A.B. Simpson emphasizes the profound partnership we have with God in our work for Him, illustrating that just as a publishing firm includes all employees as partners, we are co-laborers with Christ. He highlights that God pays our debts, supplies our resources, and prepares us for the work of His kingdom, allowing us to share in the joy of the harvest. Simpson urges believers to recognize their role in this divine partnership, stressing the importance of working in God's way and strength, rather than relying solely on human effort. He reassures that our service is not a burden but a joyful overflow of Christ's work in us, and that we will be rewarded for our faithfulness. Ultimately, he calls us to be true representatives of Christ, fulfilling our responsibilities as His hands and feet in the world.