T. Austin-Sparks emphasizes the authority of the Man on the Throne, illustrating how God's movement is symbolized by the wheels in Ezekiel's vision. He explains that these wheels represent mobility, directness, and the necessity for God to have freedom to move without human interference. Sparks highlights that God's movements may sometimes pause, waiting for our readiness, but His purpose remains unchanged. He connects this to the New Testament, asserting that all authority is given to Jesus, who calls us to follow His lead into the world. The sermon concludes with the paradox of ministry, where sweetness and bitterness coexist, reflecting the nature of the Cross.