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Introduction

Think about the last time you signed up for something. Maybe it was a gym membership, a streaming service, or a warehouse club like Costco. What did you have to do? You filled out a form, gave them your email, handed over a credit card, and they put your name on a roster. Just like that, you were a member. You got a little plastic card to prove it. But let me ask you a question: Does having a gym membership card automatically make you fit? Does it change your muscle mass or your lung capacity? No. You can have your name on a gym roster for ten years and never step foot inside the building. The roster just means your name is written on a piece of paper. It doesn't change who you are.

I have found that a lot of people think church membership works exactly the same way. They think that if their name is on a church database, or if they walked down an aisle years ago, they are automatically part of God’s family. They treat the church like a club with a roster. But when we look at the Bible, we discover that God views His church completely differently. Church membership isn't best seen as a roster; it’s best seen as a DNA test. A DNA test doesn't care about what club you signed up for. It looks at your internal code. It reveals who your true father is. It proves what kind of blood flows through your veins. It shows your true identity from the inside out. In the same way, being part of God's true church isn't about getting your name on a human list. It is about a radical, internal change that proves you belong to God’s family (John 1:12-13).

Today, we are looking at a promise God made hundreds of years before Jesus was even born. It is a promise found in Jeremiah 31:31–34, where God lays out the ultimate blueprint for a brand-new community. From this passage, we are going to look at three massive truths that show us how the church is God's new community people:

There’s a Distinct Foundation: It’s Better Than the Old

Observation

When you look closely at verses 31 and 32, the first thing you notice is a sharp contrast. God says pretty clearly, "Look, the days are coming... when I will make a new covenant." Then He immediately clarifies what this new agreement will look like by telling us what it will not look like. He says, "This one will not be like the covenant I made with their ancestors." What was the covenant made with the ancestors? We have to travel back in time to the book of Exodus. After God rescued the nation of Israel from slavery in Egypt, He brought them to the base of a giant, smoking mountain called Mount Sinai. There, amid thunder and lightning, God gave them the Old Covenant. The core of this covenant was the Ten Commandments, which God literally carved into tablets of stone.And God explicitly points out that the first covenant was broken by the people, even though He was a perfect master to them.

Historical Context

It was a legal agreement for a geopolitical nation. The rules were external—written on rocks outside of the people. Israel agreed to follow these rules, and God promised to bless them if they did. But there was a major flaw in this system, and the flaw wasn't God or His laws. The flaw was the people. They couldn't keep the rules. In fact, while Moses was up on the mountain getting the stone tablets, the people down below were already breaking the very first commandment by worshiping a golden calf. They broke the contract immediately. For centuries, Israel trapped themselves in a tragic cycle of rebellion, judgment, and failure. The old foundation could show them their sin, but it couldn't give them the power to stop sinning (Galatians 3). God is announcing that the old contract is being superseded because the people defaulted on it, and He is establishing a brand-new foundation.

Interpretation/Illustration

Think of the shift between the Old Covenant and the New Covenant like the shift from Blockbuster Video to Netflix. Back in the 1990s and early 2000s, if you wanted to watch a movie, you had to follow the Blockbuster system. It was a physical, brick-and-mortar building. You had to drive to a specific building. You had to search the physical shelves. You had to carry a plastic membership card. And the system was completely driven by strict rules and penalties. You had to return the tape by a specific time, and you had to follow the law of "Be Kind, Rewind." If you broke the rules, you faced heavy, frustrating late fees.

But then Netflix came along and completely changed the game. Netflix didn't just look at Blockbuster and say, "Let’s build a nicer store or waive the late fees." No, they blew up the old brick-and-mortar stores entirely. They moved the movies to the cloud and streamed them directly into your house. The old physical constraints disappeared.

This is what Jesus did. When He died on the cross and rose again, He instituted the New Covenant. He didn't just give the Old Covenant a cosmetic facelift (Hebrews 8:6). He didn't lower the penalties. He completely upgraded the infrastructure. The Old Covenant relied on human strength to keep external rules on stone tablets, and it failed. The New Covenant is built on the perfect, finished work of Jesus Christ. It is an entirely new foundation that doesn't rely on your track record, but on His.

Application

What does this mean for us today? It means we must stop treating our faith like an old-school legalistic rental shop. Many Christians are still living with a "Blockbuster mindset." They think their standing with God depends entirely on how well they follow a checklist of external rules today, and they live in constant fear of God's spiritual "late fees" and their membership being revoked (2 Cor 3:6).

