Book of Psalms - Chapter 110 - Verse 4

In this verse, the LORD is making a solemn oath that will not be changed. He is declaring that a certain individual is appointed to be a priest forever in the order of Melchizedek. This statement holds great significance because it shows the eternal nature of the priesthood that this individual will hold. The order of Melchizedek is a unique and distinguished priesthood, different from the typical Levitical priesthood that was prevalent in ancient Israel. Melchizedek, an enigmatic figure mentioned in the book of Genesis, was both a king and a priest who blessed Abraham. By declaring someone to be a priest in the order of Melchizedek, the LORD is indicating a special and enduring role for them in His service. This verse foreshadows the coming of Jesus Christ, who would later be recognized as a High Priest in the order of Melchizedek, offering a new covenant and eternal salvation for all who believe in Him.

One theological interpretation of the verse "The LORD hath sworn, and will not repent, Thou art a priest forever after the order of Melchizedek," revolves around the idea of Jesus Christ being a high priest in the order of Melchizedek. This is significant as it highlights Christ's eternal priesthood, unlike the Levitical priesthood which was based on lineage and could be transferred. Melchizedek, as mentioned in the book of Genesis, was a priest and king who blessed Abraham. By likening Christ to Melchizedek, it underscores Christ's superior priesthood and authority. Additionally, the concept of an eternal priesthood emphasizes Christ's unchanging nature and everlasting presence as our mediator before God. This verse strengthens the belief in Christ's divinity as the ultimate high priest who intercedes on behalf of humanity.