The Test of Love Across Difference

Today's Scripture

Hours before the cross, Jesus prayed for the people who would believe through the apostles' message. That includes you.

John 17:20-21 — "I do not ask for these only, but also for those who will believe in me through their word, that they may all be one, just as you, Father, are in me, and I in you, that they also may be in us, so that the world may believe that you have sent me."

Romans 14:4 — "Who are you to pass judgment on the servant of another? It is before his own master that he stands or falls. And he will be upheld, for the Lord is able to make him stand."

Romans 15:7 — "Therefore welcome one another as Christ has welcomed you, for the glory of God."

The Big Idea

After eight days about division, today is about the other muscle: loving real Christians who differ from you — in your pew and across denominations. Jesus prayed that his people's unity would be visible enough to convince the world. That unity is not sameness. It is strong conviction and strong love held at the same time, the way Jesus holds both about us.

Reflection

The prayer Jesus prayed about you

On the worst night of his life, with betrayal hours away, Jesus spent part of his last free evening praying — about us. John 17:20-21: "for those who will believe in me through their word, that they may all be one... so that the world may believe that you have sent me."

Read the logic carefully. The world is supposed to conclude that the Father sent the Son by watching how Christians love each other. Jesus said the same thing at dinner that night: John 13:34-35 — "just as I have loved you, you also are to love one another. By this all people will know that you are my disciples, if you have love for one another." Our love for each other is the evidence Jesus chose to leave with the world. Not our buildings, our arguments, or our voting blocs. Our love.

Now be honest: is that what the world sees? It sees a thousand denominations — a denomination is simply a family of churches that shares a name and a way of doing things — plus comment-section wars and Christians who speak of other Christians with contempt. We should feel the weight of that. Jesus prayed for something, and we are, visibly, not it.

But notice what Jesus did not pray for. He did not ask that we be identical — "one just as you, Father, are in me, and I in you." The Father and the Son are not the same person; they are one in love, purpose, and life. The unity Jesus requested is unity-in-love across real difference. Which means the cure for our division is not pretending we all agree. It is something harder.

The hall and the rooms

C.S. Lewis built Mere Christianity on exactly this problem. He was an Anglican writing for everyone, and he refused to sell his own brand:

"I am not writing to expound something I could call 'my religion,' but to expound 'mere' Christianity, which is what it is and was what it was long before I was born and whether I like it or not." — C.S. Lewis, Mere Christianity

"Mere" here doesn't mean small. It means the core — the faith shared by all Christians everywhere: one God, Christ crucified and risen, salvation by grace, the creeds. Then Lewis gave his famous picture of the church:

"It is more like a hall out of which doors open into several rooms. If I can bring anyone into that hall I shall have done what I attempted. But it is in the rooms, not in the hall, that there are fires and chairs and meals." — C.S. Lewis, Mere Christianity

The hall is the shared faith. The rooms are the traditions — Baptist, Anglican, Presbyterian, Pentecostal, and the rest. You cannot live in the hall; you need a room, with its fires and chairs and meals. But everyone in every room got in through the same hall. And Lewis noticed something strange and wonderful about the people deepest inside their rooms:

"It is at her centre, where her truest children dwell, that each communion is really closest to every other in spirit, if not in doctrine." — C.S. Lewis, Mere Christianity

Holiness has a family resemblance. The most prayerful, repentant, Christ-soaked believers from different traditions recognize each other almost instantly — often more than they recognize the lukewarm in their own room.

Jesus's own disciples needed this lesson. Mark 9:38-40 — John reports: "Teacher, we saw someone casting out demons in your name, and we tried to stop him, because he was not following us." Hear the revealing word: not following us. Not "not following you" — not following our group. Jesus answers, "Do not stop him... For the one who is not against us is for us." The disciples' instinct — shut down anyone outside our circle — got overruled by the Lord himself.

The floor and the ceiling

So does difference just not matter? No — and Romans 14 is where Paul shows us how to hold this without going mushy.

