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ONE GOSPEL, TWO LETTERS
The Shared Message of Romans and Galatians

Paul wrote Galatians in heat. Teachers had entered the churches and insisted that Gentile believers must take on works of the law, especially circumcision, in order to belong fully to the people of God. Paul calls that message “a different gospel—which is really no gospel at all” (Galatians 1:6–7). His answer is fierce: Christ plus anything is Christ emptied of meaning.

Romans was written later, to a church Paul had not founded. Jewish and Gentile believers needed a shared account of the gospel. The tone is calmer, but the spine is the same. Paul is “not ashamed of the gospel, because it is the power of God that brings salvation to everyone who believes: first to the Jew, then to the Gentile” (Romans 1:16).
For in the gospel the righteousness of God is revealed—a righteousness that is by faith from first to last, just as it is written: “The righteous will live by faith.” (Romans 1:17, NIV)

That same line from Habakkuk 2:4 appears in Galatians 3:11. Both letters announce a righteousness God himself provides, received by faith. Both refuse to let the law become a second savior. The kinship of the letters is therefore not a curiosity of style. It is the same gospel spoken to a church under pressure and to a church in need of unity.

Justification by Faith, Apart from Works of the Law

In both letters Paul states, almost in the same words, that a person is not put right with God by the works of the law.
…know that a person is not justified by the works of the law, but by faith in Jesus Christ. So we, too, have put our faith in Christ Jesus that we may be justified by faith in Christ and not by the works of the law, because by the works of the law no one will be justified. (Galatians 2:16, NIV)

For we maintain that a person is justified by faith apart from the works of the law. (Romans 3:28, NIV)

“Justified” is courtroom language. God declares the sinner righteous because he credits the righteousness that comes through Jesus Christ. Romans 3:20 and Galatians 2:16 close the same door: no one will be declared righteous by the works of the law.

Romans supplies the wide frame. “There is no difference between Jew and Gentile, for all have sinned and fall short of the glory of God, and all are justified freely by his grace through the redemption that came by Christ Jesus” (Romans 3:22–24). Galatians supplies the pastoral edge. If righteousness could be gained through the law, “Christ died for nothing” (Galatians 2:21). The letters guard one gift: grace received by faith. Both also exclude boasting. “Where, then, is boasting? It is excluded” (Romans 3:27). A gospel of works produces comparison. A gospel of grace produces gratitude.

Abraham: The Father of All Who Believe

Only in Romans and Galatians does Paul give Abraham a major role, as his chief witness that God has always put people right by faith.

What does Scripture say? “Abraham believed God, and it was credited to him as righteousness.” (Romans 4:3, NIV)

So also Abraham “believed God, and it was credited to him as righteousness.” (Galatians 3:6, NIV)

Both letters quote Genesis 15:6 as the pattern, not the exception. Abraham trusted God’s promise before circumcision and long before Sinai. In Romans 4 he is father of the circumcised who walk in faith and of the uncircumcised who believe as he did. In Galatians 3 “those who have faith are children of Abraham,” and Scripture “announced the gospel in advance to Abraham: ‘All nations will be blessed through you’” (Galatians 3:7–8).

The promise comes by faith so that it may be by grace. Romans 4:16 says this outright: “Therefore, the promise comes by faith, so that it may be by grace and may be guaranteed to all Abraham’s offspring.” Galatians 3:14 says it in missionary language: Christ redeemed us “in order that the blessing given to Abraham might come to the Gentiles through Christ Jesus, so that by faith we might receive the promise of the Spirit.” Romans 4:5 interprets both letters: God “justifies the ungodly.” Abraham is not a hero who earned a contract. He is an ungodly man who believed God. That is why he can be the father of Gentile sinners in Galatia and of mixed congregations in Rome.

What the Law Can and Cannot Do

Neither letter treats the law as evil. Both treat it as unable to justify.

Romans is almost pastoral toward the law. “The law is holy, and the commandment is holy, righteous and good” (Romans 7:12). Its work is to name sin and stop every mouth. “Therefore no one will be declared righteous in God’s sight by the works of the law; rather, through the law we become conscious of our sin” (Romans 3:20). Galatians says the same thing with a guardian image: “the law was our guardian until Christ came that we might be justified by faith” (Galatians 3:24). The law exposes sin. It does not give life.

Is the law, therefore, opposed to the promises of God? Absolutely not! For if a law had been given that could impart life, then righteousness would certainly have come by the law. (Galatians 3:21, NIV)

Romans 8:3 names the law’s weakness without insulting it: “For what the law was powerless to do because it was weakened by the flesh, God did by sending his own Son.” The problem is not the commandment. The problem is us. God condemns sin in Christ and gives the Spirit so that “the righteous requirement of the law might be fully met in us” (Romans 8:4). Faith does not cancel the law. “Do we, then, nullify the law by this faith? Not at all! Rather, we uphold the law” (Romans 3:31). Galatians upholds it by sending us to Christ and then to love, in which the law is fulfilled.

The Cross: Redeemed from the Curse

Both letters tie the verdict of justification to the death of Christ and interpret that death as substitution.
Christ redeemed us from the curse of the law by becoming a curse for us, for it is written: “Cursed is everyone who is hung on a pole.” (Galatians 3:13, NIV)

Romans says the same thing with the language of atonement. God “presented Christ as a sacrifice of atonement, through the shedding of his blood—to be received by faith” (Romans 3:25). Later Paul writes that God sent his Son “in the likeness of sinful flesh to be a sin offering” (Romans 8:3). In both letters the cross is where the curse falls and where Abraham’s blessing is opened to the nations. If righteousness could come by the law, “Christ died for nothing” (Galatians 2:21). The same death that frees us from condemnation also frees us from sin’s mastery. Romans 6 and Galatians 2 are therefore moral texts as well as doctrinal ones. The cross creates a people who no longer belong to themselves.

