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Hebrews 7:20–22

“This one was made a priest with an oath by the one who said to him: ‘The Lord has sworn and will not change his mind, “You are a priest forever.” ’ This makes Jesus the guarantor of a better covenant” (vv. 21–22).

Our study of Hebrews 7 requires us to walk through some deep theological teaching on the priesthood of Christ and the law of God that is based on the figure of Melchizedek, who is fairly obscure to many people because the Old Testament says very little about him. Yet, we should not let the relative obscurity of Melchizedek blind us to the immensely comforting truths wrapped up in Christ’s Melchizedekian priesthood. Today’s passage, in fact, takes the truth of Christ’s priesthood as a great comfort to us.

Again quoting from Psalm 110, the author of Hebrews notes that Christ’s priesthood, unlike the priesthood of the Levites, was secured by an oath (Heb. 7:20–21). In light of the fuller explanation in the teaching of Jesus (Matt. 22:41–46), we understand that Psalm 110 gives us a window into the interchange between God the Father and God the Son incarnate in which the Father swears an oath to make the incarnate Son a priest forever in Melchizedek’s order. Of course, this was never done with the Levitical priesthood, which was given by fiat but not established forever by a divine vow. One thing to note here is that the lack of an oath means, implicitly, that the Levitical priesthood and thus the Mosaic religious system were never meant to be in place forever. God was never committed to them as He is to the order of Christ’s priesthood.

Second, in light of Hebrews 6:13–20, God’s swearing an oath to make Jesus a priest forever greatly comforts us. It convinces us that our Creator is committed to the mediatorial work of Jesus and to none other. We never have to fear that God will change His mind about Christ’s priesthood or that the work of Jesus will prove inadequate to accomplish the purposes God has for it. The Lord, as it were, put His own honor on the line when He swore to establish Christ as the eternal, perfectly effectual priest in the order of Melchizedek. And since God will not sacrifice His own honor (Isa. 42:8), Jesus must remain our High Priest forever and really will save all those who have been given to Him by the Father. John Owen comments, “Christ’s being made a priest forever by the oath of God, is a solid foundation of peace and consolation to the church.”

Finally, the unchanging and unfailing commitment of God to the covenant in Christ, as seen in the divine oath, proves that the new covenant is better than the old (7:22). It will last forever, so there is no good reason to abandon Jesus.

Coram Deo Living before the face of God

God has given us not only His infallible and inerrant Word to guide us in the truth but also teachers whom He has equipped to instruct us in this Word. We should therefore pay heed to the godly and wise teachers whom the Lord has appointed in His church, and we should thank God for the teachers He has given us. It is a blessing indeed to sit under sound instruction in the Word of God.


For Further Study
  • Isaiah 59:1
  • Hosea 1:7
  • Matthew 1:21
  • Hebrews 5:8–10

The Basis of Christ’s Priesthood

Christ’s Eternal, Effectual Priesthood

Keep Reading The Twentieth Century

From the May 2020 Issue
May 2020 Issue