Understanding the Law vs. Living the New Covenant

What Changed Through Jesus Christ

One of the most important things a believer can understand about the Christian faith is the difference between living under the Old Covenant Law and living under the New Covenant established through Jesus Christ.

Many Christians understand that Jesus died for their sins, but there is sometimes confusion about what that means for how we are supposed to live today. Are we still under the Law of Moses? Are we required to keep the commandments in the same way Israel was required to keep them? Does living under grace mean that obedience is no longer necessary?

These are important questions because understanding the New Covenant changes how we view our relationship with God, our obedience, our righteousness, and our identity in Christ.

The central difference is this: Under the Old Covenant, God’s commandments were given to govern His covenant people through the Law of Moses. Under the New Covenant, believers are justified through faith in Jesus Christ and are empowered by the Holy Spirit to live in obedience from a transformed heart.

God’s standard of holiness has not changed, but the covenant through which we relate to Him has.

1. Living Under the Law: The Old Covenant

The Old Covenant was established when God brought the children of Israel out of Egypt and gave them His commandments through Moses at Mount Sinai.

God gave Israel the Law to establish how they were to live as His covenant people. It included moral commandments, ceremonial regulations, dietary instructions, sacrifices, and ordinances.

The Law revealed God’s holiness and established His expectations for His people.

In Exodus 20, God gave Moses the Ten Commandments. Throughout the books of Exodus, Leviticus, Numbers, and Deuteronomy, additional instructions were given concerning worship, sacrifices, relationships, cleanliness, and the nation’s religious and civil life.

Under this covenant, obedience was associated with blessings, while disobedience brought consequences.

Deuteronomy 28 describes the blessings that would follow obedience and the curses that would follow disobedience.

However, there was a limitation. Although the Law was holy, righteous, and good, it could not change the sinful condition of the human heart.

Romans 3:20 (KJV) says:

“For by the law is the knowledge of sin.”

The Law revealed sin. It showed humanity what God’s righteousness required, but it could not make sinful people righteous through their own ability to keep its commandments.

Hebrews 10:4 (KJV) explains:

“For it is not possible that the blood of bulls and of goats should take away sins.”

The sacrifices under the Old Covenant were temporary provisions that pointed forward to the perfect sacrifice of Jesus Christ.

The problem was never that God’s Law was imperfect. The problem was humanity’s inability to fulfill its righteous requirements perfectly.

The Law could expose sin, but it could not provide the permanent solution for sin that humanity needed.

2. The Promise of a New Covenant

Long before Jesus came into the world, God promised that He would establish a New Covenant with His people.

This promise is found in Jeremiah 31:31–34.

Jeremiah 31:31 (KJV) says:

“Behold, the days come, saith the LORD, that I will make a new covenant with the house of Israel, and with the house of Judah:”

Notice that God did not promise simply to renew the old arrangement. He specifically promised a New Covenant.

Jeremiah 31:33 (KJV) continues:

“But this shall be the covenant that I will make with the house of Israel; After those days, saith the LORD, I will put my law in their inward parts, and write it in their hearts; and will be their God, and they shall be my people.”

This is a significant difference.

Under the Old Covenant, God’s commandments were given on tablets of stone and through written ordinances. Under the New Covenant, God promised to write His law in the hearts and minds of His people.

The New Covenant would involve an inward transformation.

God was not removing His desire for righteousness. He was providing a new way for His people to live in relationship with Him.

Jesus Christ came to fulfill this promise.

At the Last Supper, Jesus identified His blood as the blood of the New Covenant.

Luke 22:20 (KJV) says:

“Likewise also the cup after supper, saying, This cup is the new testament in my blood, which is shed for you.”

The word “testament” in this passage refers to the covenant. Jesus established the New Covenant through His sacrificial death.

What the sacrifices under the Old Covenant could never accomplish permanently, Jesus accomplished through His own blood.

3. Living in the New Covenant: Righteousness Through Faith in Jesus Christ

One of the greatest differences between the Old and New Covenants is how righteousness is received.

Under the New Covenant, we are not justified by attempting to establish our own righteousness through the works of the Law. We are justified through faith in Jesus Christ.

Galatians 2:16 (KJV) says:

“Knowing that a man is not justified by the works of the law, but by the faith of Jesus Christ, even we have believed in Jesus Christ, that we might be justified by the faith of Christ, and not by the works of the law: for by the works of the law shall no flesh be justified.”

This is foundational to understanding the Gospel.

Our right standing with God is not something we earn through religious performance, perfect rule-keeping, or personal achievement.

