What Is the New Covenant?

What Is the New Covenant?

The New Covenant was promised long before Jesus went to the cross.

Jeremiah spoke of a day when God would establish a covenant unlike the one He made with Israel when He brought them out of Egypt. God would write His ways upon their hearts, He would be their God, and He would remember their sins no more (Jeremiah 31:31–34).

Hebrews takes that promise and points directly to Christ.

Jesus did not enter with the blood of goats and calves. He entered by His own blood and secured eternal redemption. Hebrews calls Him the mediator of the New Covenant because His death accomplished what the sacrifices of the first covenant could never finally accomplish (Hebrews 9:11–15).

This is one of the great differences between the covenants. The first covenant repeatedly pointed to the problem of sin through sacrifices, priests, regulations, and reminders. Christ dealt with that problem decisively.

Hebrews later says that Christ offered one sacrifice for sins and sat down at the right hand of God. His work was not waiting for another sacrifice to complete it. Where sins have been forgiven, “there is no longer any offering for sin” (Hebrews 10:11–18).

The New Covenant therefore begins with what God has done in Christ, not with what we promise to do for God.

That is the foundation of grace.

When Did the New Covenant Begin?

This is where Hebrews 9 becomes especially important.

Jesus spoke about the New Covenant before His death. At the Last Supper He described the cup as “the new covenant in my blood” (Luke 22:20). But Hebrews explains why His blood matters: a covenant associated with a death does not take effect while the one who made it is still living. Hebrews points us to the death of Christ as the decisive covenant event (Hebrews 9:15–17).

That means simply turning from Malachi to Matthew does not automatically move us from the Old Covenant into the New.

Jesus was born under the Law (Galatians 4:4–5). During His earthly ministry, He spoke to people living before His death, resurrection, and the outpouring of the Spirit. He was fulfilling the Law and moving history toward the cross.

That is why the cross is such an important dividing line when we read Scripture.

This does not make the teachings of Jesus before the cross unimportant. Far from it. It helps us understand what He was doing.

Jesus revealed the holiness of God, exposed the impossibility of self-righteousness, confronted hypocrisy, fulfilled what had been written, and prepared His followers for what He would accomplish.

Even His disciples did not yet understand what was about to happen. Jesus told them plainly that He would be killed and rise again, yet Luke says that they “understood none of these things” (Luke 18:31–34). After the resurrection, Jesus opened their minds to understand the Scriptures (Luke 24:44–45), and He had already promised that the Holy Spirit would teach them and bring His words to remembrance (John 14:26).

They were living through the transition before they fully understood it.

We read from the other side of the cross.

Why the Cross Changes How We Read Jesus

Consider the Sermon on the Mount.

Jesus said that unless a person’s righteousness exceeded that of the scribes and Pharisees, he would never enter the kingdom of heaven (Matthew 5:20). Later He said, “You therefore must be perfect, as your heavenly Father is perfect” (Matthew 5:48).

Those are not small improvements to a religious checklist.

They expose the insufficiency of outward righteousness.

Just before these statements, Jesus said He had not come to abolish the Law or the Prophets, but to fulfill them (Matthew 5:17). He did what no one else could do.

This covenant context also helps with difficult passages about forgiveness.

In Matthew 6:14–15, Jesus warned that if people did not forgive others, their Father would not forgive them. If we remove those words from their place before the cross and turn them into the operating principle of New Covenant forgiveness, we can easily conclude that God’s forgiveness rises and falls with our performance.

But listen to the language after the cross.

Paul tells believers to forgive one another “as God in Christ forgave you” (Ephesians 4:32).

The direction has changed.

We are not forgiving others in order to persuade God to forgive us. We forgive from the forgiveness we have already received in Christ.

That difference between law and grace becomes much clearer when the cross remains in view. This is the same covenant-context issue explored more fully in Don’t Sleepwalk Through Christian Life.

Forgiven Once for All

Hebrews does not describe Christ’s sacrifice as the beginning of another cycle.

It describes something finished.

