Read Luke 2:8-20.
Luke 2:8-20 And there were in the same country shepherds abiding in the field, keeping watch over their flock by night. (9) And, lo, the angel of the Lord came upon them, and the glory of the Lord shone round about them: and they were sore afraid. (10) And the angel said unto them, Fear not: for, behold, I bring you good tidings of great joy, which shall be to all people. (11) For unto you is born this day in the city of David a Saviour, which is Christ the Lord. (12) And this shall be a sign unto you; Ye shall find the babe wrapped in swaddling clothes, lying in a manger. (13) And suddenly there was with the angel a multitude of the heavenly host praising God, and saying, (14) Glory to God in the highest, and on earth peace, good will toward men. (15) And it came to pass, as the angels were gone away from them into heaven, the shepherds said one to another, Let us now go even unto Bethlehem, and see this thing which is come to pass, which the Lord hath made known unto us. (16) And they came with haste, and found Mary, and Joseph, and the babe lying in a manger. (17) And when they had seen it, they made known abroad the saying which was told them concerning this child. (18) And all they that heard it wondered at those things which were told them by the shepherds. (19) But Mary kept all these things, and pondered them in her heart. (20) And the shepherds returned, glorifying and praising God for all the things that they had heard and seen, as it was told unto them.
Shepherds were used to be the first to proclaim that the infant Jesus IS Christ the LORD; the LORD and Messiah of Israel. What would that be like? You are watching your herd of sheep outside of Bethlehem in the countryside, and an angel of GOD appears to you to tell you Christ the LORD has just been born in a manger (an animal feeding trough) in a little town during a national census. Then the angel is joined by a host of angels praising GOD and proclaiming peace on earth and good will towards mankind. You go with your work buddies and see for yourselves this Christ the LORD as an infant child wrapped in strips of cloth laying in an animal food trough in the barn area of an inn. You eventually go back to your sheep. What do you do when you have seen such things? What would you be thinking? Would this change your life? Would you watch to see what kind of person this little baby would grow up to be?