It is received through Jesus Christ.

Ephesians 2:8–9 (KJV) says:

“For by grace are ye saved through faith; and that not of yourselves: it is the gift of God:

Not of works, lest any man should boast.”

Salvation is a gift of God’s grace.

We do not obey God to earn our salvation. We obey because we have received His grace and have been brought into a relationship with Him through Jesus Christ.

This changes the motivation behind obedience.

Instead of trying to earn God’s acceptance through religious performance, we live from the acceptance and righteousness we have received through Christ.

4. Does Living Under Grace Mean We No Longer Have to Obey God?

Absolutely not.

This is one of the most misunderstood aspects of the New Covenant.

Some people hear that Christians are no longer under the Law and conclude that obedience is no longer important. But Scripture does not teach that grace gives us permission to continue living in sin.

Romans 6:14 (KJV) says:

“For sin shall not have dominion over you: for ye are not under the law, but under grace.”

Notice what this verse actually says.

It does not say that sin no longer matters. It says that sin should no longer have dominion over us.

Grace is not permission to live contrary to God’s will. Grace is God’s provision for salvation and transformation.

Titus 2:11–12 (KJV) says:

“For the grace of God that bringeth salvation hath appeared to all men,

Teaching us that, denying ungodliness and worldly lusts, we should live soberly, righteously, and godly, in this present world;”

Grace teaches us to reject ungodliness and live righteously.

Under the New Covenant, obedience is not the price we pay to receive God’s love. It is the fruit of our relationship with Him.

Jesus Himself said in John 14:15 (KJV):

“If ye love me, keep my commandments.”

Our love for Christ should produce a desire to obey Him.

The difference is that obedience now flows from a heart being transformed by the Holy Spirit rather than merely attempting to satisfy an external system of regulations.

5. The Ministry of the Holy Spirit: From the Letter to the Spirit

One of the most important characteristics of the New Covenant is the ministry of the Holy Spirit.

Under the New Covenant, believers are not expected to live the Christian life through their own strength and ability.

God has given us His Spirit to guide, teach, convict, and empower us.

Romans 7:6 (KJV) says:

“But now we are delivered from the law, that being dead wherein we were held; that we should serve in newness of spirit, and not in the oldness of the letter.”

Notice the language: “newness of spirit.”

Paul is describing a different way of serving God.

The believer is no longer relating to God through the Old Covenant arrangement. Instead, we serve God through the life and power of the Holy Spirit.

2 Corinthians 3:6 (KJV) says:

“Who also hath made us able ministers of the new testament; not of the letter, but of the spirit: for the letter killeth, but the spirit giveth life.”

This does not mean that God’s written Word is bad or that Scripture should be ignored. Paul is contrasting the Old Covenant ministry of the letter, which brought condemnation to sinful humanity, with the New Covenant ministry of the Spirit, which brings life.

Romans 8:3–4 explains that what the Law could not accomplish because of the weakness of the flesh, God accomplished by sending His own Son.

Romans 8:4 (KJV) says:

“That the righteousness of the law might be fulfilled in us, who walk not after the flesh, but after the Spirit.”

The goal is not a life without obedience. The goal is a life in which God’s righteousness is expressed through people who are being led by His Spirit.

6. The Difference Between Religious Performance and New Covenant Obedience

There is a significant difference between obeying God because you are trying to earn His acceptance and obeying God because you love Him.

Consider what happens when a believer sins.

A person operating from a religious performance mindset may think:

• I have failed God, so now I must somehow earn His acceptance again.
• God will only love me if I can prove myself worthy.
• I need to perform enough religious activities to make up for my failure.
• My relationship with God depends entirely on how well I have performed.

But the New Covenant believer understands something different.

• I have sinned, and I need to acknowledge my sin.
• My righteousness is found in Jesus Christ, not in my own performance.
• I can approach God through Christ.
• I can confess my sin and receive forgiveness.
• The Holy Spirit can help me grow and overcome sinful behavior.
• I desire to obey God because I love Him.

First John 1:9 (KJV) says:

“If we confess our sins, he is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness.”

Hebrews 4:16 (KJV) says:

“Let us therefore come boldly unto the throne of grace, that we may obtain mercy, and find grace to help in time of need.”

This is the beauty of the New Covenant.

We do not run away from God when we fail. We come to Him through Jesus Christ, acknowledge our sin, receive His forgiveness, and depend on His grace to continue growing.

This does not minimize sin or remove accountability. It recognizes that Jesus is our mediator and that His sacrifice is sufficient.

There is no need to return to a system of religious performance to obtain what Christ has already provided.

