Do Christians Have to Keep the Old Testament Law?

Christians often encounter Old Testament commands and wonder what to do with them.

Should Christians observe dietary restrictions? Keep the Sabbath on Saturday? Follow Israel’s civil penalties? Offer sacrifices? Receive circumcision? Obey the Ten Commandments? Tithe? Avoid mixed fabrics?

The answer requires more than dividing commands into those we like and those we do not.

Christians are not under the Mosaic covenant as the basis of their relationship with God. Jesus fulfilled the law and established the new covenant. Yet the Old Testament law remains inspired Scripture and continues to reveal God’s character, expose sin, teach wisdom, and guide believers through its fulfillment in Christ.

The Christian is not justified by law-keeping but is called to a holy life shaped by love and the Holy Spirit.

What Is “the Law”?

The word law can refer to several things in Scripture:

• the five books of Moses
• the entire Old Testament
• specific commandments
• the Mosaic covenant
• a principle operating within human life
• God’s moral will

Context determines the meaning.

When Paul says believers are not “under law,” he often refers to the Mosaic covenant as a governing and condemning administration, especially when law is used as the basis of justification.

He is not claiming that Christians have no moral obligations.

The Law Was Good

The law came from God.

It revealed His holiness, ordered Israel’s worship and community, restrained evil, exposed sin, protected vulnerable people, and distinguished Israel among the nations.

Paul calls the law holy, righteous, and good.

The problem was not a defect in God’s law. The problem was sinful humanity.

A command can reveal what is right without giving a rebellious heart the power to obey.

The law diagnoses sin but cannot by itself regenerate the sinner.

The Law and the Covenant with Israel

The Mosaic law belonged to God’s covenant with Israel after the exodus.

It shaped Israel as:

• a worshiping people
• a nation
• a priestly kingdom
• a covenant community awaiting fulfillment

Its commands included sacrifices, priesthood, food laws, purity regulations, festivals, civil judgments, and moral instruction.

Christians must read these commands within that historical and covenantal setting.

The church is not the geopolitical nation of ancient Israel, and Christians do not live under the Mosaic covenant in the same form.

Jesus Fulfilled the Law

Jesus said He did not come to abolish the Law and the Prophets but to fulfill them.

Fulfillment includes several dimensions.

Jesus:

• obeyed God perfectly
• fulfilled messianic promises
• embodied the law’s true righteousness
• completed the sacrificial system through His death
• became the true temple
• established the promised new covenant
• bore the law’s curse for sinners
• revealed the law’s intended goal

Fulfillment does not mean the Old Testament becomes meaningless.

It means every law must now be understood in relation to Christ.

The New Covenant

The prophets promised a new covenant marked by forgiveness, transformed hearts, knowledge of God, and the gift of the Spirit.

Jesus inaugurated this covenant through His blood.

Hebrews explains that a new covenant makes the former covenant obsolete as a covenantal administration.

Christians therefore do not return to the Mosaic system for access to God.

There is no continuing animal sacrifice because Christ offered Himself once for all. There is no earthly priesthood mediating salvation because Jesus is the great High Priest. There is no temple requirement because God’s people are joined to Christ and indwelt by the Spirit.

Justification Is Not by the Law

The law cannot justify sinners.

Justification is God’s declaration that a person is righteous because of Christ, received through faith.

Circumcision, dietary practice, Sabbath observance, and moral effort cannot establish that verdict.

Paul’s opposition to “works of the law” was not opposition to obedience. It was opposition to using the law as the means of obtaining righteous status or defining Gentile believers as second-class members of God’s family.

Grace excludes boasting.

Acts 15 and Gentile Believers

The early church directly faced the question of whether Gentile converts needed circumcision and the law of Moses.

The Jerusalem council rejected that requirement.

Gentiles were not required to become Jews in order to follow Israel’s Messiah.

The council did provide instructions addressing idolatry, sexual immorality, blood, and table fellowship. These helped preserve holiness and unity in mixed Jewish-Gentile communities.

Acts 15 confirms that the Mosaic covenant was not imposed upon Gentile believers as the condition of salvation.

Moral, Ceremonial, and Civil Laws

Christians have often grouped Old Testament laws into three categories:

• moral
• ceremonial
• civil

This framework can be useful, but the Bible does not always divide laws neatly under those labels.

The categories should be used as interpretive aids rather than as though Moses included three separate legal codes.

Ceremonial laws involving sacrifice, priesthood, purity, and festivals find fulfillment in Christ.

Civil laws governed Israel as an ancient nation and reveal principles of justice without functioning as the church’s criminal code.

