The Purpose of the Law
If rule-keeping doesn't make us good people, why do rules exist in the first place?
Galatians 3:15-29
Read the whole passage before anything else. Everything below exists to help you understand what you just read.
15Brothers, speaking of human terms, though it is only a man’s covenant, yet when it has been confirmed, no one makes it void or adds to it.
16Now the promises were spoken to Abraham and to his offspring. He doesn’t say, “To descendants”, as of many, but as of one, “To your offspring”, which is Christ.
17Now I say this: A covenant confirmed beforehand by God in Christ, the law, which came four hundred thirty years after, does not annul, so as to make the promise of no effect.
18For if the inheritance is of the law, it is no more of promise; but God has granted it to Abraham by promise.
19Then why is there the law? It was added because of transgressions, until the offspring should come to whom the promise has been made. It was ordained through angels by the hand of a mediator.
20Now a mediator is not between one, but God is one.
21Is the law then against the promises of God? Certainly not! For if there had been a law given which could make alive, most certainly righteousness would have been of the law.
22But the Scripture imprisoned all things under sin, that the promise by faith in Jesus Christ might be given to those who believe.
23But before faith came, we were kept in custody under the law, confined for the faith which should afterwards be revealed.
24So that the law has become our tutor to bring us to Christ, that we might be justified by faith.
25But now that faith has come, we are no longer under a tutor.
26For you are all children of God, through faith in Christ Jesus.
27For as many of you as were baptized into Christ have put on Christ.
28There is neither Jew nor Greek, there is neither slave nor free man, there is neither male nor female; for you are all one in Christ Jesus.
29If you are Christ’s, then you are Abraham’s offspring and heirs according to promise.
What just happened?
Imagine two people making a deal, signing a contract. Once that ink is dry, once it’s confirmed, you can't just stroll in later and demand new clauses or decide parts of it don't count. Paul uses this everyday observation about human agreements to talk about something far more ancient and significant: God's promise to Abraham. This promise wasn't some casual idea; it was a rock-solid, confirmed covenant, made centuries before. And Paul's point is, if human contracts are binding, how much more so is a divine one? This isn't just theological hair-splitting; it's about the reliability of God himself.
This letter is being written to churches in Galatia, a Roman province in what we now call Turkey, likely around 48-55 AD. The Christians there, a mix of Jewish and non-Jewish converts, were facing a serious problem. Certain teachers, often called 'Judaizers,' had arrived, insisting that non-Jewish believers needed to adopt Jewish customs, like circumcision and dietary laws, to be 'real' Christians. They were essentially arguing that Abraham's blessing came not just through faith, but through following the Law of Moses. This was a direct threat to the core message Paul had preached: that salvation comes through faith in Christ alone, not through human effort or ritual.
Paul is pushing back hard against this idea. He's saying, look, God made a promise to Abraham. That promise was about his "offspring" – not many descendants, but one specific descendant: Christ. This promise predates the Law of Moses by 430 years. If the Law (which came later) was meant to cancel or change that earlier promise, it would make God seem unreliable, like someone who signs a contract and then unilaterally alters it. But God doesn't operate that way. The Law, therefore, must have a different purpose entirely. Paul is setting the stage for a crucial distinction between two ways of relating to God: one based on promise and faith, the other based on rules and performance.
The Unbreakable Promise
Paul begins by appealing to common sense: "speaking of human terms, though it is only a man’s covenant, yet when it has been confirmed, no one makes it void or adds to it." His argument is simple but powerful: If even human agreements are binding once made, how much more so is God's covenant with Abraham? That promise, made to Abraham and his "offspring" (singular, which Paul identifies as Christ), was established centuries before the Law was given at Mount Sinai.
The timeline is crucial here. God's promise to Abraham wasn't a suggestion; it was a settled agreement. The Law arrived 430 years later. Paul asks us to consider: could something given later annul or override an earlier, confirmed promise? His answer is a resounding 'no'. If the inheritance from God were dependent on following the Law, it would nullify the original promise, making it irrelevant. But God's character dictates that his promises are dependable. He gave the inheritance to Abraham by promise, not by a future set of rules.
Why the Law, Then?
