2 Thessalonians 2:13-17 Sermon for September 27, 2026

I don’t typically deviate from the pattern of our planned preaching schedule, but this morning I am. I want to talk about what it means to be a confessional church and why it is incredibly crucial to be one. Now, listen: we’re going to have to work our way through some of the ‘dry’ definitions, but it’s really important you pay close attention.

In reality, there are only two types of churches: confessional affirmative ones and cultural accommodating ones. Here’s the differences between them:

In confessional affirmative churches, they hold tight to historical creeds, confessions, and deep theological convictions. They treat historic confessions as essential guardrails to preserve orthodoxy and protect the church from the whims of cultural shifts.

In cultural accommodating churches, they drift away from creeds, confessions, and foundational doctrines. Instead of standing firm on historic truths, they compromise and adapt their faith to match the preferences, pressures, and social standards of the contemporary culture, which will lead to nominalism, which is a practical description “Christian in name only.” In other words, cultural Christianity.

Alright, we’re going to unpack this in many ways, and in ways that’ll make more sense, but let’s springboard from Scripture. Turn with me to 2 Thessalonians 2:13-17.

“But we ought to thank God always for you, brothers and sisters loved by the Lord, because from the beginning God has chosen you for salvation through sanctification by the Spirit and through belief in the truth. He called you to this through our gospel, so that you might obtain the glory of our Lord Jesus Christ. So then, brothers and sisters, stand firm and hold to the traditions you were taught, whether by what we said or what we wrote. May our Lord Jesus Christ himself and God our Father, who has loved us and given us eternal encouragement and good hope by grace, encourage your hearts and strengthen you in every good work and word.”

Someone had shaken the Thessalonians. A rumor had gone through the congregation that the Day of the Lord had already come. Some claimed a “spirit.” Some claimed a spoken word. Some even claimed a letter “as if from us.” In other words, the COUNTERFEIT wore apostolic clothing. And the church, which had already suffered persecution, was now suffering confusion. Confused saints do not stand. They sway. There is a TON of that going on today. A Ton!

So Paul does not give them a pep talk. He gives them theology (doctrine), then a command, then a blessing. That is the shape of a healthy church: gospel first, confession next, comfort last.

Look first at verse 13. Before Paul tells them what to do, he tells them what God has done. “We ought always to give thanks.” Not “we feel thankful when the attendance is up.” Ought. Thanksgiving is a duty because salvation is a gift.

He calls them “brothers beloved by the Lord.” That is not sentiment. Then he grounds the thanks: “God chose you… to be saved.” Salvation does not begin in your decision. It begins in God’s choice. And that choice does not float in the air. It comes “through sanctification by the Spirit and belief in the truth.”

Do you see the two hands of God? The Spirit sets you apart. The truth is believed. Not the Spirit without truth—that is mysticism. Not truth without the Spirit—that is a seminary exam. God saves a people by making them holy and making them believers of a definite gospel.

Verse 14: “To this he called you through our gospel.” The call is not a whisper in the woods. It is the preached gospel. God uses means. He uses words. He uses apostles. He uses letters. And the aim is not a slightly improved life. The aim is “the glory of our Lord Jesus Christ.” You were not chosen to be vaguely spiritual. You were chosen to share in Christ’s glory.

Then verse 15 lands like a hammer: “So then.” Therefore. Because God chose you, because the Spirit sanctifies you, because the gospel called you, because glory is ahead of you—stand firm and hold to the traditions.

The word traditions frightens a lot of church people and it shouldn’t. They hear incense and a man in a hat. Relax. Paul is not handing the church to Rome. The word is paradosis: that which is handed down. In Matthew 15 and Colossians 2, human tradition is condemned because it replaces the Word of God. Here the same word is commanded because this tradition is the Word of God, delivered by Christ’s apostles “by our spoken word or by our letter.”

So the issue is not whether you will have tradition. The issue is whose tradition you will hold when a smiling teacher arrives with a new reading of an old verse. A ton of that going on today as well.

