The sermon develops the title King of Righteousness in its exposition of Psalm 110 as a purely prophetic Messianic psalm that applies exclusively to Jesus Christ. After establishing that the psalm consists of two divine oracles, the second oracle in verse 4 declares an irrevocable oath that the Son is a priest forever according to the order of Melchizedek. This designation is then connected to the explanation in Hebrews 7 that Melchizedek means King of righteousness and, because he ruled from Salem, is also King of peace. Both titles fit Jesus Christ, who alone fulfills the combined offices of King and Priest. The sermon notes that this order of priesthood supersedes the later Levitical order because the lesser, represented by Abraham and Levi still in his loins, paid tithes to Melchizedek. In this way the psalm presents Christ not merely as the conquering King who will judge the nations and execute wrath upon His enemies but simultaneously as the eternal High Priest who intercedes for His people. The title therefore reinforces the broader message that Messianic psalms prophesy the full character, ministry, and rule of the coming Savior, here showing how His priestly qualification and royal authority together secure the inheritance and deliverance of the saints.