The Children of God and the Children of the Devil

What New Birth Actually Changes

There is a question that haunts every serious Christian at some point: If I still sin, how do I know I truly belong to God?

The question isn't theoretical. It rises in the quiet aftermath of failure, in the gap between who we want to be and who we actually are. We confess and fall again. We resolve and stumble. And somewhere in the repetition, doubt creeps in. Maybe nothing has really changed. Maybe the faith we profess is just another layer of self-deception.

John addresses this anxiety head-on in one of the most challenging passages in his first letter. His words are stark, even startling. But rightly understood, they offer clarity, not condemnation, a way to distinguish between the struggles of genuine faith and the settled patterns of spiritual death.

1 John 3:4-10: "Everyone who makes a practice of sinning also practices lawlessness; sin is lawlessness. You know that he appeared to take away sins, and in him there is no sin. No one who abides in him keeps on sinning; no one who keeps on sinning has either seen him or known him. Little children, let no one deceive you. Whoever practices righteousness is righteous, as he is righteous. Whoever makes a practice of sinning is of the devil, for the devil has been sinning from the beginning. The reason the Son of God appeared was to destroy the works of the devil. No one born of God makes a practice of sinning, for God's seed abides in him; and he cannot keep on sinning, because he has been born of God. By this it is evident who are the children of God, and who are the children of the devil: whoever does not practice righteousness is not of God, nor is the one who does not love his brother."

Sin Unmasked

John begins by stripping sin of its disguises: "Everyone who makes a practice of sinning also practices lawlessness; sin is lawlessness" (3:4).

This definition cuts deeper than we might expect. Sin isn't merely breaking rules or falling short of standards. It's lawlessness, a fundamental posture of rebellion against God's rightful authority. The Greek word anomia carries the sense of living as though no law applies, as though the self is its own final court of appeal.

This is the essence of sin from Eden forward. The serpent's original temptation wasn't primarily about fruit but about authority: "You will be like God, knowing good and evil" (Genesis 3:5). Sin at its root is the declaration of independence from the One who made us. It's the creature positioning itself as creator, the clay instructing the potter.

John's audience needed this clarity. False teachers had infiltrated the community, some apparently suggesting that sin didn't matter for those with spiritual enlightenment. Perhaps they taught that the body's actions were irrelevant to the soul's condition. John demolishes such thinking. Sin is never trivial. It is always, at its core, a rejection of God's rule.

Why Christ Appeared

Against the dark backdrop of sin, John sets the blazing purpose of the incarnation:

"You know that he appeared to take away sins, and in him there is no sin" (3:5).

The Son of God entered human flesh not merely to teach or to demonstrate divine love, though he did both, but to deal decisively with the sin that had separated humanity from God. The sinless One came to take away sins. The phrase echoes John the Baptist's declaration: "Behold, the Lamb of God, who takes away the sin of the world" (John 1:29).

This is the gospel in compressed form. Christ bore what we could not bear. He carried what we could not carry. And in his death and resurrection, he broke sin's power over all who trust in him.

But John presses further: "The reason the Son of God appeared was to destroy the works of the devil" (3:8). The incarnation was cosmic warfare. Christ came not simply to forgive sins but to demolish the entire edifice of evil: the structures of death, deception, and destruction that the devil had been building since he first whispered lies in the garden.

The cross was the decisive battle. There, what looked like defeat became victory. There, the powers of darkness overreached and were undone. As Colossians declares, Christ "disarmed the rulers and authorities and put them to open shame, by triumphing over them" in the cross (Colossians 2:15). The works of the devil, accusation, bondage, death itself, were destroyed by the very sacrifice that seemed to seal Satan's triumph.

The New Nature

Now John makes his most striking claim: "No one born of God makes a practice of sinning, for God's seed abides in him; and he cannot keep on sinning, because he has been born of God" (3:9).

These words have troubled sensitive consciences for centuries. If no one born of God keeps on sinning, and I still sin, then perhaps I'm not born of God at all.

But John's language is precise, and the precision matters. He speaks not of isolated acts but of settled practice. The verb tenses throughout this passage indicate continuous, characteristic action. John isn't saying that believers never sin; he's already addressed that reality earlier in his letter: "If we say we have no sin, we deceive ourselves" (1:8). What he's saying is that believers cannot live in sin as their defining pattern.

The reason is profound: "God's seed abides in him." Something has been planted that cannot be uprooted. The new birth isn't mere moral improvement or religious commitment. It's the implantation of divine life itself. Just as physical birth transmits the parents' nature to the child, spiritual birth transmits God's nature to the believer.

This seed is transformative. It cannot coexist peacefully with sin. Where God's life takes root, sin becomes increasingly foreign, increasingly uncomfortable, increasingly intolerable. The believer who falls into sin doesn't settle there contentedly. Something within rises up in protest. The Spirit convicts. The conscience accuses. The soul grows restless until repentance comes.

Jonathan Edwards captured this reality: "Grace is not a static quality but a living principle that moves the soul toward God." The seed is alive. It grows. It bears fruit. And it makes the continued practice of sin impossible, not because believers become incapable of sinning, but because they become incapable of remaining in sin as their home.

Two Families: Children of God and Children of the Devil

John draws the line with unmistakable clarity: "By this it is evident who are the children of God, and who are the children of the devil: whoever does not practice righteousness is not of God, nor is the one who does not love his brother" (3:10).

There are only two families in John's reckoning. Two lineages. Two spiritual DNA strands working themselves out in human lives. The children of God bear the family resemblance through righteousness and love. The children of the devil bear theirs through lawlessness and hatred.

There are only two families in the eyes of God: Those born of Him and those born of the Devil.

This binary may offend modern sensibilities that prefer spectrums and gradations. But John isn't interested in nuance that obscures reality. The stakes are eternal. And the evidence, while not always immediately obvious, eventually becomes unmistakable. Trees are known by their fruit.

Notice that John pairs righteousness with love. These aren't separate tests but two expressions of the same transformed nature. Righteousness bends our lives toward God's standards; love bends our lives toward God's people. Where one is absent, we should question whether the other is genuine. A person who claims to follow God's commands while hating their brother has not understood either God or his commands.

Living as Children

So what do we do with this passage?

First, we resist the temptation to soften John's words into meaninglessness. He means what he says. Persistent, unrepentant, comfortable sin is incompatible with genuine faith. If someone claims to know Christ while living in settled rebellion, John would say they are deceived, or deceiving.

But second, we refuse to let this passage crush tender consciences. The very fact that you're troubled by your sin is itself evidence of the Spirit's work. The children of the devil aren't bothered by their lawlessness; they celebrate it or excuse it. But God's children grieve over sin. They fight against it. They confess it and return, again and again, to the fountain of grace.

The question isn't whether you've sinned since coming to faith. The question is whether sin has become your settled residence or your persistent enemy. Do you make peace with it, or do you make war against it? Do you defend it, or do you hate it even as you struggle against it?

John Calvin put it simply: "The children of God are not distinguished by never sinning, but by groaning under the burden of sin and continually striving against it."

The seed abides. What God plants, he tends. What he begins, he completes. The same Christ who appeared to take away sins continues his work in everyone who trusts him. You are not left to transform yourself by willpower. The life within you is his life. The power at work in you is resurrection power.

So take heart. The struggle itself is proof of life. And the One who began this work will see it through to the end.