So, if the Law doesn't change the promise, "Then why is there the law?" This is the central question Paul tackles. His answer: "It was added because of transgressions." This phrase is often debated. Some scholars, like Krister Stendahl, suggest it means the Law was added to *multiply* transgressions, making sin more apparent. Others, like N.T. Wright, see it as the Law being added to *restrain* transgressions, acting as a guardrail. In either case, the Law's purpose wasn't to grant life or righteousness; it was designed to highlight humanity's inability to live up to God's standards.
Paul emphasizes the temporary nature of the Law's full authority: it was in place "until the offspring should come to whom the promise has been made" – meaning, until Christ arrived. The Law acted like a divinely appointed mirror, reflecting humanity's sinfulness and revealing the extent of our brokenness. It showed everyone that they were "imprisoned all things under sin," creating a universal need for a different kind of rescue – one that would come "by faith in Jesus Christ."
From Tutor to Family
Paul uses a vivid image: "before faith came, we were kept in custody under the law, confined for the faith which should afterwards be revealed." Think of a child with a strict but necessary guardian, a 'pedagogue' or 'tutor' (the Greek word is 'paidagogos'). In ancient Greco-Roman society, this wasn't a teacher, but a slave who supervised a child, escorting them to school, ensuring discipline and safety. The tutor's role was crucial but temporary, ending when the child matured.
The Law, then, was like this tutor. It didn't make us good, but it kept us in check, showing us our need, and guiding us "to Christ, that we might be justified by faith." Once Christ (and faith in him) arrived, the tutor's job was done. We are no longer children under strict supervision, but full "children of God, through faith in Christ Jesus." This new status breaks down all social, ethnic, and gender barriers: "There is neither Jew nor Greek, there is neither slave nor free man, there is neither male nor female; for you are all one in Christ Jesus." This unity means if you belong to Christ, you are automatically Abraham's true heir, sharing in God's original promise.
What are we supposed to see?
God's actions in this passage reveal his absolute faithfulness and unwavering commitment to his promises. He doesn't change his mind or renege on a deal once it's made. The promise to Abraham, made centuries before, is upheld and confirmed by Christ. This shows a God who is utterly reliable, whose word is his bond, and who orchestrates history to fulfill his initial, gracious intentions, even when a subsequent development (the Law) might seem to complicate things. His plan unfolds with precision, demonstrating a masterful long-term vision.
This passage also highlights God's strategic and purposeful nature. He didn't just throw the Law at humanity without a reason. He "added" it with a specific, temporary purpose: to demonstrate human brokenness and to lead people to Christ. This wasn't an arbitrary rule-set but a tool designed to prepare the way for a deeper, more profound relationship based on faith. It reveals a God who is both just (in exposing sin) and merciful (in providing the solution through Christ), meticulously guiding humanity towards salvation.
- 1WHAT HE VALUES
God values faithfulness to his word above all else, ensuring his promises remain unbroken despite human shortcomings or subsequent interventions.
- 2WHAT HE VALUES
He values a relationship based on trust and faith over one based on rule-keeping and performance, preferring genuine connection to rigid adherence.
- 3WHAT HE CONFRONTS
He confronts any system or teaching that seeks to add human effort or ritual to his free gift of grace, exposing it as an obstacle to true freedom.
Where this sits in the whole Bible
Galatians 3:16 → Genesis 12:7
Paul references God's original promise to Abraham, specifically the singular 'offspring' (seed) which he interprets as Christ, showing how God's plan was always centered on one ultimate heir.
Galatians 3:24 → Romans 7:7-13
Both passages explain that the Law's role is not to save but to reveal sin, acting as a guide or instructor that exposes our need for a different kind of righteousness.
Galatians 3:28 → Colossians 3:11
These verses powerfully affirm the radical equality and unity that believers share in Christ, transcending all societal distinctions like ethnicity, social status, or gender.
The Law wasn't God's Plan A for salvation, but a temporary, divinely-appointed detour designed to expose our utter need for Plan A: the promise of faith in Christ.
Don't rush past this
The hardest thing in this passage is Paul's blunt assertion that the Law, despite its divine origin, could not "make alive" (v. 21). For many, especially those who find comfort in clear rules and predictable systems, the idea that God's own perfect Law isn't the path to life feels deeply unsettling. It forces us to confront the limits of human effort and good intentions, suggesting that even our best attempts at righteousness are fundamentally insufficient in God's eyes.
