Question
What is the story of Jesus' birth? (the nativity / Christmas account)
Analysis
The two accounts
Luke tells the story mostly from Mary's side, Gabriel's announcement (Luke 1:26–Luke 1:38), the journey to Bethlehem, the manger, and the shepherds who hear 'good news of great joy… a Savior, who is Christ the Lord' (Luke 2:10; Luke 2:11). Matthew tells it more from Joseph's side, the angel reassuring Joseph to take Mary as his wife (Matthew 1:18–Matthew 1:25), the magi guided by a star (Matthew 2:1–Matthew 2:12), and the family's flight to Egypt to escape King Herod, who slaughtered the infants of Bethlehem (Matthew 2:13–Matthew 2:18). Together they present one event from two angles, anchored in prophecy: the virgin (Isaiah 7:14) and Bethlehem (Micah 5:2).
What the birth means
The Gospels are less interested in sentiment than in who this child is. Matthew frames the birth with two names, Jesus, 'for he will save his people from their sins' (Matthew 1:21), and Immanuel, 'God with us' (Matthew 1:23). John states the same truth without a manger scene: 'the Word became flesh and dwelt among us' (John 1:14), the incarnation, God taking on human nature. So the nativity is the beginning of the gospel: the eternal Son entering the world to rescue it. (A common detail worth correcting: the number of magi is not given, 'three' comes from the three gifts, a later tradition; see the wise-men answer.)