1 John 3:9 — No one born of God makes a practice of sinning¶

The text. "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." (1 John 3:7-9, ESV)

The OSAS reading¶

This is a key text for classical Reformed perseverance, and its logic is strong.

The new birth is a real, permanent change. "God's seed abides in him" — the seed is the life-giving word of God (compare 1 Pet 1:23; James 1:18), and it remains in the regenerate. The new nature is not a temporary mood.
The result is that the born-of-God person "cannot keep on sinning." The Greek present tense describes an ongoing practice, and the "cannot" is emphatic. A genuine believer may stumble, but he cannot settle into sin as a way of life.
Therefore the new birth guarantees perseverance. If the seed abides and the regenerate cannot persist in sin, then a true believer cannot finally apostatize. The verse is a bulwark against the fear that a real Christian might be lost.
This is why assurance can be grounded in the new birth rather than in fluctuating feelings. The person who has been born of God has a permanent principle of life within him, and that principle will prevail.

The casebook affirms this. The question is what the verse is doing — whether it guarantees perseverance or tests authenticity.

The problems¶

1. The present tense is habitual, not occasional¶

The ESV translates hamartanei as "makes a practice of sinning," and that is a fair rendering of the present tense in this context. John is describing a settled pattern, not a single act. The same letter says, "If we say we have no sin, we deceive ourselves" (1:8), and "if anyone does sin, we have an advocate with the Father" (2:1). John expects believers to sin and to confess.

So 3:9 cannot mean that a regenerate person never commits a sin. It means that sin is not the ruling pattern of his life. The new birth changes the direction of the life, not the sinlessness of every moment.

2. "Cannot" is moral inability, not absolute necessity¶

The new life cannot be at home in sin. That is the force of "he cannot keep on sinning": the seed of God in him resists the practice. But this is a statement about what the new nature cannot do as a settled orientation, not a promise that the person will never fall in a moment of weakness.

The same letter acknowledges a "sin that leads to death" (5:16-17) and ends with the command, "Little children, keep yourselves from idols" (5:21). If the born-of-God person were absolutely incapable of any serious sin, those passages would be unintelligible. The "cannot" is real, but it is the impossibility of sin being the family likeness, not the impossibility of any failure.

3. The verse is a test, and tests are for examination¶

The surrounding paragraph draws a line: "By this it is evident who are the children of God, and who are the children of the devil" (3:10). John is giving the community a way to discern. A test is for examination, not for presumption.

If 3:9 guaranteed that every regenerate person would inevitably persevere, the test would be unnecessary: anyone could look back at a conversion and conclude he is safe. But John says, in effect, "Look at the direction of your life." The test is meant to be used, and its negative side is as real as its positive side.

4. The verse supports self-examination, not presumption¶

The abiding point of 3:9 is that persistent sin contradicts the new birth. That is not a threat to the struggling believer, who grieves over sin and confesses it; it is a warning to the presumptuous person, who has made peace with sin and treats grace as permission.

The verse therefore belongs with 1:9 and 2:1, not against them. The Christian who falls can confess and be forgiven. The Christian who settles into sin has reason to ask whether the seed is really there. John turns the test into neither sinless perfection nor a guarantee that makes the test pointless.

5. The context is love, hatred, and the family likeness¶

The paragraph is not an abstract treatise on perseverance. It contrasts righteousness and sin, love and hatred, Cain and Abel (3:11-18). The "practice of sinning" is a life orientation, exemplified by Cain's murder and the world's hatred of the church. John's concern is the community's holiness and love.

The verse tells us what the family of God looks like: the family likeness is real and visible. It does not guarantee that every genuine beginning ends well.

The abiding reading¶

First John 3:9 is a wonderful verse about the reality of the new birth. God does not leave his children as they were. He implants a seed, gives a new nature, and produces a new direction. The person who has been born of God is not the same person he was.

The verse is also a call to honesty. Persistent sin is not a minor flaw in a Christian; it is a contradiction of the life that has been planted in him. John puts the test in front of us not to make us despair but to make us examine ourselves rightly. The struggling believer can look at his grief over sin and his turning back to Christ and take heart. The presumptuous believer should look at his settled pattern and tremble.

And the verse is a call to hope. The Son of God appeared "to destroy the works of the devil" (3:8), and he will finish what he began. The seed abides. The new life is real. The direction of the life is the evidence, and the evidence points to the God who produces it.

What this does and does not prove¶

It proves: that the new birth produces a real change of direction; that persistent sin is incompatible with the new life; that assurance can be grounded in the fruit of the new birth; and that self-examination is a Christian duty.

It does not prove: that believers never sin, that a single failure forfeits salvation, or that every regenerate person will inevitably persevere apart from continuing faith. The verse describes the family likeness; it does not remove the need for the warnings that call the family to remain.