T. Austin-Sparks emphasizes that the ultimate goal of God's plan is to bring heaven's fullness to earth, illustrating that everything earthly must align with heavenly principles. He explains that God sovereignly chooses vessels, both individuals and communities, to fulfill His divine purpose, often through extraordinary experiences that prepare them for a larger mission. The sermon highlights the importance of humility and servitude, as exemplified by Joshua, who began as an attendant before becoming a leader, and underscores that true ministry arises spontaneously from what God has done in us. Sparks also points out that God's grace often operates through unlikely means, as seen in the story of Rahab, and that the natural man must be left behind to embrace the spiritual life. Ultimately, he calls for believers to recognize their collective role in God's heavenly purpose, which transcends individual experiences.