John Gill preaches about the appearance of Christ in human nature, comparing it to the light of the morning when the sun rises, emphasizing that His coming dispels darkness and brings joy and hope to humanity. He explains that Christ's arrival was foretold and serves as a beacon of salvation, illuminating the path for lost sinners and fulfilling prophecies that reveal His nature and mission. Gill highlights that this light is not only for the Jewish people but also for the Gentiles, signifying the universal reach of Christ's gospel. The sermon underscores the righteousness of Christ's rule and the peace that comes with His presence, marking the end of the stormy dispensation of the law. Ultimately, Gill points to the transformative power of Christ as the Sun of righteousness, bringing healing and light to all who believe.