Why is the birth of Jesus significant for Christians?

The birth of Jesus is significant as it marks the divine incarnation—God taking on human flesh. This event fulfills numerous prophecies from the Old Testament, enhancing the truth that God is faithful to His covenantal promises. Jesus' arrival, as described in Isaiah 7:14 as 'Immanuel' (God with us), represents God's commitment to engage with His creation. For Christians, His birth heralds the hope of salvation, as it sets in motion the events that will lead to His sacrificial death and resurrection, offering redemption to all who believe.