The shepherds in the account of Luke (2:8-14) demonstrate the grace to be shown to the unclean and outcast.
In the first century, outside of lepers, shepherds were the lowest on the social strata. They were not permitted to come and worship in the Temple because they were ceremonially unclean–even though these shepherds here in Luke likely watched this flock for the temple chiefs who would use them for sacrifices in worship.
But whereas these shepherds could not come close to God in the Temple worship, God came to them to tell them the Good News of a Savior born to them!
All of us are unclean and cannot approach the Throne with any confidence (Eph. 2:1-3, Hebrews 4:14-16). So God comes to us and is with us to save us from our sin. He makes us righteous even when we have none to offer Him (2 Cor. 5:17-21).
So on this 27th day of December, I wish you all a Merry Christmas. Joy to the world, the Lord is come.