Get Salty
Moral purity is not the Gospel.
Every politician in America has called their voters “salt of the earth people” at least once. It’s a compliment that means almost nothing. Good, honest, hardworking. The kind of folks who don’t overcharge you and show up when they say they will. My mechanic is a salt of the earth guy. My neighbor is salt of the earth. It’s become shorthand for decent and unremarkable.
“Let your light shine” has fared about the same. When I was young, I heard it almost exclusively as a behavior management tool. My dad would say it and what I heard was: stop doing the thing that’s making me angry, or there will be consequences. In youth group it meant something slightly different but equally thin. Go tell somebody about Jesus. Be a good witness. Don’t embarrass the faith.
Both of these are fine, as far as they go. Nobody’s against honesty or good behavior. But somewhere along the way, we took two of Jesus’s most potent metaphors and turned them into Hallmark cards.
What Salt Actually Does
Salt preserves. Salt seasons. Those are the two functions we tend to remember. But salt is a powerful chemical compound. It melts ice. Dissolve it in water and it conducts electricity. It disinfects. Before Neosporin, if you got a wound, you packed it with salt. Nobody likes rubbing salt in a wound, but it works. It accelerates healing and kills infection.
Salt changes the fundamental properties of whatever it touches. Ice becomes water. Raw meat becomes preserved. A bland dish becomes worth eating. An open wound becomes hostile to bacteria. Salt is an agent of transformation, not decoration.
So when Jesus tells his followers “you are the salt of the earth,” he is not handing out a compliment about their character. He is describing their function. In a world wounded by sin, infected by the reality of death, scarred by human brokenness: you are the compound God is using to heal it. You are how God preserves what is good and purifies what has been corrupted. That is a far cry from “my constituents are good, hardworking Americans.”
What Light Actually Does
We have a phrase: “shed light on the matter.” It means to make something clear, understandable. Light causes hidden things to come into the open. It clarifies what has been obscured.
But light does more than clarify. Where light is, darkness cannot remain. Period. Light doesn’t negotiate with darkness or politely ask it to leave. It displaces it by existing. And in displacing it, light exposes what was hidden in it. In the Gospel of John, Jesus says those who do evil prefer darkness because light reveals what they’re doing. There’s a reason we associate crime with darkness and react with shock when someone does something terrible in broad daylight. The audacity. You’re supposed to do shady things under cover of shadow.
And light finds. People left in dark corners because they weren’t considered important enough to illuminate. The ones nobody bothers to look at. When light enters a room, it touches everything, and the people who have been shoved to the margins suddenly become visible. That visibility is itself an act of justice.
So when Jesus says “let your light shine before others” and talks about putting a lamp on a stand so it lights the whole house, he is issuing a mission. Illuminate the darkest places. Expose what the powers would prefer to keep hidden. Find the people left in the dark. Reducing this to “be a good example” is like saying a searchlight’s purpose is to look nice on top of the building.
The Reduction Problem
Here’s what concerns me. For a long time, the Christian life has been described as a choice between two paths: the path of life and the path of destruction, the way of Jesus and the way of the world. The earliest Christians called their practice simply the Way. Jesus himself said the road to destruction is wide and many travel it, while the road to life is narrow.
That framework is good and true. The problem is what we’ve done with it. We’ve reduced the straight and narrow to a behavioral checklist. “Stay on the straight and narrow” has become English for “keep your nose clean.” The two paths become a question of personal morality: are you being good, or are you being bad?
And once we make that move, the whole gospel collapses into self-improvement. Follow Jesus’s example. Try harder. Be better. Set a good example so others will be good too. A tidy moral ecosystem that requires absolutely nothing from God except maybe an encouraging word now and then.
If that’s all the gospel is, if the point is simply to make us all into good, honest, hardworking people, then the cross was unnecessary. You can achieve basic decency without a crucifixion. But we keep making the reduction anyway, because a gospel graded on a curve we understand is a gospel we can manage, a gospel that doesn’t terrify us.
The Foolishness of God
The Corinthian church had the same instinct, just a different grading rubric. They weren’t reducing the gospel to moralism. They were reducing it to rhetoric, measuring it by whether it impressed people. And Paul told them plainly: I didn’t come to you with a slick presentation. No lofty rhetoric, no impressive program. I came determined to know nothing among you except Jesus Christ and him crucified. The source of your faith, Paul said, is not human wisdom. It is the power of God.
And Paul knew why this mattered, because he’d watched what happens when people try to process the gospel through conventional wisdom. The rulers of this age had done exactly that. They looked at Jesus and ran him through every category they had. And every category said: fool, threat, disposable. So they killed him. If the people running the world had actually understood what they were looking at, if they had grasped that this man was the wisdom of God walking among them, they would never have crucified the Lord of glory. But worldly wisdom is one-dimensional. It can only recognize power it already understands.
God’s wisdom runs so counter to the way of the world that we can’t even recognize it as wisdom. We see foolishness. A crucified Messiah. A kingdom that comes through suffering. Power made perfect in weakness. The whole thing looks absurd from the vantage point of reason.
But the foolishness of God outdoes the wisdom of humanity. Every time.
The Real Invitation
God’s kingdom runs on foolishness. A logic that counters every worldly instinct. If we are to be agents of that kingdom, if we are to bring the purifying, wound-healing power of salt into a world infected by sin and carry light into places that have been kept deliberately dark, we need to become utterly foolish, consumed by the sheer madness of who Jesus is.
But, if we’re on the path that leads to life, the straight and narrow way, how can we do all these foolish things that Jesus invites us to do?
Consider the road. We tend to picture those two paths, the way of life and the way of destruction, separated by a wide margin. The narrow way over here, the wide way far over there. Two lanes with a giant median between them. But maybe they’re closer than we think. Maybe they run parallel, close enough that they have no secrets. And maybe the light we carry as we walk the path of life is bright enough to illuminate the other road too. Bright enough to show the people walking it exactly what is so destructive about where they’re headed. Bright enough that they can see, for the first time, that there’s another way.
That changes what we’re doing out here. We aren’t walking in isolation, keeping our heads down, trying to stay morally clean until we reach the finish line. We are walking with a light that bleeds across the boundary. A light that, if we actually let it shine, makes the darkness on that other road intolerable.
God so loved the world that God took the most foolish step imaginable and came into it. Showed us the path that leads to life. And even though we killed him for it, he rose. Victorious. Overcoming the power of sin completely so the light of life could shine here, in the valley of the shadow of death.
So let your light shine. Get a little salty. The invitation was never to become better-behaved. It was to become bearers of a light that darkness cannot overcome.