What does Revelation 22:21 mean?

John concluded the book of Revelation with a benediction: "The grace of the Lord Jesus be with all. Amen." The grace of our Lord saved John and sustained him during his exile at Patmos. It also provided him with the privilege of seeing sights of God and His position in heaven, and the privilege of learning and writing about the Lord's future plans.

It is completely by the grace of our Lord Jesus that God saves sinners, provides for all their needs, allows them to serve Him, and keeps them until the final day of redemption. When we reach heaven, we will not boast about what we accomplished on earth. We will sing about the grace that saved us, sustained us in every trial, met our every need, secured our safe passage to heaven, and granted us the privilege of seeing our Savior face to face. Grace abolishes every human tendency to bask in self-glory, and it causes us to give God all the glory for what He has accomplished in our lives.