In what sense does the Mosaic law still speak to Christians today?

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Question 01166

If the Mosaic Law has ended for the believer as a covenant, the question naturally follows: in what sense does it still speak? Christians do not ignore Leviticus or treat the Decalogue as cultural artefact. The Old Testament law continues to address the church, but the manner in which it speaks is different from the manner in which it once bound Israel.

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The Law as Witness to God’s Character

The Mosaic Law was always more than a list of regulations. It was a revelation of who God is. His holiness shines through the requirements for separation, His justice through the principles of restitution, His mercy through the provisions for the poor and the stranger, His faithfulness through the structure of covenant blessing and curse. None of this character has changed. The God who spoke at Sinai is the same God who speaks through the apostles, and the moral substance the Law expressed for Israel now binds the believer through the law of Christ.

When the Christian reads the prohibition against bearing false witness, the substance of that command speaks with full force, not because Exodus 20 still binds the believer covenantally, but because honesty belongs to the character of God, is reissued repeatedly in the New Testament, and is written on the believer’s heart by the Spirit. The Old Testament law speaks because the God behind it speaks.

The Law as Tutor That Has Done Its Work

Paul describes the Law as a tutor (paidagogos) that brought us to Christ (Galatians 3:24). The pedagogue’s role was to escort the child until maturity, then step aside. The Law performed this function by exposing sin, demonstrating human inability to achieve righteousness through performance, and pointing forward to the One who would fulfil what the Law required. Romans 3:20 states it plainly: through the law comes knowledge of sin. The Law continues to perform this exposing function for the unbeliever, since apart from Christ the Law’s verdict is the verdict every human being faces.

For the believer, the tutor has done its work. The Christian no longer relates to the Law as a means of justification or as a covenantal obligation. But the Law’s testimony to the holiness of God and the seriousness of sin remains pastorally and theologically valuable. We do not graduate from understanding what righteousness looks like; we simply receive the verdict on our own behalf in Christ rather than in our own works.

The Law as Type and Shadow

Hebrews describes the Mosaic ceremonial system as a shadow of the good things to come, not the true form of these realities (Hebrews 10:1). The sacrificial system, the priesthood, the tabernacle, the festal calendar, the dietary laws, and the purity regulations all pointed forward to Christ and have found their fulfilment in Him. The believer reads Leviticus and sees Calvary in advance. The Day of Atonement teaches the doctrine of substitution. The scapegoat displays the removal of sin. Passover points to the Lamb of God.

This is one of the most profitable ways the Old Testament law continues to speak to the Christian. Every offering, every priestly garment, every detail of tabernacle furniture has theological significance illumined by the New Testament. The Law speaks Christologically, pointing past itself to the One it always anticipated.

The Law as Wisdom for Civic Justice

The civil legislation of the Mosaic Law was the constitutional code of one theocratic nation in one historical context. It does not transfer directly to any modern state, and the church is not Israel and has no civil jurisdiction. The principles embedded within those civil provisions, however, retain wisdom that any society would do well to consider. Honest weights and measures (Leviticus 19:35-36), care for the vulnerable (Exodus 22:21-27), the integrity of courts (Deuteronomy 16:18-20), the protection of the innocent (Deuteronomy 19:15-21), the dignity of labour (Leviticus 19:13) — these reflect God’s character as the just Judge of all the earth.

The Christian engaging political and social questions does not bind contemporary nations to the Mosaic civil code, but neither dismisses the wisdom embedded within it. The principles of righteousness that Israel was called to embody are principles God commends to all peoples, even though the specific legislation belonged to one nation in one era.

The Law as Worship and Devotion

The Psalms repeatedly celebrate the Law as delight, light, sweetness, and treasure (Psalm 19:7-11; Psalm 119). This devotional posture is not contradicted by recognising that the Mosaic Law as covenant has ended for the believer. The psalmist celebrates the revelation of God’s character, the gift of His Word, the privilege of being addressed by the living God. The Christian reads Psalm 119 and applies its devotion to the whole counsel of God now possessed in Christ and the completed Scripture, including the Old Testament law as profitable revelation.

So, now what?

The Old Testament law speaks to the Christian as Scripture, as revelation of God’s unchanging character, as testimony to the seriousness of sin, as type pointing to Christ, as wisdom for justice, and as material for devotion. What it does not do is bind the believer covenantally. The Christian reads Moses with profit and reverence, learns from him about the God who gave the Law, sees Christ on every page, and lives now under the law of Christ written on the heart by the indwelling Spirit.

“All Scripture is breathed out by God and profitable for teaching, for reproof, for correction, and for training in righteousness.” 2 Timothy 3:16