How do we know the truth of Christ's birth?

The truth of Christ's birth is grounded in the fulfillment of historical prophecies, which serve as beacons of divine truth. For instance, the prophecy of His birthplace in Bethlehem as stated in Micah 5:2, was fulfilled when Joseph and Mary traveled there for the census. The angelic announcement to the shepherds, declaring the birth of the Savior, corroborates the numerous prophecies and is a testament to God's faithfulness. As the shepherds witnessed these events and believed, it exemplifies the interaction of faith with the fulfillment of God's Word.