Interdenominational
Short answer: Interdenominational describes relations and cooperation between Christian denominations, and 1 Corinthians 1:10-17 supplies its foundation. Paul begs the Corinthians to speak the same thing, to have no divisions, and to be perfected together in the same mind and judgment. He does not command uniform rituals or one administrative structure. He commands unity around the crucified Christ and the gospel Paul preached. Denominational labels are not the sin Paul names; the sin is dividing over human leaders and treating party identity as the ground of belonging. So interdenominational faithfulness means recognizing believers who hold the same gospel, refusing to make secondary convictions into tests of salvation, and working together for the truth without pretending real disagreements do not exist.
The problem Paul was actually addressing in Corinth
Corinth was not a quiet town, and its church reflected the city. Members of the congregation were aligning themselves with favorite teachers. Paul names the parties directly: some said they followed Paul, some Apollos, some Cephas, and some Christ. The tragedy is that the gospel created a family, and the family immediately split into fan clubs. Each group probably thought it was defending the truth. Instead each was turning a servant of the gospel into a competing brand.
Paul's appeal is urgent and personal. He begs through the name of the Lord Jesus Christ, not through his own authority as founder. He asks for three things that belong together: the same speech, no divisions, and a perfected unity of mind and judgment. That last phrase rules out surface politeness that hides suspicion. Paul wants a genuine shared understanding, not managed silence.
We should notice what Paul does not do. He never says doctrine does not matter. The very letter that pleads for unity spends chapter after chapter correcting serious errors about the resurrection, the Lord's Supper, sexual sin, and lawsuits. Unity in the New Testament is always unity in the truth, never indifference to it. The Corinthians' divisions were sinful because they were fracturing over loyalty to men rather than uniting around the message of the cross.
What interdenominational does and does not mean
Interdenominational simply means across or between denominations. It describes gatherings, mission agencies, campus ministries, and conversations where Christians from Anglican, Baptist, Presbyterian, Methodist, Pentecostal, and other traditions meet as believers. It does not describe a single super-church that erases every tradition, and it does not require anyone to pretend that baptism, church government, the Lord's Supper, and ordination are trivial matters. Faithful Christians have differed on those points for centuries.
What interdenominational fellowship does require is a shared conviction about the person and work of Jesus Christ and the authority of Scripture. Where that shared conviction exists, believers can pray together, serve the poor together, defend the unborn together, and study the Bible together without surrendering their distinct convictions. Where it does not exist, no amount of goodwill creates unity, because there is no common foundation to build on.
This is why the distinction between primary and secondary matters is practical, not evasive. Primary matters are those on which salvation itself rests. Secondary matters are real and worth debating, but they do not determine whether someone belongs to Christ. Confusing the two categories is the source of most church splits. Refusing to make any distinctions at all is the source of most confusion.
Why Paul grounds unity in the name of Jesus rather than in agreement
Paul's appeal rests on a name, not on a negotiated platform. He writes in 1 Corinthians 1:10, "Now I beg you, brothers, through the name of our Lord, Jesus Christ, that you all speak the same thing." The name is the ground. The Corinthians did not create their unity; they received it when they were called into fellowship with God's Son. Their divisions were therefore a contradiction of what they already were, not merely a failure of manners.
This matters for interdenominational work today. If unity rests on agreement about every secondary issue, it will never happen, because sincere believers read Scripture differently on real questions. If unity rests on the name of Jesus and the gospel of his cross, then it exists whether or not every tradition sees eye to eye. We do not manufacture it; we recognise it and stop violating it.
Paul's question cuts deep: is Christ divided? The obvious answer is no. If Christ is one, then a church that splinters over human teachers is acting as though the body can be chopped into pieces without damage. The unity Paul commands is not aspirational sentiment. It is the practical outworking of union with one Lord.
