sacrifice, and with an ephod, and without teraphim. Now the apostle assures them that by receiving the Lord Jesus they would have a much better high priest, a priesthood of a higher order, and consequently a better dispensation or covenant, a better law and testament; this he shows in this chapter, where, I. We have a more particular account of Melchisedec (Heb 7:1-3). II. The superiority of his priesthood to that of Aaron (Heb 7:4-10). III. An accommodation of all to Christ, to show the superior excellency of his person, office, and covenant (Heb 7:11 to the end).

7:22 Legally, the one who guarantees (literally the guarantee or the guarantor) refers to the person who bears the risk of another person’s investment or debt. Because of God’s oath, Jesus’ priesthood is unassailable, so our covenant relationship with God is secure. Having Jesus as the guarantor makes the new covenant better.