A decree from Caesar Augustus which was sent out to the entire Roman Empire to have all registered, caused Mary and Joseph to go to their own town. They went up from Galilee from the town of Nazareth to Judea, to the town of David, which is called Bethlehem, because he was of the house and family of David (Luke 2:4). What seemed a problem to them, supposedly, when there was no room anywhere else for them to lodge, it was providential for them to lodge at a place where sacrificial lambs were cared for. These lambs were without blemish, perfect for the atonement of sin at Passover time. That was the place where only these types of animals were found. Joseph and Mary were not aware of the deep meaning of that place in relationship with their new-born Son- the Lamb of God.
Light from the Word 