The Roman church really disagreed — about food, holy days, the leftover rules of the law. Paul's answer is not "take a vote" or "split into two churches." It is Romans 14:1 — "As for the one who is weak in faith, welcome him, but not to quarrel over opinions" — and Romans 14:4 — "Who are you to pass judgment on the servant of another? It is before his own master that he stands or falls." Both sides answer to the same Master. Neither side gets to play master over the other.

A line from the 1600s — so good it usually gets credited to Augustine, though it was likely coined by a Lutheran pastor named Rupertus Meldenius — compresses Romans 14 into nine words:

"In essentials, unity; in non-essentials, liberty; in all things, charity." — Rupertus Meldenius

Picture a house. There is a floor of fellowship — the gospel itself, the essentials. Go below it, and you are no longer dealing with Christianity (that was the Galatians 1 and Barmen territory of earlier days). And there is a ceiling — your tradition's distinctives, your room's furniture. The deadly mistake is collapsing the two: treating your ceiling as if it were the floor, so that anyone who doesn't share your view of baptism ages, worship music, or the end times is treated as below the gospel itself. Christians who do that manufacture the fragmentation Jesus prayed against. 1 Corinthians 12:21 forbids the move: "The eye cannot say to the hand, 'I have no need of you.'"

John Wesley — who had sharp convictions and defended them in print all his life — modeled the alternative:

"Though we cannot think alike, may we not love alike? May we not be of one heart, though we are not of one opinion? Without all doubt, we may." — John Wesley, Sermon 39, 'Catholic Spirit'

This applies inside a single congregation, not just between denominations. The couple who wants more hymns and the couple who wants more new songs. The elder who reads the end times one way and the elder who reads it another. The family that homeschools and the family that doesn't. Romans 14 sits over all of it: welcome, don't quarrel; convictions held fully, judgment handed back to the Master. Not every difference must be resolved. Many must simply be borne, in love, until the harvest.

Not think alike — love alike. That is Ephesians 4:2-3 in practice: "with all humility and gentleness, with patience, bearing with one another in love, eager to maintain the unity of the Spirit in the bond of peace." Notice: maintain, not manufacture. The unity already exists, made by the Spirit. Our job is not to create it but to stop wrecking it.

Welcomed people welcome people

Here is the gospel engine under all of this, because "be more charitable" is just another exhausting law without it.

Romans 15:7 — "Therefore welcome one another as Christ has welcomed you, for the glory of God." The command runs on a memory. How did Christ welcome you? Not after you got your doctrine perfect. Not because your tradition was the best one. He welcomed you while you were wrong about a hundred things — and he knew it. Tim Keller's summary of the gospel explains why that changes how we treat differing Christians:

"The gospel is this: We are more sinful and flawed in ourselves than we ever dared believe, yet at the very same time we are more loved and accepted in Jesus Christ than we ever dared hope." — Tim Keller, The Meaning of Marriage

A person who really believes the first half cannot be a snob toward other rooms in the hall — I am more flawed than I dared believe, so some of my confident opinions are surely wrong, and I do not yet know which. A person who believes the second half does not need their tribe to win to feel secure. That is Philippians 2:3-5: "Do nothing from selfish ambition or conceit, but in humility count others more significant than yourselves... Have this mind among yourselves, which is yours in Christ Jesus."

And Bonhoeffer reminds us the unity itself is not our project to complete:

"Christian brotherhood is not an ideal which we must realize; it is rather a reality created by God in Christ in which we may participate." — Dietrich Bonhoeffer, Life Together

You do not have to build the family. Christ built it with his blood. You did not choose your siblings, and they did not choose you; he chose all of you, on purpose, knowing exactly how you would get on each other's nerves. Your only job is to stop disowning them. One day the hall and all the rooms open into a single feast, and everyone there will have been welcomed on exactly the same terms: grace. The practice for that day starts now, with the Christian you find hardest to claim.

Going Deeper

Pick one Christian "room" you instinctively look down on. This week, take in one thing from its center, not its worst examples: a Catholic reading Spurgeon, a Baptist praying a prayer from the Book of Common Prayer, a Presbyterian listening to a sermon from a healthy Pentecostal church. As you do, ask one question: "What does this part of the family see about Jesus that my room underlines less?" You are not switching rooms. You are learning the size of the hall.