If the law can’t save us, and we don’t have to keep it to stay in God’s good books, then what’s the point of it? Is the law actually a bad thing? That’s the bold question Paul tackles head-on in Romans 7:7–13 — and his answer is an emphatic certainly not. The law, he insists, is holy, righteous, and good. The problem was never the law. The problem is us.
Paul uses a memorable analogy: your car is a wonderful machine, perfectly designed for paved roads. But if you try to drive it across boulder-strewn fields in Connemara, you’ll destroy it. That doesn’t make the car bad — it means you’re using it for something it wasn’t designed to do. The same is true of the law. It was never meant to make us righteous before God. If you try to use it as a stepladder to reach him, you’ll only crush yourself under the weight of impossible demands.
So what is the law designed to do? Paul identifies four functions it serves in the life of someone who hasn’t yet come to faith.
First, the law exposes sin. Everyone has some dim awareness that they’re not perfect. But the law is like stepping from a dark lane into the bright kitchen light and discovering you’re covered in mud from head to toe. It’s like putting your phone under a microscope — what looked clean is crawling with things you couldn’t see. Paul uses the tenth commandment, “Do not covet,” as his case study: it’s the only commandment that deals purely with internal desires. Before the law shone its light, Paul thought he was blameless. Afterwards, he could see that sin went far deeper than outward actions — into his thoughts, motives, and desires.
Second, the law provokes sin. This is perhaps the most surprising function. Tell someone not to open the big red book on the shelf, and suddenly it’s the only book they want to read. An archbishop reads a sign saying “Do not spit in the train carriage” and immediately feels saliva welling up. Augustine stole pears he didn’t even like, simply because they were forbidden. The law’s intense goodness draws out the rebellion lurking in our hearts. Paul describes sin as “seizing the opportunity” afforded by the commandment — hijacking God’s good law like an enemy tank and turning its firepower against us.
Third, the law convicts of sin. It doesn’t just show us our sin; it makes us feel the weight of it. Paul experienced this during those three days of blindness after the Damascus road. Sitting in darkness, unable to eat or drink, he meditated on God’s commandments and for the first time truly saw how guilty he was. The law is meant to bring us to the point where we abhor ourselves — not to be cruel, but to prepare us for the cure.
Fourth, the law reveals the extreme sinfulness of sin. The fact that sin can take something as pure and good as God’s law and twist it into a weapon of temptation shows just how wicked sin really is. It’s like the scam artist who exploits an elderly person’s trust — using their goodness against them. Sin corrupts everything it touches, and the law makes that corruption visible.
All of this sounds harsh. But it has a purpose. It’s only when we despair of our own goodness that we’re ready to hear about the One who kept the law perfectly on our behalf. Put the life of Jesus Christ under the microscope, turn the light up to full intensity, and you will not find one spasm of selfishness, one wrong thought, one misplaced word. And yet on the cross, he was punished as though he had broken every one of those 613 commandments, every day of his life. He took our record and gave us his. That is the gospel — and without the law’s painful diagnosis, we would never know how desperately we need it.
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