How apply OT law today?
Question 07042
The question of how Christians should apply Old Testament law sits at the heart of Christian discipleship and has divided sincere believers for centuries. Some argue the moral law remains binding while ceremonial and civil portions have been set aside. Others insist the believer is wholly free from the Mosaic Law in every part. The answer Scripture gives is more careful than either position assumes, and getting it right matters for how we read most of the Bible.
The Mosaic Law as a Covenantal Whole
The Mosaic Law was given to Israel at Sinai as the constitution of a theocratic nation. It came as a unit, not as a collection of separable categories. The traditional threefold division into moral, civil, and ceremonial law has pastoral usefulness for organising the material, but Scripture itself does not present the Law in this way. James writes that whoever keeps the whole law but stumbles in one point has become accountable for all of it (James 2:10). The Law functioned as a single covenantal package, given to one nation in one specific era of redemptive history.
This matters because the New Testament treats the Law as a unit when it speaks of its termination for the believer. Paul writes that Christ is the end of the law for righteousness to everyone who believes (Romans 10:4). The Law as tutor has done its work and brought us to Christ (Galatians 3:23-26). The ministry engraved on stones, glorious as it was, has been surpassed by the ministry of the Spirit (2 Corinthians 3:7-11). The first covenant is described as obsolete and ready to vanish away (Hebrews 8:13). The Mosaic Law came as a covenantal package and ends as a covenantal package.
What Continues for the Believer
What continues for the Christian is not any extracted portion of the Mosaic code but the moral character of God Himself. God’s holiness, justice, faithfulness, and love did not begin at Sinai. Genesis records moral accountability long before Moses received the tablets. Cain knew murder was wrong (Genesis 4). The generation of the flood was judged for wickedness (Genesis 6). Noah received commands about bloodshed and the image of God (Genesis 9). Abraham was called righteous on the basis of faith (Genesis 15:6). Sodom faced judgement for sin (Genesis 18-19). The patriarchs operated under moral expectations rooted in God’s character, not the Sinai covenant.
Paul makes the same point about the Gentiles in Romans 2:14-15, where the work of the law is written on their hearts. The moral substance to which the Mosaic Law gave covenantal expression for one nation is now written on the believer’s heart by the indwelling Spirit, fulfilling Jeremiah 31:33. The believer’s moral compass is not the Decalogue extracted from its covenantal context but the character of God expressed in Christ, taught by the apostles, and applied internally by the Spirit.
Reading the Old Testament Law as a Christian
How then should the Christian read Leviticus or Deuteronomy? Not as a code currently binding, but as profitable for teaching, reproof, correction, and training in righteousness (2 Timothy 3:16-17). Every page reveals something of who God is, what He values, and what He hates. The dietary laws teach holiness through separation. The sacrificial system points forward to Christ. The civil legislation reveals God’s concern for justice, the protection of the vulnerable, honest weights, fair courts, and the dignity of the poor. The festal calendar anticipates the work of the Messiah.
The believer reads these texts as the Word of God spoken to Israel under a covenant that has been fulfilled and superseded, but the God who gave them has not changed. His character shines through every commandment. The believer asks not “Am I obliged to keep this?” but “What does this reveal about the God I now serve through the law of Christ?”
The Law of Christ
The believer’s positive moral standard is described in the New Testament as the law of Christ (Galatians 6:2; 1 Corinthians 9:21), the royal law (James 2:8), the law of liberty (James 1:25), and the law of the Spirit of life (Romans 8:2). This is not a new external code but the moral character of God expressed in Christ, taught by the apostles, and applied internally by the Spirit. In substance it covers nine of the Decalogue’s provisions, often with greater depth than Sinai required, since Jesus pressed obedience inward to the heart rather than only outward to the act.
The Sabbath as a covenantal sign is released, as Colossians 2:16-17 and Romans 14:5-6 make clear. The believer who is not under the Mosaic Law is nonetheless not lawless. Cruciform love fulfils the whole (Romans 13:8-10; Galatians 5:14), and the Spirit applies the moral weight of God’s character to every situation the believer faces.
So, now what?
The Christian approaches the Old Testament law with reverence and profit, but not with obligation. Every commandment reveals the God who gave it, and every revelation of God shapes how we live now under the law of Christ. We are not under Moses, but we are not free from God. The Spirit who inspired the Law now writes its moral substance on hearts of flesh, and love fulfils what no external code could ever produce.
“For Christ is the end of the law for righteousness to everyone who believes.” Romans 10:4
