I dedicate this article to the men’s group that has taken me in. I owe them a great debt and thank my Lord daily for their fellowship!
In our modern world, we tend to run away from conflict. We see a disagreement on social media and we block the person. We feel a bit of tension in a friendship and we drift away. We’ve been taught that peace is the absence of friction. But the Bible gives us a very different picture of how humans are supposed to grow.
The famous proverb says, “Iron sharpens iron, so one man sharpens the face of his friend” (Proverbs 27:17, LSB).
When you hear that, it sounds poetic and nice. We put it on coffee mugs and gym t-shirts. But if you actually think about what happens when iron touches iron, it isn’t a gentle process. It is noisy. It is hot. It involves sparks. Most importantly, it involves friction. Without the rubbing of two hard surfaces against each other, nothing gets sharper; things just stay dull.
The Necessity of Spiritual Friction
To understand why God designed us to sharpen one another, we have to understand what it means to be “dull.” A dull blade is useless. It can’t cut through meat; it can’t clear brush. In a spiritual sense, being dull means having a mind that is sluggish, a heart that is complacent, or a theology that hasn’t been tested.
When we spend all our time with people who agree with us on every single minor detail, we don’t get sharper. We get comfortable. Friction happens when two people who love Jesus see things from different angles. It happens when your friend points out a blind spot in your character, or when you have a rigorous debate about a difficult passage of Scripture.
“For the sparks that fly in a holy dispute are better than the false peace of a silent grave.”
This friction isn’t a sign that the relationship is failing; it’s a sign that the relationship is working. If you never have moments of tension with your brothers and sisters in Christ, you might not be close enough to them to actually do any sharpening.
Don’t Let the Heat Divide You
The danger we face today is that we confuse friction with division.
In a blacksmith’s shop, friction is a tool for improvement. In our pride, however, we often turn friction into a reason for separation. We think, “If they don’t see it exactly my way, they are the enemy.” But the Bible calls us to a different standard. We are told to be “diligent to keep the unity of the Spirit in the bond of peace” (Ephesians 4:3, LSB).
Unity does not mean uniformity. You can have two pieces of iron that are shaped differently, but they still serve the same Master. The heat of a disagreement should melt away our pride, not burn down the bridge of fellowship. If we let every minor disagreement over “non-essential” issues divide us, we end up alone and, eventually, very dull.
The Only True Divider: The Gospel
If we aren’t supposed to let friction divide us, does that mean anything goes? Not at all. There is one thing—and truly only one thing—that is meant to be a line in the sand: The Gospel of Jesus Christ.
The Gospel is the news that Jesus Christ, the Son of God, died for our sins according to the Scriptures, was buried, and rose again on the third day. It is the message of grace alone, through faith alone, in Christ alone. As the Apostle Paul warned the Galatians, if anyone preaches a gospel contrary to what was received, “let him be accursed” (Galatians 1:8, LSB).
This is the only topic worth dividing over. If someone denies the deity of Christ, the physical resurrection, or the necessity of faith for salvation, there is no “sharpening” to be done—there is a fundamental separation. The Gospel is the foundation. If the foundation isn’t the same, you aren’t building the same house.
However, once we agree on the Gospel, everything else changes. If we are both saved by the blood of Christ, then we are family. And family doesn’t kick each other out because of a disagreement over the end times, or how to run a church meeting, or specific political preferences. These are not “salvation issues.”
Logic, Reasoning, and the “Back-and-Forth”
How do we actually sharpen one another? It isn’t through blind emotion or just shouting louder than the other person. It happens through logic and reasoning.
God gave us minds. He invites us to use them. In the book of Acts, we see the early Christians constantly “reasoning” from the Scriptures. They didn’t just have “vibes”; they had arguments based on truth.
“And according to Paul’s custom, he went to them, and for three Sabbaths reasoned with them from the Scriptures” (Acts 17:2, LSB).
Sharpening requires a “back-and-forth.” It requires you to state your case, listen to the counter-argument, and compare both to the Word of God. This process requires humility. You have to be willing to be wrong. If you enter a conversation only wanting to win, you aren’t iron sharpening iron; you’re just a hammer trying to smash a nail.
The goal of our logic and reasoning should be to find the truth together. We should be like the Bereans, who were “examining the Scriptures daily to see if these things were so” (Acts 17:11, LSB).
Learning from the Apostolic Fathers
The early church understood this balance well. They fought hard for the essentials of the faith, but they also recognized the bond of the Spirit.
Clement of Rome, writing in the first century, urged the church to put away “fruitless talk” and return to the “glorious and venerable rule of our tradition.” He understood that our focus must remain on the high calling of Christ. Likewise, Ignatius of Antioch emphasized that while the church must be unified under the truth of Christ, the internal life of the believer is one of constant growth and testing.
These men faced intense pressure and even death, yet they prioritized the purity of the Gospel above all else. They didn’t have time to divide over trivial matters because they were too busy making sure the world knew who Jesus was.
Conclusion: Stay on the Anvil
If you feel the heat today—if a brother or sister is challenging you, or if you are in the middle of a tough theological debate—don’t run away. As long as the Gospel is the center, the friction you feel is a gift.
Don’t let the sparks divide you. Let them refine you. We need each other to stay sharp. We need the back-and-forth of honest, biblical reasoning to keep us from falling into error or laziness.
Hold fast to the Gospel. Be unmovable on the person and work of Jesus. But on everything else? Be a student. Be a friend. Be a piece of iron that isn’t afraid of a little heat. That is how we grow into the image of Christ, one spark at a time.
“Iron sharpens iron.” Let the sharpening begin.
M.J. Kelley II