Martin Luther asserted that the true theologian was the one who could rightly distinguish between law and gospel. When Lutherans, including this Lutheran, work at theology we almost always work within the parameters of law and gospel. Protestant theology in general talks about three uses of the law. The first use of law is usually termed the political or civil use of law. The second use of the law, the spiritual or theological use, is the law as a mirror in which we see our lives; the law as revealer of our sins. The third use of the law is law as a guide for Christian living. There is much debate even among Lutherans whether Luther taught the third use of the law. I do not believe that he did.

The function of the civil use of law is to help humankind create a civil society. Since all people bear the law within their being, all people can work to make society a more civil place to live. Preaching on the civil use of the law would call upon people to make use of their rational intelligence in making ethical decisions in life and in working toward a civil society. There is nothing particularly Christian about the civil use of the law. It need not, therefore, occupy too much of our preaching energy. The dialogical nature of the classroom is much better suited for the important discussions of the nature of the way we might best work for an improved civil order.

The theological or spiritual use of the law was for Luther the proper use of the law. The law, that is, reveals to us our sinfulness. "What then should we say? That the law is sin? By no means! Yet, if it had not been for the law, I would not have known sin .... Apart from the law sin lies dead. I was once alive apart from the law, but when the commandment came, sin revived and I died, and the very commandment that promised life proved to be death to me (Romans 7:7, 8-10)."

The law always kills! That was Luther's dictum about the spiritual use of the law. The law always leaves me helpless, consigned to wrath, doomed to death. This is the proper use of the law and is therefore the proper use of the law in preaching. To preach the law is to render people helpless in their relationship to God. The law kills us and leaves us dead in the eyes of God.

The third use of the law is the law as a guide to Christian living. For Calvin this was the proper use of the law. This marks a radical breach among protestants. Some protestants see the law as God's revealed law for life. Clearly such a law should be preached so that people know how to live! I have already stated my conviction that Martin Luther did not teach the third use of the law in this manner. He did not believe that God revealed the law either to Israel or to Christians as a guide to living! The most radical instance of this is Luther's comments on the law as given to Moses. Luther said, "I keep the commandments which Moses has given, not because Moses gave commandments, but because they have been implanted in me by nature, and Moses agrees exactly with nature etc."1

Luther believed that the law was natural to every person alive. That's the first use of the law! For Luther, therefore, the law does not need to be revealed. If that is the case then we will need spend little time preaching the law as a guide to life. Here, too, it may be better to deal with such ethical questions about life in discussion forums under the assumption that each person brings unique resources, resources given them by God the Creator, to the discussion.

Preach the law. Preach the costly law. Preach the law that costs sinners their life and brings them to the point that they cry out for a Savior.