What does Psalm 45:3 mean?

To celebrate a king's marriage (Psalm 45:1,9), the writer depicts the ruler as handsome (Psalm 45:2) and as a mighty warrior. Scholars don't know, for sure, which king this was written for. However, the psalm echoes aspects of God's promise that David's line of kings would last forever (2 Samuel 7:12–13, 16). The immediate subject of this song would presumably be one of the Davidic kings. For that reason, there are prophetic parallels between this psalm and the ministry of the Messiah, Jesus Christ (Psalm 24:8; Isaiah 9:6; Zechariah 14:3).

References to a sword, meaning military power, point to the eventual return of Christ. In His first coming, as a humble man, He was not sent for conquest (John 18:36). When He returns, however, He will display His military might, majesty, and glory at His second coming (Revelation 19:11). He is not only the Lamb of God (John 1:29) but also the Lion of the tribe of Judah (Revelation 5:5). He has battled the Devil and his followers throughout the ages, beginning with the Devil's assault on Adam and Eve in the garden of Eden. After His baptism, He battled the Devil in the wilderness, and successfully overcame every temptation the Devil hurled at Him (Matthew 4:1–10). At the end of that battle, the Devil left Jesus, and angels ministered to Him (Matthew 4:11). He struck a fatal blow to the Devil's schemes when He died for our sins on the cross and rose back to life victorious over sin and death (Genesis 3:15; John 12:31; 1 Corinthians 15:50–58; Colossians 2:9–15). He declared this victory when He called out from the cross, "It is finished" (John 19:30).