D.L. Moody emphasizes the joy that Christians can experience even in the face of persecution, as highlighted in Luke 6:22. He encourages believers to rejoice in their trials, knowing that their true reward awaits them in heaven, and that their joy is a source of strength that cannot be taken away by the world. Moody reflects on the legacy of faithful servants of God, whose influence continues long after their lives, and he urges the church to embody joy, which will empower their mission and outreach. He reminds us that the joy of the Lord is a treasure that remains with us, regardless of earthly circumstances, and that we should strive to maintain this joy as we await our eternal reward.