Worthy is the Lamb who was slain (Revelation 5:12)
Divine Service
Our Sunday church service is called "Divine Service" because in it, the Almighty God serves us...with His Word, His sacraments, His absolution of our sins, His promises, and His presence.
This is different from supposing that "worship" is something that we do for God, or that it is a time for self-improvement tips or striving to be "relevant" to a non-Christian culture.
Together with the angels, archangels and all the saints in heaven we worship the Lamb who is upon the throne. Jesus Christ makes us worthy of participating in such exalted worship by clothing us in His righteousness.