Why the Law Can Never Save You—But Jesus Can

Part 2 of The Ten Commandments: God’s X-Ray of the Human Heart

“Therefore by the deeds of the law there shall no flesh be justified in his sight.” — Romans 3:20

The Law is holy.

The Law is righteous.

The Law is good.

But the Law cannot save you.

That statement may sound strange because the Ten Commandments came from God. Yet Scripture makes it clear that God never gave the Law as a ladder by which sinful man could climb into heaven.

The Law was given to reveal sin, define righteousness, silence human excuses, and lead sinners to Jesus Christ.

It can diagnose the problem, but it cannot provide the cure.

The Law Reveals the Standard

Many people believe they will be accepted by God because they have tried to live a good life.

They say:

“I have never killed anyone.”

“I try to treat people right.”

“I go to church.”

“I give to others.”

“I am not as bad as some people.”

But God does not measure us by comparing us with other people. He measures us by His own perfect holiness.

The question is not whether you are better than your neighbor.

The question is whether you have perfectly loved God with all your heart, soul, mind, and strength, and whether you have perfectly loved your neighbor as yourself.

Jesus said:

“Thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy mind… Thou shalt love thy neighbour as thyself.”— Matthew 22:37–39

These two commandments summarize the entire Law.

Every sin is ultimately a failure to love God properly, love others properly, or both.

The Problem Is Not With the Law

The Law is not defective.

We are.

Paul writes:

“Wherefore the law is holy, and the commandment holy, and just, and good.”— Romans 7:12

The Law is like a perfectly straight ruler placed beside a crooked line. The ruler does not make the line crooked. It merely reveals how crooked the line already is.

The Law exposes the condition of the human heart.

It reveals pride, selfishness, lust, hatred, greed, rebellion, deceit, and idolatry.

It shows us that sin is not merely something we do occasionally. Sin has affected our nature.

Jesus said:

“For from within, out of the heart of men, proceed evil thoughts, adulteries, fornications, murders, thefts, covetousness, wickedness, deceit…”— Mark 7:21–22

The problem comes from within.

That is why outward religious reform is never enough.

Good Works Cannot Erase Guilt

Imagine a man standing before a judge after committing a serious crime.

He says:

“Judge, I know I broke the law, but I have also done many good things. I help my neighbors, I love my family, and I give money to charity.”

A righteous judge would still have to deal with the crime.

Good deeds do not erase guilt.

In the same way, no amount of future obedience can erase the sins of the past.

You cannot undo a lie by telling the truth tomorrow.

You cannot erase theft by becoming generous later.

You cannot cancel hatred by performing religious works.

The debt of sin must be paid.

Scripture says:

“The wages of sin is death.”— Romans 6:23

Sin earns judgment.

That is the terrible seriousness of our condition.

Religion Cannot Change the Heart

Religion can modify behavior.

It can teach discipline.

It can create routines.

It can make a person appear respectable.

But religion alone cannot produce a new heart.

The Pharisees in Jesus’ day were religious, disciplined, knowledgeable, and respected. Yet Jesus said they were like graves that appeared beautiful outwardly but were filled with corruption inwardly.

“For ye are like unto whited sepulchres, which indeed appear beautiful outward, but are within full of dead men’s bones.”— Matthew 23:27

The greatest danger is not open wickedness alone.

It is hidden wickedness covered by religion.

A person can attend church, carry a Bible, sing worship songs, and still remain unconverted.

That is why Jesus said:

“Ye must be born again.”— John 3:7

The Law Brings Us to the End of Ourselves

The Law has done its work when a person stops defending himself.

As long as we believe we can save ourselves, we will not fully trust the Savior.

As long as we think we are righteous enough, we will not hunger for the righteousness of Christ.

Paul described the purpose of the Law this way:

“That every mouth may be stopped, and all the world may become guilty before God.”— Romans 3:19

The Law shuts the mouth of self-righteousness.

It silences every excuse.

It removes every boast.

It brings rich and poor, religious and irreligious, educated and uneducated, moral and immoral to the same conclusion:

We have sinned.

We are guilty.

We need a Savior.

Jesus Fulfilled What the Law Demanded

This is where the Gospel begins to shine.

Jesus Christ did what none of us could do.

He perfectly obeyed God.

He never lied.

He never stole.

He never lusted.

He never hated.

He never coveted.

He never dishonored the Father.

He loved God perfectly and loved others perfectly.

Jesus did not come to destroy the Law.

He said:

“I am not come to destroy, but to fulfil.”— Matthew 5:17

He fulfilled the Law through His perfect life.

Then, although He was innocent, He went to the cross and bore the punishment that guilty sinners deserved.

“For he hath made him to be sin for us, who knew no sin; that we might be made the righteousness of God in him.”— 2 Corinthians 5:21

This is the great exchange of the Gospel.

Christ took our guilt.

Believers receive His righteousness.

He took our condemnation.

We receive His acceptance.

He took our death.

We receive His life.

Salvation Is a Gift

You cannot earn salvation.

You cannot purchase it.

You cannot work long enough to deserve it.

Salvation comes by grace through faith.

“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.”— Ephesians 2:8–9

Grace means God gives us what we do not deserve.

Mercy means God does not give us the judgment we do deserve.

The Gospel is not God helping good people become better.

The Gospel is God raising spiritually dead sinners into new life through Jesus Christ.

Repent and Believe

The proper response to the Gospel is repentance and faith.

Jesus preached:

“Repent ye, and believe the gospel.”— Mark 1:15

Repentance is not merely feeling sorry.

It is a change of mind and heart toward God and sin.

It is agreeing with God about your condition.

It is turning away from self-rule and surrendering to Jesus Christ as Lord.

Faith is not merely believing that Jesus existed.

Faith is trusting Him completely.

It is resting your eternal future upon His finished work.

The Law Cannot Save, But It Can Point

The Law cannot forgive you.

But it can show you that you need forgiveness.

The Law cannot cleanse you.

But it can expose the stain.

The Law cannot give life.

But it can lead you to the One who said:

“I am the way, the truth, and the life.”— John 14:6

Do not use the Law as a ladder to climb toward God.

Allow it to become a signpost pointing you to Christ.

Stop trusting in your goodness.

Stop comparing yourself with others.

Stop hiding behind religion.

Come honestly before God.

Confess your sin.

Place your faith in Jesus Christ.

He did not come for people who believe they are already righteous.

He came to save sinners.

In Part 3, we will see that salvation is more than forgiveness alone. God does not merely erase the record of sin. Through the new birth, He changes the sinner from within and gives him a brand-new life.