Apostle John’s Three Letters . . . 1 John 5:16–17

   Two Types of Sin

What do you do when you see a fellow believer caught in sin — look away, talk about it, or bring that person before God in prayer? Having assured us that God hears requests made according to his will, John now applies that confidence to a difficult situation: praying for any brother or sister who sins.

Alongside this encouragement comes a sobering distinction between sin that leads to death and sin that doesn’t. These challenging verses call us to take sin seriously without overlooking the loving response John places before us: prayer for one another.

These two verses also raise difficult questions. What does John mean by “sin that leads to death”? Is the death physical or spiritual? He doesn’t explicitly identify a particular offense or explain the distinction in detail, and interpreters have reached different conclusions. In examining the passage, we’ll consider explanations from several commentators, with links to their work where available.

One interpretation understands “sin leading to death” as a settled rejection of God’s Son and the life found in him, rather than an individual failure by a believer who turns back to God. Another understands it as sin for which God may discipline a believer with physical death. We’ll need to weigh these explanations in light of John’s teaching about sin, faith, and eternal life.

Verse 17 keeps an essential truth before us: “All wrongdoing is sin.” Whatever conclusion we reach about the difficult distinction, John gives us no permission to minimize wrongdoing. His words combine a serious warning about sin with an encouragement to pray for fellow believers.

Praying for a Brother Who Sins (1 John 5:16)

When another believer falls into sin, what should we do first? It’s easy to discuss the failure, question the person’s sincerity, or wonder how to respond. Apostle John intentionally directs us toward prayer — but his instruction includes a sobering distinction that calls for careful consideration:

To help us appreciate what Apostle John might have meant by this challenging verse, question #1 presents the interpretive proposals, while question #2 explains the life-and-death distinction and then closes with the practical responsibility to pray.

1. What Is “Sin That Leads to Death”?

When we see a brother or sister committing sin that doesn’t lead to death, John directs us to pray for that person. But his distinction raises difficult questions: What is “sin that leads to death,” and does “death” mean physical death or spiritual death? John doesn’t explicitly define the expression. His original readers may have understood the reference more readily than we do, but that remains an inference rather than something we can establish with certainty.

To explore these questions, we’ll consider several interpretations and the reasons commentators give for them, while keeping John’s encouragement to pray firmly in view. Steven J. Cole summarizes four major interpretations, which provide a starting point for considering the explanations that follow.

1. A particular grave sin that God will not forgive.

2. Blasphemy against the Holy Spirit.

3. Apostasy — a decisive abandonment of the Christian faith.

4. Sin for which God brings physical death upon a believer.

Apostasy: A Deliberate Rejection of Christ

Some commentators understand “sin leading to death” as a deliberate rejection of Christ and his claims. Alan E. Brooke connects the expression with such rejection, an interpretation that finds support in John’s description of people who left the Christian fellowship and denied the Son (1 John 2:18–23). According to this interpretation, John’s concern isn’t simply an individual moral failure, but a deliberate rejection of Jesus Christ, the one in whom eternal life is found.

This interpretation raises a further question: Does “brother” refer to a genuine believer or to someone whose profession of faith proves false? Interpreters answer differently, and their understanding of this term affects how they explain both the sin and the promised gift of life.

What Does “Death” Mean?

The meaning of “death” is equally important. Albert Barnes explains here that the expression describes sin tending toward death or resulting in death. But the phrase alone doesn’t settle whether John means bodily death, spiritual death, or final judgment. Those possibilities must be weighed in light of the passage and John’s wider teaching.

Those who favor physical death point to passages where sin brings fatal judgment, such as 1 Corinthians 11:30. Those who favor spiritual death emphasize that the surrounding verses speak of eternal life in God’s Son (1 John 5:11–13, 20). Each interpretation must explain how “life” and “death” function together in v. 16.

