J.R. Miller emphasizes that no true work for God is ever in vain, using the apparent failure of Jesus' life and death as a profound example of how what seems like failure can lead to glorious success. He encourages believers to remain faithful in their duties, asserting that the true impact of their work may not be immediately visible but will ultimately bear fruit in God's timing. Miller highlights that real success lies not in visible results or applause but in the silent, transformative influence of God working through us. He reminds us that God's work often occurs quietly, like the sunbeams and dew that nourish life without fanfare. Ultimately, if we are true to our calling and allow God to work through us, our efforts will never fail to produce blessings.