Excerpt from the Lutheran Service Book of LCMS
The Lord's service calls forth our service in sacrifices of praise and thanksgiving to Him and in loving service to one another. Having been called, gathered, enlightened, and sanctified by the Holy Spirit, we receive His gifts with thankfulness and praise. With psalms, hymns, and spiritual songs, we joyfully confess all that God has done for us, declaring the praises of Him who called us out of darkness into His marvelous light. Our song joins with the song of every saint from every age, the new song of Christ's holy people, declaring: "Worthy is the Lamb who was slain, to receive power and wealth and wisdom and might and honor and glory and blessing!" (Rev. 5:12).
Within the Lutheran tradition, the wedding of the Word of God to melody was modeled by the reformer himself. Martin Luther had a high regard for music and urged the Church to use it wisely as a vehicle for proclaiming the Gospel. "Next to theology," he wrote, "I accord to music the highest place and the greatest honor." Retaining the best of pre-Reformation hymnody, as well as adding a great number of new hymns to the Church's song, Luther and succeeding generations of hymn writers continue to inspire the faithful to lift their voices in praise and thanksgiving to the triune God.