How Jesus prayed for this unity before the church existed
In John 17 Jesus prays not only for his immediate disciples but for those who will believe through their word. That includes every later generation, every tradition, and every denomination that holds the apostolic message. His prayer is that they may all be one, and he ties that unity to the world's belief that the Father sent him. Unity is not a nice extra; it is a witness.
That prayer should humble every tradition. None of us is the whole church. Each denomination sees some things clearly and is blind to others. The prayer of Christ is not answered by one tradition absorbing all the rest, and it is not answered by pretending differences are meaningless. It is answered when the world can see a people who love one another and who share one gospel even when they worship in different buildings.
The application is uncomfortable but plain. If Jesus prayed for it, we cannot treat interdenominational hostility as normal. We can still disagree strongly. We cannot despise, slander, or write off brothers and sisters whose confession of Christ is genuine and whose lives show the fruit of the Spirit.
Walking worthily is the practical shape of visible unity
Ephesians 4 turns the doctrine of unity into a way of life. Paul, a prisoner in the Lord, begs believers to walk worthily of their calling with all humility, gentleness, patience, and forbearance in love. Then he commands them to keep the unity of the Spirit in the bond of peace. Notice the grammar: the unity already exists. Our job is to keep it, not to invent it. That means the work is mostly about how we treat people.
This is where interdenominational relationships live or die. It is easy to affirm unity in the abstract and then speak contemptuously about another tradition in conversation. Patience and forbearance are the practical tests. A believer who cannot listen to a different tradition without caricature is not keeping the unity of the Spirit, no matter how orthodox the creed.
Ephesians grounds the command in facts: one body, one Spirit, one hope, one Lord, one faith, one baptism, one God and Father of all. The list is not a checklist of our achievements. It is a description of what God has done. Because these things are true, division among those who confess them is not merely unwise; it is dishonest.
One body, many members, and the difference that makes
Paul's picture in 1 Corinthians 12 is the human body. It is one, and it has many members, and the members are not all the same. That is not a design flaw. Differences of function, background, and emphasis belong to the body's health. The eye cannot dismiss the hand, and the head cannot dismiss the feet. Every member is needed, and every member is accountable to the whole.
Applied to denominations, this means we should expect diversity without celebrating division. Different traditions often emphasise different biblical themes: some stress doctrine, some experience, some liturgy, some mission, some holiness. If a tradition is faithful to the gospel, its emphasis can enrich the rest of the body rather than threaten it. The body is not damaged by having many members; it is damaged when members refuse to belong to one another.
Paul also warns against the opposite error, the member that says it has no need of the rest. That is the posture of any group, denominational or otherwise, that believes it can be the whole church by itself. Interdenocminational humility is not weakness. It is honesty about what we are.
How Romans 14 teaches unity without uniformity
Romans 14 supplies the method. Paul tells the Roman believers to accept the one who is weak in faith, but not for disputes over opinions. The issues in view were real: food laws and holy days. Paul does not say the disagreements are imaginary. He says they are not grounds for despising or judging one another, because each believer answers to the Lord who received him.
Here is the balance that interdenominational work needs. Conviction without contempt, and freedom without licence. Paul says the one who eats should not despise the one who abstains, and the one who abstains should not judge the one who eats, for God has received both. Each is accountable to Christ, and Christ is able to make each stand.
Many denominational disputes are exactly this kind of question. They matter to the people involved. They should be discussed honestly from Scripture. But they are not the gospel, and they must never become the basis for dismissing a fellow believer. Where faithful Christians differ, we should say so plainly, argue without malice, and leave final judgment to the Lord who knows his own.
Galatians 3 and the end of status-based division
Galatians 3 announces something radical. Those who belong to Christ are all children of God through faith, and the divisions that define the ancient world, Jew and Greek, slave and free, male and female, no longer determine who is in. The old categories are not erased in their creaturely reality, but they no longer grant or deny access to God. Belonging is by faith in Christ Jesus, and by nothing else.
