What does the Bible say about the purpose of Jesus' birth?

The purpose of Jesus' birth is explicitly stated in Matthew 1:21, where the angel tells Joseph that the child conceived in Mary is to be named Jesus because He will save His people from their sins. This fulfillment of God's promise highlights the necessity of a Savior for mankind, illustrating that Jesus' incarnation was not merely for temporal joy, but with a profound mission to redeem sinful humanity from eternal condemnation. His birth signifies the beginning of a divine plan enacted from eternity to bring salvation to those chosen by God.