The sermon centers on the identity and work of Jesus Christ as the Great Savior of the world, grounded in the angelic announcement to the shepherds in Luke 2. It outlines the urgent need for a Savior by highlighting humanity's guilt, the impending punishment of sin, and the bondage of the sinful nature. The message emphasizes the character of Christ, who is both mighty and willing to save through His sinless life, sacrificial death, and resurrection. It asserts the exclusivity of salvation in Christ alone, rejecting all other means of redemption. The sermon concludes with a direct challenge to the listener to respond to this offer of grace immediately, asking what they will do with Jesus.