This means embracing a truth that feels counter-intuitive to much of human nature: that God's solution for our brokenness isn't more rules, stricter discipline, or greater effort from our side, but a complete surrender to his unmerited grace. The Law's primary function was to show us how utterly trapped we are by sin (v. 22), stripping away any illusion of self-sufficiency and leaving us with nowhere to turn but to Christ. This exposure of our helplessness can be a profoundly uncomfortable experience.
Turn it inward
Three questions from this passage. Answer them or just sit with them — nothing here is required to finish the lesson.
Gracious God, thank you that your promises are solid and true, anchoring our hope. Forgive us for often trying to earn what you freely give. Help us understand the true purpose of your Law: not to make us worthy, but to show us our desperate need for Jesus. May we live as beloved children, secure in your promise, rather than striving in our own strength. Amen.
This week, identify one area of your life where you're subtly trying to earn God's approval or feel 'good enough' through your own effort or adherence to rules. Recognize that feeling, and instead, intentionally rest in the completed work of Christ and God's unwavering promise to you through faith. Shift your focus from performing for God to simply receiving from him.
History, language, objections and sources. None of it is needed to understand the passage.
If the Law was added because of transgressions, does that mean God created the Law knowing people would fail, just to make them look worse?
This question probes God's intentions. Paul doesn't suggest God set people up for failure. Rather, the Law illuminated existing human sin. It's like turning on a light in a dark room: the mess was always there, but the light reveals its full extent. The Law provided a clear standard that exposed sin (Romans 7:7-13), making it undeniable and demonstrating humanity's desperate need for a savior. The purpose wasn't to 'make them look worse' but to precisely define righteousness and reveal the universal failure to meet it, thus pointing to the need for God's grace.
Paul says the Law was for a temporary period "until the offspring should come." Does this mean the Law has no purpose at all for Christians today?
This is a complex and highly debated question. Paul argues that Christians are "no longer under a tutor" (v. 25) in terms of salvation through law-keeping. However, many scholars, like John Stott, would argue that while the ceremonial and civil aspects of the Old Testament Law were fulfilled in Christ or applied specifically to ancient Israel, the moral principles underlying the Law (e.g., the Ten Commandments) still reflect God's unchanging character and serve as a guide for ethical living. The Law's enduring purpose for believers isn't to justify us, but to show us what God values and how to live a life pleasing to him, informed by grace, not legalism. This is a point of ongoing discussion among theologians.
Paul says 'there is neither male nor female' (v. 28). Does this completely erase all distinctions and roles for men and women in the church or society?
This verse is about spiritual standing and equal access to God's promises, not necessarily the obliteration of all gender distinctions or roles. In Christ, men and women are equally children of God and heirs of Abraham, sharing the same spiritual status and dignity. This was a revolutionary statement in the ancient world. Whether this spiritual equality translates directly to identical roles in every aspect of church and societal life is a matter of ongoing theological discussion and interpretation. Some argue it implies full interchangeability of roles, while others believe it speaks to equal worth and salvation, but allows for complementary roles.
The 'Paidagogos' (Tutor)
The Greek word 'paidagogos' (παιδαγωγός), translated as 'tutor' or 'guardian' in verse 24, gives us a deeper insight into Paul's analogy. In Roman and Greek households, the paidagogos was not a teacher in the academic sense, but a trusted slave, often elderly, whose job was to supervise the master's son from about age six until puberty. They would walk the boy to school, carry his books, supervise his behavior, and generally keep him safe and disciplined. They instilled moral principles and ensured the boy adhered to household rules, sometimes with strictness or even physical punishment.
Crucially, the paidagogos had no authority over the inheritance or the child's ultimate status. Their role was temporary and preparatory, ending when the son matured and became legally an adult, taking his place as an heir. Paul's use of this term vividly illustrates the Law's role: it was essential for a time, keeping 'children' (humanity before Christ) in custody, exposing their need for guidance and discipline, but never intended to be the ultimate source of their inheritance or identity as God's children. Once Christ arrived, the 'son' reached maturity, and the paidagogos's job was complete.