A.B. Simpson emphasizes the significance of Jesus as the Apostle and High Priest of our profession, highlighting His role as God's ultimate messenger who reveals the fullness of God's love and truth. The sermon explores the unique position of the Epistle to the Hebrews, which underscores Christ's superiority over Moses, Joshua, and angels, affirming His divine authority and the importance of His message. Simpson articulates that through Jesus, God has spoken definitively, bridging the gap between humanity and the divine, and calls believers to recognize and respond to this profound revelation. He stresses that Christ is not only the messenger but also the living Word, embodying the truth of God and inviting us into a deeper relationship with Him. The sermon concludes with a call to embrace Jesus as the Captain of our salvation, leading us into the promised rest of faith.