11. The Error of Legalism (Nomism)
The Error of Legalism (Nomism) L egalism—or nomism—comes in many forms, but its essence is this: it places part (or all) of the responsibility for salvation on human shoulders. Whether subtly or openly, it teaches that we must contribute to our salvation—whether by our will, our faith, our repentance, or our perseverance. In this view, Christ opens the door, but we must walk through it and keep ourselves in.
But this idea weakens the finished work of Christ. If salvation ultimately depends on us, then Christ has not truly accomplished salvation, but merely made it possible. His work is reduced to one part of a larger process— alongside our own efforts. He is no longer our all-sufficient Redeemer, but simply a guide or helper along the way.
This view puts Christianity on the same level as every other human religion: a moral system that urges people to save themselves with God's help. It blurs the line between grace and works, gospel and law, and leaves the burden of salvation on the sinner's back.
Why This Undermines Assurance
Legalism also destroys the certainty and comfort of faith. If my salvation depends on my performance—on my faith, obedience, or perseverance—how can I ever be sure? Even my best works are stained with sin. And if grace is something I can resist or lose, I am left with constant fear and insecurity. At any moment, I could fall away.
This leaves people relying not on Christ, but on the church, on religious leaders, or on their own works—none of which can give true assurance.
Without the clear teaching that salvation is of the Lord, the Christian life becomes uncertain, unstable, and anxious. There is no confident resting in God's promises. Even the outcome of history becomes uncertain, as the kingdom of God is made to depend on the fragile will of man.
What the Gospel Really Offers In contrast, Scripture proclaims a gospel of sovereign grace. Christ did not merely make salvation possible; He accomplished it. He didn't die to give us a chance to be saved, but to actually save His people (Matthew
1:21). The Spirit doesn't merely offer help; He gives new birth, grants faith, and preserves us to the end.
Yes, we are called to believe and repent. But even these responses are the result of God's work in us. As Paul says, "It is God who works in you, both to will and to work for His good pleasure" (Philippians 2:13). And we are called to "work out our salvation with fear and trembling" (v.12)—not because salvation depends on us, but because it is so holy and glorious a gift that it humbles us deeply.
In the true order of salvation, Christ is everything. From election to glorification, God is the author and finisher of our faith (Hebrews 12:2).
And because our salvation rests on Christ and not ourselves, we can have true assurance, lasting peace, and joyful obedience.
Two Dangerous Errors in the Way of Salvation The errors of a works-based religion—or rationalistic nomism—are easy enough to spot. But these same errors can also wear religious clothing.
Even within movements like Pietism and Methodism, which began as efforts to revive spiritual life, similar problems can emerge.
At first, these movements sought not to change the doctrine of the Reformation but to awaken people to live it out. Their intent was good: to shake off a lifeless orthodoxy and call believers to a vibrant walk with God.
But in their zeal, they often swung too far, focusing not on what Christ had done for us, but on what we must feel and experience.
In these circles, salvation was still by grace—but the spotlight shifted from Christ's finished work to the believer's own inner journey. Instead of urging people to trust in Christ, they were often encouraged to look inward: to examine their feelings, measure their repentance, and test the genuineness of their conversion. For many, the Christian life became a long and difficult road of self-examination before they could dare to believe they were truly saved.
Methodism tried to compress this process—conversion, faith, and assurance—into one powerful moment. But it still treated salvation as something to be proven in the heart before it could be received by faith.
In both cases, the role of the Holy Spirit was largely misunderstood or neglected. There was little appreciation for how God, through His Spirit, prepares hearts by grace, works regeneration, and unites creation and recreation. The Christian life became disconnected from everyday life—either retreating from the world in pious separation or entering the world in activism, yet without grounding in the full work of redemption. Faith became more about emotional experience than rooted trust in Christ.
Instead of transforming every part of life—family, society, work, art, culture—the Christian was seen as someone who lived outside the world, not in it. The great Reformation truth of grace overcoming sin was replaced by a Catholic-like division between the "natural" and the "spiritual." The vibrant, grateful obedience of Puritanism was replaced by religious withdrawal or rule-based asceticism, where holiness was measured by what one avoided rather than by joyful service to God in every sphere of life.