This short chapter, though someone else's mail, is about the joy of ministry. It is about longing to see with your own eyes the work of God accomplished in the lives of those in whom you have invested. It is about confidence in God to continue to work, even though I am absent. There is joy and satisfaction in this kind of ministry.
The chapter culminates in a beautiful prayer. The Lord cause you to increase and abound in love for one another. . . to establish your hearts blameless in holiness before our God and Father in the coming of our Lord with his holy angels. The love itself establishes their hearts and prepares them for Jesus return.