Verses 16–17 then show you that standing firm is not grit in the teeth. “May our Lord Jesus Christ himself, and God our Father”—notice the two persons named together as the source of one blessing—“who loved us and gave us eternal comfort and good hope through grace, comfort your hearts and establish them in every good work and word.” Doctrine that does not produce comfort, hope, good work, and good speech is not the doctrine Paul is talking about. A confession is not a freezer. It is a foundation.

What a confession is

A confession of faith is the church’s public, written summary of what she understands the Bible to teach on the main doctrines of the faith and the life of the church. It is not a second Bible. Scripture alone is the final authority. The confession is a subordinate standard: this congregation’s agreed reading of Scripture, so that we do not pretend to “believe the Bible” while meaning twenty different Bibles.

It is corporate. It says we, not merely I, the current preacher. It is tested. Dead men helped write it, which is a mercy, because dead men are harder to flatter.

This church holds the Second London Baptist Confession of 1689. We do that not because 1689 is inspired, but because it is a faithful map of the inspired Book. Maps are not the country. But only a fool throws away the map and then boasts that he “just follows the land.”

What a confession does

A confession defines the faith we actually preach. God, Scripture, Trinity, creation, fall, Christ the Mediator, effectual calling, justification, the church, baptism of believers, the Lord’s Supper, the Lord’s Day, the last things—these are not hobbyhorses. They are the house.

A confession unites. Ephesians 4 says there is one faith. Unity is not “we all love Jesus in our own way.” That is a group project with no assignment. Unity is shared truth.

A confession teaches. Spurgeon knew this. When he reprinted the 1689 for his own congregation, he said it was “a most excellent epitome of the things most surely believed among us.” Then he told them, “This little volume is not issued as an authoritative rule, or code of faith, whereby you are to be fettered, but as an assistance to you in controversy, a confirmation in faith, and a means of edification in righteousness. Here the younger members of our church will have a body of divinity in small compass, and by means of the Scriptural proofs, will be ready to give a reason for the hope that is in them.” That is catechesis with a backbone. We do not want young saints who can only say, “Well, my pastor said…”

Or Josh Howerton Said. Or Philip Mitchel Anthony Said. Or fill in the blank. Ironically, when people often say they don’t want confessions already claim a confession when they say, “This internet pastor says…” You’ve claimed a confession that’s built on really shaky grounds.

A confession binds the pulpit. Elders are not freelance oracles. They are stewards. You have a right to know what you will hear. You have a duty to test what you hear.

A confession protects the sheep from the shepherds. That sounds unkind until you have met a gifted man with an unchecked system. Carl Trueman has argued for years that a public confession limits the power of the church over the conscience. If the standard lives only in the pastor’s head, the church is at the mercy of the pastor. If the standard is written, the people can say, “Brother, that is not what we confessed.” That is not rebellion. That is membership with a spine.

A confession hands the faith to the next generation. J. V. Fesko has put it as strongly as anyone: confessions are not a nicety. They are necessary for the being and the well-being of the church, because the Bible itself commands the people of God to confess the faith and teach it to their children. Israel had the Shema. The apostles had “faithful sayings” and a “pattern of sound words.” Jude said contend for the faith once for all delivered. Fesko’s point is simple: God never told His people, “Just keep the scroll nearby and hope the kids figure it out.”

Voddie Baucham loved this confession enough to make a ten-week study of it a prerequisite before membership class in the church he planted. That is not fussiness. That is honesty. Why would you join a family without asking what the family believes? Why would a church receive members who have never been told what “we” means?

What a confession prevents

It prevents drift. Error rarely knocks. It slithers. It says, “We’re just asking questions.” A confession forces the question to stand in the light.

It prevents hidden disagreement. Two people can sing the same song and mean opposite gospels. Better to find that out in membership than in a church split over the funeral of a saint.

It prevents personality religion. If the church’s faith is the pastor’s current emphasis, then when the pastor leaves, the faith leaves. That is a cult with better parking.

It prevents the rule of the newest voice. Beloved, the Holy Spirit has been teaching the church for two thousand years. It is possible—just possible—that your original take on justification is not a breakthrough.

