Reformed or New Covenant: What Actually Divides Them

It does matter. And it's not as complicated as it sounds. Let me walk you through it, brother, because once you see the one question sitting underneath the whole argument, the fog clears fast.

First, Hear What They're Not Fighting About

This is the part that trips men up, so plant it deep before we go any further. Reformed theology and New Covenant Theology aren't fighting about how you get saved. Both of them hold the same gospel: saved by grace alone, through faith alone, in Christ alone. Most men in both camps are even Calvinists on salvation. So get rid of any idea that one of them is soft on the gospel. They're brothers, and they agree on the main thing.

What they disagree about is narrower, and it comes down to this: how do the covenants in the Bible fit together, and how does the Law of Moses reach you now that Christ has come? That's the whole ballgame. Keep it in front of you and the rest gets simple.

One quick word on the word Reformed, because people use it two ways. Sometimes it just means Calvinist, how a man is saved. Sometimes it means Covenant Theology, how the covenants and the law work. When we set it next to New Covenant Theology, we mean the second one. That's the actual other side of the coin.

What the Reformed Man Believes

The Reformed man reads the whole Bible as one long story with one covenant running down the middle of it. He calls it the covenant of grace. Adam, Abraham, Moses, David, the new covenant in Christ, in his reading those aren't separate deals. They're chapters of the same rescue, the same covenant of grace, just handled differently as history moves along.

Because it's all one covenant, his instinct is continuity. What God set up back in the Old Testament mostly carries forward, unless the New Testament clearly takes it off the table.

When he comes to the Law of Moses, he splits it into three parts. The moral law, which is the Ten Commandments. The civil law, which governed Israel as a nation. And the ceremonial law, the sacrifices and priesthood and feasts. He says the civil and the ceremonial were fulfilled in Christ and set aside, but the moral law, the Ten Commandments, still stands as your rule of life today. He calls that the third use of the law, the law as a guide for a saved man walking in gratitude, never as a ladder to earn heaven. A lot of Reformed men keep a Christian Sabbath on that same logic, and the Presbyterian side baptizes the infant children of believers, because they see a believer's children as part of the covenant the way circumcision marked the children under Abraham.

He'll point you to verses like this one:

"So then, the Law is holy, and the commandment is holy and righteous and good."
Romans 7:12, NASB 1995

And he'll lean hard on the words of Jesus:

"Do not think that I came to abolish the Law or the Prophets; I did not come to abolish but to fulfill."
Matthew 5:17, NASB 1995

He reads fulfill as uphold, keep it standing. So for him, the law is still your standard, now written on your heart and obeyed out of love.

What the New Covenant Man Believes

The New Covenant man reads the same Bible, but he sees a hinge in the middle of the story. There's the old covenant, given through Moses, and then there's the new covenant, given in Christ, and the move from one to the other is a real change, not just a fresh coat of paint. The old covenant was good, but it was always temporary. It did its job, it pointed to Jesus, and it came to its end in Him.

So his instinct isn't continuity. It's fulfillment. The old covenant as a whole is finished, and what carries into your life now is what Christ and His apostles pick back up and command.

When he comes to the Law of Moses, he doesn't split it into three parts. He says that grid is man-made, that the Bible never hands it to us, and that the Law came as one whole covenant and ended as one whole covenant at the cross. You're not under the Law of Moses now. You're under the law of Christ. A lot of the moral content is the very same, nine of the Ten Commandments get picked back up and reissued in the New Testament, but they bind you because Christ says so, not because Moses did. The one command that doesn't carry over as law is the Sabbath, because Christ Himself is the rest it was always pointing at. And he baptizes believers only, never infants, because he sees the new covenant as made up of people who've actually trusted Christ, not physical offspring.

