When contemplating the law, we must always keep grace in the forefront of our hearts. Listen to what Luther teaches about this in the preface of his commentary on Galatians:
3. Law and grace
It is an absolute and unique teaching in all the world, to teach people, through Christ, to live as if there were no law or wrath or punishment. In a sense, they do not exist any longer for the Christian, but only total grace and mercy for Christ’s sake. Once you are in Christ, the law is the greatest guide for your life, but until you have Christian righteousness, all the law can do is to show you how sinful and condemned you are. In fact, to those outside of Christian righteousness, the law needs to be expounded in all its force. Why? So that people who think they have power to be righteous before God will be humbled by the law and understand they are sinners.
Therefore we must be careful to use the law appropriately. If we used the law in order to be accepted by God through obedience, then Christian righteousness becomes mixed up with earned/moral righteousness in our minds. If we try to earn our righteousness by doing many good deeds, we actually do nothing. We neither please God through our works-righteousness nor do we honor the purpose for which the law was given. But if we first receive Christian righteousness, then we can use the law, not for our salvation, but for his honor and glory, and to lovingly show our gratitude.
4. Living the gospel
While we live here on earth, we will be accused, exercised with temptations, oppressed with heaviness and sorrow, and bruised by the law with its demands of active righteousness. Because of this, Paul sets out in this letter of Galatians to teach us, to comfort us, and to keep us constantly aware of this Christian righteousness. For if the truth of being justified by Christ alone (not by our works) is lost, then all Christian truths are lost. For there is no middle ground between Christian righteousness and works-righteousness. There is no other alternative to Christian righteousness but works-righteousness; if you do not build your confidence on the work of Christ, you must build your confidence on your own work. On this truth and only on this truth the church is built and has its being.
So learn to “speak the gospel” to one’s heart. For example, when the law creeps into your conscience, learn to be a cunning logician–learn to use arguments of the gospel against it. Say:
O law! You would climb up into the kingdom of my conscience, and there reign and condemn me for sin, and would take from me the joy of my heart which I have by faith in Christ, and drive me to desperation, that I might be without hope. You have overstepped your bounds. Know your place! You are a guide for my behavior, but you are not Savior and Lord of my heart. For I am baptized, and through the gospel am called to receive righteousness and eternal life….So trouble me not! For I will not allow you, so intolerable a tyrant and tormentor, to reign in my heart and conscience–for they are the seat and temple of Christ the Son of God, who is the king of righteousness and peace, and my most sweet savior and mediator. He shall keep my conscience joyful and quiet in the sound and pure doctrine of the gospel, through the knowledge of this passive and heavenly righteousness.
When we are assured of this righteousness, we not only cheerfully work well in our vocations, but we submit to all manner of burdens and dangers in this present life, because we know that this is the will of God, and that this obedience pleases him. This then is the argument of this Epistle, which Paul expounds against the false teachers who had darkened the Galatians’ understanding of this righteousness by faith.