7. Are Christians Still Supposed to Keep the Ten Commandments?

This is an important question because understanding the New Covenant does not mean dismissing everything God revealed through the Old Testament.

The New Testament continues to affirm God’s moral character and calls believers to holiness, love, faithfulness, and obedience.

However, Christians are not under the Mosaic Covenant as Israel was.

The New Testament teaches that believers are under the authority of Christ.

Galatians 3:24–25 (KJV) says:

“Wherefore the law was our schoolmaster to bring us unto Christ, that we might be justified by faith.

But after that faith is come, we are no longer under a schoolmaster.”

The Law served an important purpose in God’s redemptive plan. It revealed sin and pointed humanity toward the need for Christ.

Now that Christ has come, believers are not called to return to the Old Covenant system as the means of obtaining righteousness.

Instead, we are called to walk in the commandments of Christ.

Galatians 6:2 (KJV) says:

“Bear ye one another’s burdens, and so fulfil the law of Christ.”

And 1 Corinthians 9:21 (KJV) speaks of being:

“Under the law to Christ.”

The New Testament also teaches that love fulfills the moral purpose of God’s commandments.

Romans 13:10 (KJV) says:

“Love worketh no ill to his neighbor: therefore love is the fulfilling of the law.”

This means that New Covenant obedience is not about treating a list of regulations as a way to earn righteousness. It is about living in a way that reflects the character of Christ.

8. Understanding the Difference at a Glance

Living Under the Old Covenant Law	Living in the New Covenant
Covenant established through Moses	Covenant established through Jesus Christ
Written commandments and ordinances	God’s law written in the heart
Animal sacrifices	Christ’s once-for-all sacrifice
The Law reveals sin	Christ provides forgiveness and redemption
Righteousness pursued through Law observance	Righteousness received through faith
Old Covenant priesthood	Jesus as our eternal High Priest
External covenant regulations	Inward transformation through the Spirit
Service in the oldness of the letter	Service in newness of the Spirit

Hebrews 8:6 (KJV) summarizes the superiority of Christ’s ministry:

“But now hath he obtained a more excellent ministry, by how much also he is the mediator of a better covenant, which was established upon better promises.”

The New Covenant is not an invitation to disregard God’s holiness. It is the fulfillment of God’s redemptive plan through Jesus Christ.

9. The Heart of New Covenant Living: Christ Lives in You

Perhaps one of the most beautiful passages describing the New Covenant life is Galatians 2:20 (KJV):

“I am crucified with Christ: nevertheless I live; yet not I, but Christ liveth in me: and the life which I now live in the flesh I live by the faith of the Son of God, who loved me, and gave himself for me.”

This is the heart of the Christian life.

It is no longer about trying to establish our own righteousness through religious performance.

It is about living in union with Jesus Christ.

The believer has been crucified with Christ, raised to new life, and given the Holy Spirit.

We are called to depend on Christ, walk in the Spirit, grow in holiness, love others, and allow His life to be expressed through us.

The New Covenant is not simply a new set of religious rules. It is a new relationship with God through Jesus Christ.

Stop Trying to Earn What Jesus Has Already Provided

Understanding the difference between living under the Law and living in the New Covenant is essential to understanding the Gospel.

The Law revealed God’s holiness and exposed humanity’s sin. It showed us our need for a Savior.

Jesus came and fulfilled what humanity could not accomplish. Through His death and resurrection, He established the New Covenant, providing forgiveness, righteousness, reconciliation, and the gift of the Holy Spirit.

Now, we are not called to live under the Old Covenant system, attempting to earn righteousness through our own efforts.

We are called to live by faith in Jesus Christ.

Romans 8:1–2 (KJV) declares:

“There is therefore now no condemnation to them which are in Christ Jesus, who walk not after the flesh, but after the Spirit.

For the law of the Spirit of life in Christ Jesus hath made me free from the law of sin and death.”

This is the freedom of the New Covenant.

We are accepted through Christ, forgiven through Christ, made righteous through Christ, and empowered by His Spirit to live a life that pleases God.

We do not obey to become accepted. We obey because, through Jesus Christ, we have been brought into a relationship with God.

We do not live by the strength of our flesh, but by the power of His Spirit.

We do not put our confidence in our own righteousness, but in the finished work of Jesus Christ.

That is what it means to live in the New Covenant.

Not merely following the letter, but living in the newness of the Spirit. Not striving to earn righteousness, but walking by faith in the One who has become our righteousness.

“For the just shall live by faith.” — Romans 1:17 (KJV)

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