"But before faith came, we were kept in custody under the law, being shut up to the faith which was later to be revealed. Therefore the Law has become our tutor to lead us to Christ, so that we may be justified by faith. But now that faith has come, we are no longer under a tutor. For you are all sons of God through faith in Christ Jesus. For all of you who were baptized into Christ have clothed yourselves with Christ. There is neither Jew nor Greek, there is neither slave nor free man, there is neither male nor female; for you are all one in Christ Jesus. And if you belong to Christ, then you are Abraham’s descendants, heirs according to promise."
We could discuss this passage in relation to the age-old question of how the OT law applies to the NT believer...a question that Christians answer in a variety of ways. But I want to focus on some teaching from Luther that I think just about everybody can agree on. His own perspective, though often rather unclear, was probably more on the "discontinuity" end of the spectrum, meaning that he believed much of the OT law was not binding on the NT believer. But because he extrapolates his application of the text to the principle of law, which includes even the commands of the NT, what he says about it also works for those who hold more of a "continuity" approach. More importantly, though, his words ring true to the practical experience that all true believers have in our relationship with the Lord, and what should happen in the hearts of those who don't know him yet...
We know that Paul has reference to the time of Christ's coming. It was then that faith and the object of faith were fully revealed. But we may apply the historical fact to our inner life. When Christ came He abolished the Law and brought liberty and life to light. This He continues to do in the hearts of the believers. The Christian has a body in whose members, as Paul says, sin dwells and wars. I take sin to mean not only the deed but root, tree, fruit, and all. A Christian may perhaps not fall into the gross sins of murder, adultery, theft, but he is not free from impatience, complaints, hatreds, and blasphemy of God. As carnal lust is strong in a young man, in a man of full age the desire for glory, and in an old man covetousness, so impatience, doubt, and hatred of God often prevail in the hearts of sincere Christians. Examples of these sins may be garnered from the Psalms, Job, Jeremiah, and all the Sacred Scriptures.
Accordingly each Christian continues to experience in his heart times of the Law and times of the Gospel. The times of the Law are discernible by heaviness of heart, by a lively sense of sin, and a feeling of despair brought on by the Law. These periods of the Law will come again and again as long as we live. To mention my own case. There are many times when I find fault with God and am impatient with Him. The wrath and the judgment of God displease me, my wrath and impatience displease Him. Then is the season of the Law, when "the flesh lusteth against the Spirit, and the Spirit against the flesh."
The time of grace returns when the heart is enlivened by the promise of God's mercy. It soliloquizes: "Why art thou cast down, O my soul? and why art thou disquieted within me? Can you see nothing but law, sin, death, and hell? Is there no grace, no forgiveness, no joy, peace, life, heaven, no Christ and God? Trouble me no more, my soul. Hope in God who has not spared His own dear Son but has given Him into death for thy sins." When the Law carries things too far, say: "Mister Law, you are not the whole show. There are other and better things than you. They tell me to trust in the Lord."
There is a time for the Law and a time for grace. Let us study to be good timekeepers. It is not easy. Law and grace may be miles apart in essence, but in the heart, they are pretty close together. In the heart fear and trust, sin and grace, Law and Gospel cross paths continually.
Luther describes the same dynamic of the law and gospel "crossing paths" when he comments on the famous verse that says "the Law has become our tutor to lead us to Christ, so that we may be justified by faith"...
Teachers are indispensable, otherwise the children would grow up without discipline, instruction, and training. But how long are the scolding and the whippings of the schoolmaster to continue? Only for a time, until the boy has been trained to be a worthy heir of his father. No father wants his son to be whipped all the time. The discipline is to last until the boy has been trained to be his father's worthy successor.
When a person feels the full force of the Law he is likely to think: I have transgressed all the commandments of God; I am guilty of eternal death. If God will spare me I will change and live right from now on. This natural but entirely wrong reaction to the Law has bred the many ceremonies and works devised to earn grace and remission of sins.
The best the Law can do for us is to prepare us for a new birth through faith in Christ Jesus. Faith in Christ regenerates us into the children of God. St. John bears witness to this in his Gospel: "As many as received him, to them gave he power to become the sons of God, even to them that believe on his name." (John 1:12.) What tongue of man or angel can adequately extol the mercy of God toward us miserable sinners in that He adopted us for His own children and fellow-heirs with His Son by the simple means of faith in Christ Jesus!
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