When the angels appeared to the shepherds on that first Christmas night, they proclaimed certain things about a Savior who had been born. Some of these were signs for the shepherds so they would know when they had found Him in Bethlehem. In turn, the shepherds proclaimed these things to Mary and Joseph, and to the whole world through the gospel of Luke. God sent His messengers to the lowliest of the low that night, so that they could become unlikely messengers themselves, and a further proof of the truth of their proclamations!