Why is the purpose of Christ's birth important for Christians?

The purpose of Christ's birth is foundational for the Christian faith as it represents God's promise to save His people from their sins. In Matthew 1:21, the angel tells Joseph that Jesus will save His people, emphasizing that His mission was specific to the elect. This illustrates the grace of God in electing and redeeming a people solely by His mercy. Understanding this purpose encourages believers to appreciate their personal salvation, fostering a deeper relationship with God and fueling their desire to share the Gospel.