The priests under the first covenant stood daily offering sacrifices that could never finally take away sins. Christ offered one sacrifice for sins and sat down (Hebrews 10:11–14).

Then Hebrews returns to the New Covenant promise:

God will remember their sins and lawless deeds no more.

And then comes the line that matters greatly for this discussion:

“Where there is forgiveness of these, there is no longer any offering for sin” (Hebrews 10:18).

This raises an important question: if Christ has dealt with sin, what are we trying to add to His sacrifice?

Sin still matters. Sin can hurt us and other people. We can grieve the Holy Spirit (Ephesians 4:30). We can think wrongly, behave destructively, and need our minds brought back to truth.

But none of those things require another sacrifice.

The answer is not to rebuild a system in which we repeatedly try to regain what Christ has already secured. The answer is to return in our thinking to the gospel.

Colossians says that God made us alive with Christ and forgave us all our trespasses, canceling the record of debt that stood against us (Colossians 2:13–14).

Grace gives us somewhere solid to stand while God renews our thinking and teaches us to live from what is already true.

What About “Backsliding”?

This also raises the common idea of a Christian “backsliding.”

Usually we picture someone who once behaved well, began behaving badly, and therefore slid backward spiritually.

But that way of thinking can quietly turn our spiritual standing into a measurement of performance.

Paul gives us another kind of warning in Galatians.

The Galatians had begun by the Spirit, yet they were being persuaded to return to a system of law and fleshly effort. Paul asks them, “Having begun by the Spirit, are you now being perfected by the flesh?” (Galatians 3:3).

Later he tells those who were seeking justification through the Law that they had “fallen away from grace” (Galatians 5:4).

Notice the context. Their problem was not that they had stopped trying to be good.

They were adding religious requirements to Christ.

That is a very different picture of falling from grace than many of us were taught.

Grace is not permission to stop caring about how we live. Grace changes the source from which we live. The Law exposes sin, but it cannot give life. Paul even says that the Law came in so that the trespass would increase, while grace abounded all the more (Romans 5:20).

The Christian answer to sin is therefore not “try harder so God will accept you again.”

It is to remember the gospel.

Peter describes believers who fail to grow in the qualities he lists as having forgotten that they were cleansed from their former sins (2 Peter 1:5–9). The problem he describes is forgetfulness, not a need for Christ to repeat His sacrifice.

We do not need less grace when we fail.

We need to remember the grace we have forgotten.

Christ Living in Us

The New Covenant does more than change our legal standing.

God gives life.

Paul describes the Christian life in words that leave little room for self-sufficiency: “It is no longer I who live, but Christ who lives in me” (Galatians 2:20).

He tells the Romans that the Spirit of God dwells in believers and that the Spirit who raised Jesus from the dead gives life (Romans 8:9–11).

That brings us back to the heart of the New Covenant.

We are not trying to become acceptable enough for God to come near. God has acted in Christ. He has forgiven, reconciled, given life, and placed His Spirit within His people.

Fruit still matters, but fruit does not grow because a branch strains hard enough to manufacture it. Life produces fruit.

That is why self-effort can never become the Christian substitute for the Law.

When we begin adding our own rules to determine whether we are right with God, we can create a new religious system that functions much like the old one. It becomes Jesus plus our performance, Jesus plus our consistency, Jesus plus our ability to maintain what He began.

The gospel keeps returning us to Christ.

He is enough.

Understanding the New Covenant gives us a framework for reading the whole Bible without flattening every passage into the same covenant setting. We can hear the demands of the Law in their full seriousness. We can hear the words of Jesus in the setting in which He spoke them. We can see the cross as the fulfillment toward which those Scriptures were moving.

This is also why our identity in Christ is more than a position. The New Covenant does not merely describe something recorded about us at a distance. It includes the life of Christ within His people.

And from this side of the cross, we can hear the good news clearly:

Christ has offered the sacrifice.

Christ has secured redemption.

Christ has brought forgiveness.

Christ has given life.

The New Covenant does not leave us trying to finish His work.

It invites us to live from the work He finished.