For now we live, if you stand fast in the Lord.
Timothy has now returned and Paul is overjoyed at the news he has brought. The believers in Thessalonica have progressed in their faith and love, and their longing to see Paul is as great as his longing to see them (6-8). He does not know how to thank God for such good news. He desires more than ever to revisit them, so that he can further help their growing faith (9-10). But he will return only if God wants him to. God is the one who guides their progress, and only he can make them strong. In view of Christ’s return they should increase in love and holiness (11-13).