But the church is built on a completely distinct, superior foundation. Your membership in God's new community doesn't depend on your flawless ability to keep a contract. It depends on Jesus, who kept the contract perfectly for you. When you join a local church, you aren't signing up to be managed by a rigid set of external codes; you are stepping onto a foundation of pure grace secured by the blood of Christ.

There’s an Internal Transformation: Hearts Are Made Alive

Observation

If the new foundation isn't built on stone tablets, where is it then built and stored? Look at verse 33. God says, "Instead, this is the covenant I will make... I will put my teaching within them and write it on their hearts." Do you hear the shift in location?? God goes from putting His law beside them on a mountain to putting His law inside them. He changes from writing on cold, dead stone to writing on living, breathing human hearts.

This is the biblical definition of regeneration—being spiritually born again. God promises that the members of this new community will experience a radical, internal transformation.

This is John 3, you must be born again. This is 1 John, where the Spirit becomes our Teacher! There isn’t just knowledge-change. There’s actual special, brand-new change made in you! You get a new heart!

Historical Context

When we think of the heart today, we think of romance and feelings. But to the ancient Israelites, the heart was the command center of the entire human being. It was the place where you made choices, processed thoughts, exercised your will, and formed your deepest desires.

This is why I rail hard on behavior and fruit! Not because Christianity is behavior modification. Slap a dog collar on someone, and they will change. And it wasn’t that people didn’t know better. The prophets knew that Israel’s fundamental problem wasn't a lack of information. They had the scriptures! The problem was that their command centers were broken.

Later in Israel's history, the prophet Ezekiel would describe the human condition as having a "heart of stone." A stone heart can't beat, it can't feel, it can't respond to God, and it certainly can't obey Him. You can yell at a stone, you can write beautiful laws on a stone, but at the end of the day, it is still just a dead rock. For God’s new community to actually work, God had to solve the heart problem. He had to perform open-heart surgery on His people.

Interpretation/ Illustration

A great picture of this internal transformation comes from Tony Stark, the brilliant billionaire. He had a fatal flaw. During a battle, a piece of shrapnel gets lodged in his chest, and it is slowly moving toward his heart. If it reaches his heart, he dies. To protect himself from outside threats, Tony builds a magnificent, high-tech suit of armor. It has lasers, it can fly, and it is incredibly strong on the outside. But that external armor cannot save him from the internal crisis happening in his chest. The armor can't stop the shrapnel. To survive, Tony has to invent a device called the Arc Reactor. He implants this glowing, high-tech power source directly inside his chest. The Arc Reactor creates amagnetic field that keeps the shrapnel away from his heart, and it simultaneously provides the internal power needed to run the entire suit from the inside out. Without that internal power source, the armor is just a heavy, suffocating metal coffin.

This is exactly what religious moralism does. Religion tells you to put on a nice, shiny suit of external Christian armor. It tells you to change your vocabulary, attend religious services, and look highly moral on the outside. But if your heart is still dead, if the shrapnel of sin is still destroying you from within, that armor is just a heavy burden. It’s a spiritual coffin. God doesn't just hand us an external suit of rules. He implants a spiritual Arc Reactor. He gives us a new heart through the Holy Spirit, which changes our desires and powers our lives from the inside out.

Application

Here’s the core idea: Church membership requires a regenerated heart. The local church is not meant to be a mixed crowd of people who just like religious behavior. It is designed to be a gathered community made up entirely of people whose hearts have been made alive by the Holy Spirit (Titus 3:5-6).

Look at your own life honestly. Are you just polishing the outside of your armor? Are you just trying to force yourself to behave like a Christian because you think you're supposed to? True Christianity is not about behavior modification; it is about spiritual resurrection and new life. If you want to truly belong to God's new community, you don't need to try harder to keep the rules. You need to cry out to God for a new heart. You need Him to write His love, His truth, and His desires directly into your internal command center.

There’s a Shared Experience: We Know God

Observation

Look at verse 34. This might be the most astounding part of Jeremiah’s prophecy. God says, "No longer will one teach his neighbor or a brother, saying, ‘Know the Lord,’ for they will all know me, from the least to the greatest of them." Question: How this ispossible? Answer: "For I will forgive their iniquity and never again remember their sin."

Everyone shares the exact same canon experience in the New Covenant! There are no subscription tiers of membership. There are no VIP Christians who have special access while everyone else watches from a distance. Every single person in this community has a direct, personal, and forgiven relationship with the living God. Pastors might know more, but they have the same amount of the Spirit sealed within them as anyone else. Your favorite preacher doesn’t have an in with God that you don’t have! We call him together: Savior, Sustainer and Friend!