It prevents cooperation without content. You cannot plant churches, train preachers, or send missionaries on vibes. Paul did not say, “Hold the energy we shared in the small group.” He said hold the traditions you were taught.

The great alternative is, “No creed but the Bible.”

It sounds humble. It is a creed. Those five words are not in the Bible. Trueman is right: there are only two kinds of Christians—those who admit they have a creed, and those who have one and deny it. The second group is not more biblical. They are less accountable.

“No creed but the Bible” does not protect Scripture. It abandons interpretation to private judgment. Arians quoted the Bible. Socinians quoted the Bible. Liberals quoted the Bible until the binding fell off. The question is never, “Do you believe the Bible?” The question is, “What do you say the Bible means, and will you say it in public?”

Churches that “have no confession” still have one

Every church has a confession. The only question is whether it is written, public, tested, and corrigible—or unspoken, shifting, and owned by whoever holds the microphone.

The unwritten confession is usually a thin website paragraph, the pastor’s unpublished system, the tastes of influential families, and whatever the culture has recently decided is non-negotiable. It is weak because it is invisible. You cannot join it. You cannot test it. You discover the real rules when you collide with them. It is thin where the Bible is thick. It is unstable when staff changes. It is still exclusive—just dishonestly. Try introducing a denial of the bodily resurrection into a “no-creed” church that has always preached otherwise. You will meet a creed. They simply never owned it.

Two stories, and neither is funny for long

In eighteenth-century England, many General Baptist churches grew tired of tight confessional boundaries. They wanted a broader, kinder faith. They kept the Bible on the table and loosened the documents that said what the Bible taught about the Godhead and the gospel. Within a generation, large portions of that movement slid into Unitarianism. They did not convene a council and vote to stop worshiping Christ. They just stopped having a confession strong enough to say no. Ichabod does not always arrive with a parade. Sometimes it arrives with a motion to “major on the majors.”

Then look at the Northern Baptists in 1922. Conservatives tried to bind the convention to a confession. The floor chose “no creed but the New Testament.” A charming speech won the day: we learned the Bible at mother’s knee, not a confession. It sounded like piety. It was a suicide note. Seminaries that had already gone soft kept going. Harry Emerson Fosdick asked whether the fundamentalists would win. The convention answered by refusing a confession. A century later that family of churches is a cautionary tale with buildings. “We believe the Bible” was not enough, because everyone in the fight claimed the Bible.

Do not flatter yourselves that we are too spiritual for that. The same flesh lives here. The same slogans still preach. The same devil still prefers a church with an open Bible and a closed mouth.

Paul’s command has two verbs. Stand firm—do not be knocked off your feet by a forged letter or a fashionable teacher. Hold—grip the apostolic gospel the way a drowning man grips the rope.

What do we hold? The truth through which the Spirit sanctifies. The gospel through which God called us. The faith once delivered. In this congregation that public grip has a name and a date: the 1689 Confession, always under Scripture, never over it, never instead of it.

Spurgeon again: “Be not ashamed of your faith; remember it is the ancient gospel of martyrs, confessors, Reformers, and saints. Above all, it is the truth of God, against which the gates of hell cannot prevail. Let your lives adorn your faith, let your example recommend your creed… Cleave fast to the Word of God which is here mapped out for you.”

That is the whole sermon in one charge. Believe the Book. Confess the Book together. Live the Book. Hand the Book to your children with more than a shrug and a playlist.

And then do what Paul does. Pray. Because you cannot stand by paper alone. “May our Lord Jesus Christ himself, and God our Father, who loved us and gave us eternal comfort and good hope through grace, comfort your hearts and establish them in every good work and word.”

Chosen saints, Spirit-sanctified saints, truth-believing saints: stand firm. Hold fast. The Day has not been missed. The Man of lawlessness will not win. Christ will. And until He comes, this church will not be a weather vane. We will be a confession with a pulpit, a Table, a baptistry, and a people who know what they believe—and why they will not let it go.