Blasphemy Against the Holy Spirit

Another interpretation connects John’s words with Jesus’ warning about blasphemy against the Holy Spirit (Matthew 12:31–32). John Stott associates “sin leading to death” with a hardened, deliberate rejection of known truth. This reading also draws attention to the Spirit’s testimony about Jesus earlier in the chapter (1 John 5:6–10).

Irvin A. Busenitz, however, identifies difficulties with directly equating the two passages. John doesn’t explicitly refer to Jesus’ warning in Matthew 12, and someone openly rejecting the Spirit’s work would be difficult to recognize as a “brother” within the fellowship. These are objections to consider, not a final resolution of the question.

The uncertainty should make us cautious about pronouncing another person beyond God’s mercy. Even Busenitz, who argues that persistent sin can culminate in an irreversible spiritual condition, warns against judging another person’s standing too quickly and encourages prayer unless God reveals otherwise. Our discussion must preserve John’s clear encouragement to pray without pretending that every difficulty has been resolved.

How Commentators Understand “Sin Leading to Death”

• Alan England Brooke understands “sin leading to death” as a deliberate rejection of Christ and his claims. As Irvin A. Busenitz explains in his survey of interpretations, Brooke doesn’t limit the expression to one particular offense; rather, any sin involving a deliberate rejection of Christ’s claims may be described as leading to death. This reading connects naturally with John’s account of those who left the Christian fellowship and denied the Son (1 John 2:18–23).

• John Stott connects “sin leading to death” with the deliberate rejection of known truth associated with blasphemy against the Holy Spirit (Matthew 12:31–32). As quoted by Busenitz, Stott describes such a person in the language of John’s gospel: He has loved darkness rather than light and will die in his sins (John 3:18–21; John 8:24). This interpretation emphasizes rejection of the Spirit’s testimony about Jesus rather than an isolated moral failure.

• Irvin A. Busenitz regards that explanation as possible but raises two objections: John doesn’t explicitly connect this passage with the warning in Matthew 12, and someone openly rejecting the Spirit’s work would be difficult to recognize as a “brother” within the fellowship. Busenitz instead argues that John has in view a professing Christian whose persistent practice of sin reveals that he hasn’t actually received spiritual life. He understands the promised “life” as salvation and the corresponding “death” as spiritual rather than physical. In his interpretation, persistent sin may culminate in an irreversible condition in which repentance and forgiveness are no longer possible.

Despite the severity of his conclusion, Busenitz cautions against deciding too quickly that another person has reached such a condition. He urges believers to continue praying unless God reveals otherwise, remembering God’s power to save even those who seem deeply hardened. His pastoral caution is important: The passage should make us serious about sin without making us hasty judges of another person’s final standing before God.

2. What Kind of Death Does John Mean?

What kind of “death” does John mean? Two major interpretations understand it as either physical death under God’s discipline or spiritual death associated with persistent rejection of God’s life. How we understand “death” also affects how we interpret the corresponding promise: “God will give them life.”

Physical Death under God’s Discipline

Some commentators understand John to mean that a believer’s sin may result in physical death. Adam Clarke and Lewis Sperry Chafer, as quoted by Busenitz, support this interpretation; David Guzik likewise emphasizes that John initially speaks of a “brother.” A principal supporting passage is 1 Corinthians 11:27–32, where Paul connects some deaths among the Corinthians with their conduct at the Lord’s Supper. Paul describes this judgment as discipline, distinguishing it from condemnation with the world. [Enlarge painting; find more materpieces here.]

On this reading, “God will give them life” concerns the preservation or restoration of physical life. However, the existence of fatal discipline elsewhere in Scripture doesn’t establish that John means the same thing here. Nor should this interpretation lead us to assume that a believer’s illness or untimely death is punishment for a particular sin. Guzik himself cautions against making that judgment.

Spiritual Death and the Rejection of God’s Son

Other commentators understand “death” spiritually. Busenitz emphasizes that John elsewhere speaks of passing “from death to life” (1 John 3:14), while the surrounding verses locate eternal life in God’s Son (5:11–13, 20). He argues that this context favors spiritual life and death rather than a change to physical life and death in v. 16. On his interpretation, the person receiving life is someone who professes faith but still needs salvation.

