The sermon centers on Zechariah's prophetic declaration at the naming of his son John, marking the end of a 400-year prophetic silence and the public inauguration of God's redemptive plan. Through Zechariah's words, the core message emerges: God's grace, revealed in the coming Messiah, is the sole source of salvation, redemption, and hope for humanity, who are by nature enslaved to sin, despair, and self-worship. The prophecy affirms that salvation is not earned but secured by God's covenant faithfulness—fulfilled in Christ, the horn of salvation from David's line—whose substitutionary atonement is foretold in Scripture from Genesis to Isaiah. The sermon emphasizes that assurance of salvation rests not on human effort but on faith in God's promises, particularly the Abrahamic covenant, where belief in God's word is the mark of true regeneration. Ultimately, redemption is not merely forgiveness but the lifelong, joyful purpose of serving God in holiness and righteousness, culminating in the eternal beatific vision of knowing and delighting in Christ Himself.