The sermon centers on the theological truth that Jesus Christ is the one and only mediator between God and humanity, uniquely designated by God as a high priest according to the order of Melchizedek, fulfilling all that was prophesied in the Law, the Prophets, and the Psalms. Drawing from Luke 24 and Hebrews 5:10, it emphasizes that Christ’s priesthood is not self-claimed but divinely appointed, contrasting His divine authority with the self-appointed false messiahs of history, including Korah and other rebels. The Old Testament is shown to consistently point to Christ’s redemptive work—from the blood sacrifice in Genesis 3 to the prophetic foreshadowing in Isaiah, Zechariah, and the Psalms—demonstrating that every element of Scripture converges on His perfect, once-for-all sacrifice. The sermon underscores the fullness of Christ’s person and work: His incarnation in the fullness of time, His sinless life, His atoning death, and His resurrection, all of which testify to God’s faithful execution of His eternal decree. Ultimately, the message calls believers to spiritual vigilance, urging them to feast on Scripture and grow beyond spiritual infancy, so they may fully cherish Christ as the sole source of eternal salvation and live with patient trust in God’s sovereign providence.