One People of God in Christ

Justification is never only about a private conscience. It is about who sits at the table.

So in Christ Jesus you are all children of God through faith, for all of you who were baptized into Christ have clothed yourselves with Christ. There is neither Jew nor Gentile, neither slave nor free, nor is there male and female, for you are all one in Christ Jesus. (Galatians 3:26–28, NIV)

Romans 3:22 and 10:12 sound the same note: there is no difference; the same Lord is Lord of all. Romans 3:29–30 presses the point from the oneness of God: “Is he not the God of Gentiles too? Yes, of Gentiles too, since there is only one God, who will justify the circumcised by faith and the uncircumcised through that same faith.” One God means one way of justification. One way of justification means one family.

In Galatia the threat was forcing Gentiles to become Jews. In Rome the threat was mutual contempt. If God has accepted a person by faith in Christ, the church may not impose an extra badge of belonging. Those who belong to Christ are Abraham’s seed and heirs according to the promise (Galatians 3:29).

Crucified with Christ, Alive to God

Both letters describe union with Christ in death and resurrection.

I have been crucified with Christ and I no longer live, but Christ lives in me. The life I now live in the body, I live by faith in the Son of God, who loved me and gave himself for me. (Galatians 2:20, NIV)

For we know that our old self was crucified with him so that the body ruled by sin might be done away with, that we should no longer be slaves to sin. … In the same way, count yourselves dead to sin but alive to God in Christ Jesus. (Romans 6:6, 11, NIV)

Dying to the law and dying to sin belong together. In Christ’s death the old self is judged and finished. What follows is a new center of life: “Christ lives in me.” Romans tells the church to count this as true. Galatians adds that the only boast left is “the cross of our Lord Jesus Christ” (Galatians 6:14).

The Spirit, Adoption, and Inheritance

The most intimate similarity may be the cry “Abba, Father.” Paul uses that word in both letters, and in both the Spirit teaches the heart to say it.

Because you are his sons, God sent the Spirit of his Son into our hearts, the Spirit who calls out, “Abba, Father.” So you are no longer a slave, but God’s child; and since you are his child, God has made you also an heir. (Galatians 4:6–7, NIV)

The Spirit you received does not make you slaves, so that you live in fear again; rather, the Spirit you received brought about your adoption to sonship. And by him we cry, “Abba, Father.” The Spirit himself testifies with our spirit that we are God’s children. Now if we are children, then we are heirs—heirs of God and co-heirs with Christ. (Romans 8:15–17, NIV)

The same chain appears in both letters: God sends the Son; the Son redeems; God sends the Spirit; the Spirit makes us children and heirs. Gentiles are not hired hands. They are adopted children. Galatians 3:2 asks, “Did you receive the Spirit by the works of the law, or by believing what you heard?” Romans 8 answers that those in Christ are under no condemnation and walk according to the Spirit. Justification and the Spirit are two sides of one salvation.

Freedom, Love, and the Fulfillment of the Law

Both letters fear returning to slavery and using freedom as cover for the flesh. The shared remedy is love.
You, my brothers and sisters, were called to be free. But do not use your freedom to indulge the flesh; rather, serve one another humbly in love. For the entire law is fulfilled in keeping this one command: “Love your neighbor as yourself.” (Galatians 5:13–14, NIV)

Let no debt remain outstanding, except the continuing debt to love one another, for whoever loves others has fulfilled the law. … Love does no harm to a neighbor. Therefore love is the fulfillment of the law. (Romans 13:8, 10, NIV)

Paul quotes Leviticus 19:18 in both places. The justified are released from self-salvation so that they can serve their neighbor. Galatians 5 names the conflict Romans 7 and 8 also describe: flesh against Spirit. “Walk by the Spirit, and you will not gratify the desires of the flesh” (Galatians 5:16). The Spirit grows love, joy, peace, and self-control. “Against such things there is no law” (Galatians 5:23).

What the Similarities Teach Us

Read together, Romans and Galatians keep the church from two perennial mistakes. The first is adding to Christ. Whenever belonging depends on a badge—ancestry, ritual, tribe, or spiritual performance—we are back in Galatia. The second is emptying faith of obedience. Whenever grace is treated as permission to ignore holiness and neighbor-love, we have not listened to Romans 6 or Galatians 5.

Abraham is not a foil for the gospel. He is its preview. The law is not the enemy of the promise. It is the guardian that leads to Christ. Paul is announcing that the God of Abraham has kept his word in Jesus and poured out the Spirit on all who believe.

The same gospel that silences the boastful mouth comforts the anxious one. God “justifies the ungodly,” sends the Spirit into the heart, and makes slaves into children and heirs. The setting changes. The gospel does not.

For Discussion and Prayer

1. Where do you hear the same sentence in both letters, and why does Paul need to say it more than once?
2. How does Abraham’s story in Genesis 15 help you trust God without first improving yourself?
3. In what ways are you tempted to treat the law as a ladder rather than a guardian that points to Christ?
4. What would change in your church if Galatians 3:28 and Romans 3:29–30 were taken as seriously as justification itself?
5. Where do you need to hear the Spirit’s cry of “Abba, Father” instead of the old voice of fear?
6. How will you use your freedom this week to serve someone in love?