He'll take you to verses like these:

"When He said, 'A new covenant,' He has made the first obsolete. But whatever is becoming obsolete and growing old is ready to disappear."
Hebrews 8:13, NASB 1995

"Therefore the Law has become our tutor to lead us to Christ, so that we may be justified by faith. But now that faith has come, we are no longer under a tutor."
Galatians 3:24 to 25, NASB 1995

"For Christ is the end of the law for righteousness to everyone who believes."
Romans 10:4, NASB 1995

And on the Sabbath specifically, he'll show you this:

"Therefore no one is to act as your judge in regard to food or drink or in respect to a festival or a new moon or a Sabbath day."
Colossians 2:16, NASB 1995

Paul goes right on to call all of that a shadow of what was coming, because the real substance belongs to Christ. And he reads fulfill back in Matthew 5:17 differently than the Reformed man does. He hears it as carry it all the way to its finish line, complete it. Same word, and that one word is doing a lot of the fighting.

The Difference, in One Breath

Here's the whole thing boiled down. The Reformed man reads the Bible as one covenant of grace and asks, what continues. The New Covenant man reads it as an old covenant giving way to a new one and asks, what did Christ fulfill and what does He restate.

From that one difference, the rest falls out. The Reformed man keeps the Law of Moses split three ways and holds onto the Ten Commandments as his standing rule. The New Covenant man keeps the Law whole, says it ended as a unit, and lives under the law of Christ. The Reformed man often keeps a Christian Sabbath. The New Covenant man says the Sabbath was fulfilled in Christ. The Reformed Presbyterian baptizes his infants. The New Covenant man baptizes believers only.

Why They Really Split

Strip all of it down and you find one question underneath, and almost everything else follows from how a man answers it. Is there one big covenant of grace running under the whole Bible, or not?

The Reformed man says yes. He agrees the Mosaic covenant is obsolete, Hebrews says so plainly, but he says there's a bigger covenant of grace underneath it that never ended. It just moved into a new and richer stage in Christ. So his gut says keep the continuity, and the Ten Commandments and the sign for the children carry straight across.

The New Covenant man says no. He doesn't see that one big covenant of grace stretched across everything. He sees the old covenant given through Moses, and then the new covenant in Christ that takes its place. Hebrews calls the first one obsolete, and he doesn't read a larger covenant surviving underneath it. So his gut says the old is finished, and you read the whole thing forward from Christ.

There's a second, smaller fork right next to it, and it's that word fulfill in Matthew 5:17. The Reformed man hears it as uphold, keep it standing. The New Covenant man hears it as complete, carry it to its finish. One word, read two ways, and a lot of the fight lives right there.

They're Still Brothers

Now hear me, because this next part matters as much as the rest. These two men aren't enemies. They both love Christ. They both hold the gospel of grace with both hands. They both take the whole Bible as the true Word of God, and they both want to obey Him with their lives. Neither one is trying to earn heaven by keeping rules, and both of them call a man to real holiness.

So don't take this and go swing it at a brother like a club. If a good man lands on the other side of this from you, he's still your brother, and this isn't the hill you die on. Know what you believe, know why, and be able to open your Bible and show it. But keep it in its proper place. The deity of Christ is a hill. This is a family conversation.

Where I Land, and Why

You probably already guessed where I come down. I'm New Covenant. When I put the whole Bible together, I can't get around Hebrews calling the first covenant obsolete, or Paul saying the Law was a tutor that brought us to Christ and that now we're no longer under it. I don't think the old covenant got upgraded. I think it got fulfilled and finished, and I think we live under Christ now, under His law, with the Spirit writing it on our hearts.

The Sabbath is the honest tell for me. I guard my Sunday hard. Every week it's for worship, for rest, and for my family, and I wouldn't trade it. But I don't keep it because an old command is hanging over my head. I keep it because it's good, and because Christ is my rest. That's the New Covenant read, straight down the middle, and it's where I've landed after a lot of years in the Book.

So there it is, both sides, laid out as fair as I know how. Go read Jeremiah 31, Hebrews 8, Galatians 3, and Colossians 2 for yourself. Read them slow. Then decide what you believe, and be able to say why. A man ought to know the ground he's standing on.