What is the sin unto death in 1 John 5:16-17?

Question 07009.

The sin unto death in 1 John 5:16-17 is one of those phrases that people trip over at the very end of a letter otherwise full of comfort, and it stops them dead. John has spent five chapters telling his readers how they may know that they have eternal life, and then, almost in passing, he mentions a sin that leads to death and says he is not telling them to pray about it.

So what is going on? I want to take the verse in its own setting, look at how the New Testament elsewhere speaks of believers dying under discipline, and explain why I do not think the sin unto death has anything to do with losing your salvation.

What John Actually Writes

1 John 5:16-17 says that if anyone sees his brother committing a sin not leading to death, he shall ask, and God will give him life, for those whose sin does not lead to death. There is sin that leads to death; John does not say that one should pray for that. Then he adds that all wrongdoing is sin, but there is sin that does not lead to death.

Notice the word brother. John’s whole scenario is set inside the family of God. He is describing one believer seeing another believer sin and interceding for him. That framing already rules out a good many popular explanations, because whatever the sin unto death is, it is committed by someone John is willing to call a brother.

Notice also what John does and does not say. He does not forbid prayer in the second case. He says he is not telling you to pray about that one, which is a good deal gentler than a prohibition, and rather more like a minister saying, I would not push that particular request.

Which Death Does John Mean?

Everything turns on this. If death means eternal separation from God, then the passage teaches that a believer can be lost, and it collides head on with John 10:28 and with John’s own statement three verses later that whoever is born of God is kept and the evil one does not touch him. John does not contradict himself in the space of a paragraph.

If death means physical death, everything fits. The New Testament repeatedly speaks of believers whose lives were cut short under God’s hand. 1 Corinthians 11:30 says that because of the way the Corinthians were treating the Lord’s Supper, many among them were weak and ill, and a number had died. Paul is writing to Christians. He is describing the Father’s discipline reaching its most serious form.

Ananias and Sapphira in Acts 5 are the sharpest example. Whatever we make of their spiritual state, Luke presents them as part of the believing community, and their deaths were immediate and disciplinary. Nothing in the account suggests they were sent to hell. It suggests they were sent home early.

Why I Read the Sin Unto Death as Discipline

Hebrews puts the principle plainly: the Lord disciplines the one he loves, and he disciplines us as sons. Discipline is a family word. It is not what a judge does to a criminal; it is what a father does to a child, and the aim is always restoration.

But discipline can escalate. If a believer will not respond to correction, and their continued conduct is doing serious damage to the testimony of the church, God may remove them. That is not a loss of salvation. It is the shortening of a life. Paul says as much in 1 Corinthians 5:5, where the offender is handed over so that his spirit may be saved in the day of the Lord. The spirit is saved; the flesh is not spared.

So I take the sin unto death as sin persisted in by a believer to the point where the Father brings the earthly chapter to a close. It is a terrible mercy. It ends the damage, and the person concerned wakes up in the presence of Jesus.

What the Sin Unto Death Is Not

It is not the unforgivable sin of Matthew 12. That was committed by unbelieving religious leaders who attributed the Spirit’s work to Satan, and I have set it out in what the unforgivable sin is. John’s scenario involves a brother.

It is not the falling away of Hebrews 6 either, which I take up in what Hebrews 6 teaches about falling away. These three passages get bundled together far too often, and the bundling frightens people who ought to be comforted.

And it is not a particular named offence. John gives no list, and I am not going to supply one. Attempts to identify the sin unto death with a specific act, whether adultery, apostasy, suicide or anything else, go well beyond the text. What Scripture leaves open we should leave open.

A Word About the Greek

John writes of hamartia pros thanaton, sin towards death. The preposition pros carries the sense of direction, of tending towards an outcome, rather than of a fixed legal sentence. That nuance is worth having, because it suggests a trajectory rather than a category. Some sin, persisted in, is heading somewhere. The word for death here is the ordinary term thanatos, which the New Testament uses of physical death far more often than of anything else.

John also chooses his family language carefully throughout the letter. He calls his readers little children, and the person in view in verse 16 is a brother. If John had wanted to describe an outsider, he had perfectly good words available and he used them elsewhere in the same letter when he wrote about those who went out from us because they were not of us.

None of this settles the question by itself, and I would not want to build a doctrine on a preposition. But the grammar leans in the same direction as the wider teaching of Scripture, and when grammar and theology point the same way it is usually wise to follow.

Why John Says Not to Pray About It

This is the part that troubles people most, and I think the explanation is simpler than it looks. John is not banning prayer. He is releasing his readers from an obligation.

There are moments in ministry when you become aware that God has decided something and that continuing to plead against it is not faith but resistance. David fasted and prayed while his child was ill, and the moment the child died he got up, washed and ate. Samuel was told to stop mourning over Saul. There is a point at which the believing response is submission rather than petition.

John is giving his readers permission to stop. If God has begun to act in the way described, the church is not obliged to keep asking him to reverse it. That is not hardness. It is trust.

How This Should Affect a Church

The immediate application John draws is intercession. His first instinct, when a believer sees a brother sinning, is that the believer should pray for him and God will give him life. That is a wonderfully positive instruction, and it is the main point of the passage. The sin unto death is the exception John mentions; praying for one another is the rule he commands.

I would love to see churches take that seriously. When you see a brother or sister going wrong, the reflex ought to be prayer rather than conversation about them with somebody else. John assumes a congregation in which people notice each other and carry each other to God.

There is a sobering side too. If God can take a believer home over persistent, unrepented sin, then sin among Christians is not a private matter with no consequences. Discipline in the church exists precisely so that things are dealt with before they reach that stage. I have written on this in church discipline and restoration.

Comfort at the End of It

Look at where John goes next. He says we know that everyone who has been born of God does not keep on sinning, but he who was born of God protects him, and the evil one does not touch him. That is the very next sentence after the sin unto death. John moves straight from the severest warning in his letter to the strongest statement of security in it.

So the passage that appears to threaten believers actually ends by guarding them. Even the sin unto death is administered by a Father, within the family, and it terminates in the presence of the Lord rather than away from him.

So, now what?

If you have been reading 1 John 5 with a knot in your stomach, let the shape of the passage reassure you. John wrote the whole letter so that believers might know they have eternal life, and he was not going to undo that purpose in two verses near the end.

The practical takeaway is not fear but intercession. Somebody came to your mind while you were reading this. Why not pray for them before you close the page?

If anyone sees his brother committing a sin not leading to death, he shall ask, and God will give him life.

1 John 5:16 (ESV)