Historical Context

Under the Old Covenant system, access to God was highly restricted hierarchical. The average Israelite citizen did not have direct access to the presence of God. If you wanted to interact with God, you had to go through a mediator. You had to find a prophet to hear God's word, or you had to bring an animal to a priest who would go into the Temple and offer a sacrifice on your behalf.

Furthermore, the Old Covenant community was a "mixed" community. Because membership was based on physical birth, you became an Israelite simply by being born into an Israelite family. As a result, thousands of people were citizens of the nation, but they had absolutely no personal faith or love for God. You saw this in the gospels, right?Pharisees erroneously thought they were connected to the covenant because they were genetically connected to Abraham! A child would grow up in Israel, and their parents or neighbors would literally have to look at them and say, "Hey, you need to know the Lord," because the child had no spiritual connection to Him. But Jeremiah says that in the New Covenant, the church will be different. It will not be defined by physical birth, but by spiritual rebirth.

Interpretation/Illustration

For years, millions of people watched movies and shows by piggybacking on someone else's account. You could use your parents' password, your old roommate's login, oryour friend's premium subscription. You got to enjoy all the benefits of the service without actually having your own personal account or paying a dime. You were connected to the platform by association.

But eventually, the company cracked down. They rolled out a screen that said, "This device isn't part of your Netflix Household." The party was over. It didn't matter if your dad had been a loyal subscriber for fifteen years; if you didn't have your own individual login, you were locked out. You couldn't ride on someone else's coattails anymore.

The New Covenant community has a strict "no password sharing" policy. In ancient Israel, you could piggyback on the national covenant just because your parents were Jewish. The old bumper sticker is true: In the Church, God has no grandchildren. He only has children.

Without holiness, no one will see the Lord. Pride is an offense to the Lord. You cannot log into the Kingdom of God using your grandmother’s faith, your parents' church attendance, or your spouse's prayers. Have you always been a Christian? If you would say “yes,” the Bible says that you haven’t ever been one…

Jeremiah tells us that every single member of this new community must have their own personal, direct "login" with God. From the least to the greatest—whether you are a brand-new believer who just walked through the doors, or a theologian who has studied the Bible for fifty years—we all share the exact same access to the Father because our sins have been completely forgiven by Jesus. Let us go boldy now to the throne of Grace!

Application

This completely changes how we view ourselves and one another in the church. It means that there is absolute equality at the foot of the cross. No one is more important than anyone else, because we all entered the community through the exact same doorway: personal repentance and faith.

But it also an urgent warning: Do not assume you are right with God just because you hang around Christian environments. Do not assume that because you grew up in a Christian home, or because you sit in a church pew every Sunday, you are automatically "signed in" to the Kingdom. You must have your own personal relationship with Jesus Christ. You must experience the forgiveness of your own sins (John 17–Eternal Life is knowing God).

And you can!

Conclusion: Do You Belong?

As we wrap up today, let’s bring it all back to our main idea: The Church is God’s New Community People.

This community isn’t a country club built on human rules, it’s not a uniform or suit of moral armor, and it’s certainly not a place where you can coast by on someone else’s faith. It is a vibrant, living body built on a distinct foundation of grace, powered by Internal heart transformation, and united by a shared personal knowledge of God.

So, let's look at the DNA test. Let's ask the ultimate question: Do you truly belong to this community (2 Cor 13:36):

  1. Look at the foundation of your life: Are you still trying to earn your way to heaven through a checklist of rules, or are you resting completely on the finished work of Jesus? Would you say that you’ve been a Christian you’re whole life?

  2. Look at your heart: Has God done an internal work in you? Do you actually want to love and obey Him, or are you just pretending on the outside while your heart remains cold as stone?

  3. Look at your relationship with Him: Do you know God personally? If you were stripped of your family's heritage and your church attendance records, would you still have a personal "login" with Jesus Christ? If you look at your life today and realize that you’ve just been a name on a roster, the good news is that the door to the New Covenant is wide open right now. Jesus paid the ultimate price on the cross to purchase your forgiveness and to give you a brand-new heart. He wants to take away your stone heart today and replace it with a living one.

Don't settle for a plastic membership card. Turn away from your sin, put your trust in Jesus, and become a true part of God's new community.

For more blog posts from Pastor Tim, check out The Bitz Blitz