First, nobody can deny that we, as well as the papists, have received holy baptism and because of that are called Christians. Now baptism is not something new, invented by us in our own day, but it is the same ancient baptism instituted by Christ, in which the apostles and the early church and all Christians have been baptized. If then we have the same baptism as the original, ancient (and, as the creed says, “catholic,” that is, “universal”) Christian church, and are baptized in it, then we belong to the same ancient universal church; and they like us, and we like them, are baptized with one baptism; and therefore there is no difference between us as to baptism. But baptism is the first and most important sacrament, without which the others are all nothing, as they must admit. This is why the papists cannot truthfully call us a different or a new or a heretical church, since we are children of the ancient baptism, together with the apostles themselves and all of Christendom, Ephesians 4 [:5], “one baptism.” (Luther’s Works, v.41, p.194-195)
Picture: The chalice has three scenes depicted on the cup and three on the base. This one on the base is the Nativity scene.