“…these two sermons must continue to be preached in Christendom, namely: the first, the teaching of the Law or of the ten commandments, and the second, the doctrine concerning the grace of Christ. For if either of these fall it pulls the other with it; while on the other hand, wherever the one remains steadfast and is faithfully put into practice, it brings the other with it. And God has ordained that these two themes shall be preached forever in the Christian Church…”
Martin Luther, 1537, in a sermon preached at Wittenberg