This raises the question of whom John calls a “brother.” Advocates of the physical-death interpretation understand the term as identifying a genuine believer. Busenitz argues that it can include someone accepted within the fellowship whose profession of faith isn’t genuine. The disagreement therefore concerns not only the meaning of “death,” but also the spiritual condition of the person for whom prayer is offered.

“God Will Give Them Life”

John’s promise gives intercession a serious and hopeful purpose. We aren’t merely observing another person’s sin; we’re bringing that person’s need before God. Whether “life” is understood as physical preservation or the gift of spiritual life, God is the giver. But we shouldn’t turn this qualified promise into a guarantee that every person for whom we pray will necessarily recover physically or receive eternal life. John expressly limits his assurance to sin that doesn’t lead to death.

Beyond the issues of the types of sins and death to which Elder John refers, it’s comforting to know that God hears and responds, as he deems appropriate, to all the prayers we make on behalf of a brother or sister in sin. Perhaps such prayers have special power before God because they’re prayers prayed in fulfillment of God’s command to love our brethren — a command we must follow! We certainly love others best when we pray for each other, knowing that “God will give them life.”

“I Am Not Saying That You Should Pray About That”

John’s closing qualification requires care. He doesn’t extend the preceding assurance to sin that leads to death, but his wording isn’t a direct command, “You must not pray.” Guzik understands the statement as recognizing a point at which fatal discipline must be left in God’s hands. Busenitz, approaching the passage differently, cautions against deciding too quickly that someone is beyond the reach of saving grace and encourages continued prayer unless God reveals otherwise.

We may not resolve every difficulty in these verses, but uncertainty shouldn’t make us careless about sin or indifferent toward a fellow believer. John directs us toward prayer, while reminding us that its outcome rests with God. Our response should combine earnest intercession, humility about what we don’t know, and confidence in God’s wisdom.

Sin That Doesn’t Lead to Death (v. 17)

If some sin doesn’t lead to death, does that make it harmless? John won’t let us draw that conclusion. His next words hold together two truths we mustn’t separate: All wrongdoing is sin, yet there is sin that doesn’t lead to death.

John’s distinction mustn’t become an excuse to treat any wrongdoing as unimportant or harmless: “All wrongdoing is sin.” Nevertheless, he repeats that there’s sin that doesn’t lead to death. Whatever interpretation we adopt concerning “death,” both statements must remain together: Sin is serious, and John’s encouragement to pray for a sinning brother or sister remains meaningful.

John doesn’t supply a list of offenses for each category, so we should resist constructing one ourselves. His wider teaching directs believers who sin toward confession and reliance on Jesus, our advocate — not toward denial or despair (1 John 1:9–2:2). Here, he directs fellow believers toward intercession rather than indifference.

Matthew Henry offers a helpful pastoral application. We shouldn’t ask God to approve someone’s continued unbelief or refusal to repent; instead, we can pray for that person’s repentance, faith, forgiveness, and restoration. As Henry concludes, “Let us be truly thankful that no sin, of which any one truly repents, is unto death.” This is Henry’s interpretation of the passage, but it usefully directs our concern toward seeking another person’s return to God.

Concluding Considerations of vv. 16 and 17

John’s teaching about prayer in vv. 14–15 (reviewed in our previous commentary) leads directly to this particular responsibility: praying for a brother or sister who sins. The promise that God will give life makes such intercession a serious and hopeful act. Yet John qualifies that promise, and the questions surrounding “sin leading to death” should keep us humble about declaring another person’s final condition.

We may not resolve every difficulty, but we needn’t overlook the response John clearly encourages. Take wrongdoing seriously, bring the person’s need before God, and pray for repentance and restoration. Rather than allowing uncertainty to silence our prayers, let it deepen our dependence on God’s wisdom and mercy. Henry’s counsel is fitting: We should seek God’s pardon and recovery of the fallen, as well as his help for the tempted and afflicted.

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