Moral commands reflect God’s character and are frequently reaffirmed in the New Testament.

The central question is not merely which category a command fits. It is how that command relates to Christ, the new covenant, and apostolic teaching.

The Ten Commandments

The Ten Commandments summarize central covenant obligations and reveal enduring moral truth.

The New Testament reaffirms commands against idolatry, dishonoring parents, murder, adultery, theft, falsehood, and coveting.

Christians obey these not as a means of justification but as expressions of love and holiness under Christ’s lordship.

The Sabbath command requires special discussion because the New Testament treats days with greater freedom than other commands.

Faithful Christians disagree about whether one day remains morally required or whether the Sabbath is fulfilled in Christ and expressed through worship and rest without binding one particular day.

Whatever position is taken, believers should gather with the church and receive rest as God’s gift.

Food and Purity Laws

Old Testament food and purity laws taught Israel about holiness, distinction, life, death, and access to worship.

Jesus and the apostles teach that these boundary markers do not continue as requirements for the new-covenant people.

Foods do not make a person spiritually clean or unclean. Jewish and Gentile believers share one table in Christ.

The principles remain instructive, but the regulations are not imposed in their former covenantal form.

Civil Penalties

Israel’s law included penalties administered within a covenant nation.

The church is not authorized to reproduce Israel’s state structure or impose those penalties.

The New Testament distinguishes the church’s spiritual discipline from the government’s civil authority.

Old Testament civil laws can still teach principles such as:

• proportional justice
• protection of the vulnerable
• restitution
• truthful testimony
• responsibility
• concern for property and life

Application requires wisdom within modern legal and social contexts.

Love Fulfills the Law

Jesus summarized the law through love for God and love for neighbor.

Paul says love fulfills the law.

Love is not a replacement that lowers moral expectations. It captures the heart toward which the commandments point.

A person who truly loves a neighbor will not murder, exploit, commit adultery, steal, deceive, or covet that neighbor’s goods.

Biblical love is not mere emotion. It seeks another’s genuine good according to God’s truth.

The “law of love” therefore does not permit people to redefine right and wrong according to preference.

The Law of Christ

Paul speaks of bearing one another’s burdens and fulfilling the law of Christ.

Christians live under Jesus’ authority.

His law includes:

• His teaching
• the moral witness of Scripture
• apostolic instruction
• the command to love
• life directed by the Spirit

The law of Christ does not create a lawless Christianity. It places obedience within the new covenant and the example of the crucified Lord.

Life in the Spirit

The Spirit writes God’s will upon the heart and produces fruit.

Christians do not obey merely through external pressure. The Spirit changes desires and empowers action.

This does not eliminate commands. The New Testament contains many commands.

It changes the source and context of obedience.

Believers obey:

• from acceptance rather than for acceptance
• by the Spirit rather than self-reliance
• as children rather than condemned slaves
• through love rather than status-seeking
• in union with Christ

Does Grace Mean Christians May Live as They Please?

No.

Grace liberates people from sin’s dominion, not for sin’s service.

Paul strongly opposes both legalism and lawlessness.

Legalism tries to earn God’s favor through performance.

Lawlessness treats grace as permission to ignore God.

The Gospel produces grateful obedience. Those united to Christ are called to put sin to death and walk in newness of life.

How to Read an Old Testament Law

When encountering a command, ask:

1. What did this law mean within Israel’s covenant?
2. What aspect of God’s character does it reveal?
3. What human good or danger does it address?
4. How is it fulfilled in Christ?
5. Does the New Testament reaffirm, transform, or set aside its covenantal form?
6. What enduring principle remains?
7. How should that principle be expressed through love today?

This method avoids both wooden repetition and careless dismissal.

Christians and the Old Testament

Christians should read the law because it:

• reveals God’s holiness
• exposes sin
• explains the cross
• teaches justice and wisdom
• provides the background of Jesus’ mission
• shows the shape of covenant faithfulness
• trains believers in righteousness

The law remains God’s Word even when a command is not directly binding in its original form.

Free to Obey

Christians do not keep the Old Testament law to earn salvation.

They are saved by grace through faith in Christ.

That same grace produces a transformed heart that loves God’s will.

The Christian relationship to law can therefore be summarized:

• not under the Mosaic covenant
• not justified by works
• instructed by the whole of Scripture
• ruled by Christ
• empowered by the Spirit
• obligated to love
• called to holiness

Freedom in Christ is not freedom from God. It is freedom to belong to Him and increasingly reflect His character.