This is the deep logic of interdenominational fellowship. If God receives people on the basis of faith in his Son, then no tradition, nationality, denomination, or background can claim superior standing. Every believer is a son and heir by promise. That levels the ground completely and rules out the kind of pride that has fueled so much division.
The practical result is a family that is bigger than any one tradition. It does not mean every tradition is equally right on every point. It means every genuine believer is equally received by God, and must be received by us.
What 1 Corinthians 1:17 keeps at the centre
Paul writes that Christ sent him to preach the gospel, without words of human wisdom, so that the cross of Christ would not be emptied of its power. That sentence is the anchor for the whole passage. The Corinthians' divisions were not just social failures; they were hollowing out the cross. Whenever we make a leader, a style, or a tradition the centre, we crowd out the message that saves.
So the test of any interdenominational effort is whether the cross stays central. If the shared ground is a vague spirituality, the unity is worthless. If the shared ground is the crucified and risen Christ proclaimed from Scripture, the unity is real. Paul's rebuke and Paul's hope meet at the same point: the message of the cross, which is the power of God.
Biblical fidelity check
What 1 Corinthians 1:10-17 establishes is a command for believers to speak the same thing, to have no divisions, and to be united in mind and judgment, grounded in the name of the Lord Jesus and the preaching of the cross. It does not establish that every doctrinal disagreement is trivial, nor that denominations are inherently sinful, nor that unity requires abandoning conviction or merging structures. The passage addresses factions that rallied around human leaders and treated them as rival saviours.
A common misreading treats this text as a mandate for doctrinal indifference, as if Paul cared only about getting along. But the same letter corrects error sharply and later commands believers to be united in the same mind and judgment, which requires shared truth. Another misreading treats every denominational difference as a scandal equal to the Corinthian factions, ignoring that many differences concern secondary matters where Scripture leaves room. The faithful reading holds both: real unity in the gospel, and real honesty about what that gospel is.
Other passages that speak to 1 Corinthians 1:10-17
Several related passages and studies help place this text in its wider biblical setting. Paul's opening description of the Corinthians as called into fellowship with God's Son frames the appeal that follows, and you can read more in What Does 1 Corinthians 1:9 Mean? Context, Theology, and Application. For a close look at the command itself, see What Does 1 Corinthians 1:10 Mean? Context, Theology, and Application. The letter's opening chapters, where Paul confronts party spirit and boasts only in the Lord, are traced in 1 Corinthians 1: Called, United, and Boasting in the Lord. And for how the same letter handles Christian freedom and warning against presumption in the community, see 1 Corinthians 10: Warnings and Freedom.
Frequently asked questions
Does 1 Corinthians 1:10-17 forbid denominations?
It forbids factions that rally around human leaders and treat the church as a competition between them. Paul rebukes the Corinthian parties and grounds unity in the name of Christ and the cross. The text does not directly address later denominational structures, which arose from historical, linguistic, and doctrinal differences. Faithful Christians differ on whether such structures are wise, necessary, or regrettable. What the passage clearly forbids is prideful division over mere loyalty to teachers, and it clearly requires shared confession of the gospel and love between believers.
What is the difference between unity and uniformity?
Unity is shared life in Christ and a common confession of the gospel. Uniformity is sameness in forms, preferences, and secondary convictions. Paul commands unity of mind and judgment about the gospel, and Romans 14 shows genuine freedom on matters like food and days. Believers can worship in different styles, govern churches differently, and hold differing views on secondary questions while remaining one in Christ. Confusing unity with uniformity either forces unnecessary conformity or makes real disagreement look like sin when it is not.
How should I relate to Christians in other denominations?
First test whether they confess the crucified and risen Christ and submit to Scripture. Where they do, receive them as brothers and sisters, pray for them, and cooperate where conscience permits. Speak truthfully about real differences without contempt and without pretending agreement exists. Romans 14 tells us not to despise or judge one another, because each belongs to the Lord. Where faithful Christians differ on secondary matters, say so plainly, argue with humility, and leave final judgment to God, who alone knows his own.
