“‘You cannot serve God and mammon at the same time.’ The shepherds indicate this in that they are found in the field under the sky, and not in houses; thus they do not cling or cleave to temporal goods. In addition, they are in the field at night, despised and not recognized by the world which sleeps during the might and likes to strut and be seen during the day. But the poor shepherds are up and working during the night. They represent all the lowly ones who lead a poor, despised, unostentatious life on earth and live under the open sky, subject to God. They are ready to receive the gospel.”

Martin Luther. “Sermon on the Gospel for Christmas Eve.” Luther’s Works. Volume 52. Philadelphia: Fortress Press, 1974, page 25.