"For unto you is born this day in the city of David a Savior, who is Christ the Lord." Reflecting on this verse from the Gospel of Luke (2:11), Martin Luther declared it to be a summary of the gospel: "See here what the gospel is, namely, a joyful sermon about Christ our Savior. Whoever preaches him rightly preaches the gospel and pure joy." Reformation commentators meditated upon the significance of the good news of Jesus Christ during a vibrant era in the history of the church that was characterized by spiritual renewal and reform, doctrinal controversy (especially over matters such as the...