1 John 5:6-21: The Sin that Leads to Death
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1 John 5:6-21: The Sin that Leads to Death

About This Episode

John ends his first letter to a community struggling with the lies of several antichrists. It's his final case about the certainty of Jesus's identity to a community unsure of it. Seth and David talk about how to pray, what it means to be confident, and what the "sin that leads to death" is.

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The Three Witnesses, the Sin That Leads to Death, and What Eternal Life Really Means: 1 John 5:6–21

Show Notes

David and Seth, hosts of the Spoken Gospel podcast, wrap up their series on 1 John by diving into one of the letter's most debated and theologically rich sections. Recording from deep within a COVID quarantine, they unpack the testimony of the water and the blood, redefine what eternal life actually means, explore the surprising connection between prayer and God's indwelling presence, and tackle the infamous "sin that leads to death."

Jesus Came by Water and by Blood

In 1 John 5:6, John writes that Jesus "came by water and blood—not by the water only, but by the water and the blood." This language points to Jesus' two baptisms: the baptism by water at the Jordan River, where God spoke from heaven and the Holy Spirit descended, and the baptism by blood at the cross. Jesus himself referred to his crucifixion as a baptism of blood in Mark 10:38, using the word "baptism" three times to describe his death.

The reason John doubles down on both water and blood is that the false teachers—the antichrists he has been warning about throughout the letter—were apparently willing to accept that Jesus was confirmed as the Messiah at his baptism, but not that the Messiah could suffer and die. A heresy circulating in this period taught that "the Christ," a divine being from heaven, inhabited the human Jesus at his water baptism but departed before the cross, never enduring death. For these false teachers, God was too transcendent to bleed. They could accept a divine voice from heaven and a dove landing on a man, but the idea of God being bloodied was offensive—too much flesh in the divine.

John's rebuttal is that the good news itself depends on both events. God became flesh, was born, was confirmed as the Messiah at his baptism, and remained the Messiah all the way through his death. He came through water and through blood. To strip away the blood is to strip away the atonement that John has already described earlier in his letter. It is not merely important for the Gospel—it is the Gospel. There is also an echo of the Exodus narrative here, where blood, water, and Spirit functioned as the three signs of God's salvation of Israel: the Nile turned to blood, the waters were parted, and the Spirit guided Israel through the wilderness. Those same three witnesses now testify to the salvation that has come in Jesus.

A Court Case with Three Witnesses

John structures his argument like a legal proceeding. Under Old Testament law, no one could be convicted or vindicated without two or three witnesses (Deuteronomy 19:15). John presents two witnesses first—the water and the blood—and then introduces a third: the Holy Spirit. "There are three that testify: the Spirit and the water and the blood; and these three agree" (1 John 5:7–8). All three point to the same reality: Jesus is the Son of God who came in the flesh and died to give eternal life.

John then raises the stakes. If human testimony is accepted in court when two or three witnesses agree, how much greater is the testimony of God himself? To reject this testimony is not simply to disagree with an interpretation—it is to call God a liar (1 John 5:10). Anyone who denies that Jesus is the Messiah who came in the flesh and died as an atoning sacrifice is, in John's vocabulary, an antichrist. That term is not thrown around casually. Throughout the letter, John has defined an antichrist as anyone who denies the identity and work of Jesus: that he is the anointed one, that he came in the flesh, that he died on the cross as the Son of God. The court case is airtight. The witnesses are God the Father who spoke at the baptism, the Holy Spirit who descended, and the blood of the cross and the empty tomb. There are no more qualified witnesses.

Eternal Life Is Not Just Living Forever

The testimony God gives is not merely that Jesus is divine. It is that "God gave us eternal life, and this life is in his Son. Whoever has the Son has life; whoever does not have the Son of God does not have life" (1 John 5:11–12). This language reshapes what eternal life means. The common assumption is that eternal life refers to an extended lifespan—living forever in a place where Jesus happens to be. But John defines eternal life as something far more relational and intimate. Eternal life is not a thing you receive alongside Jesus; it is Jesus. To have the Son is to have life. To lack the Son is to lack life entirely.

This reframing changes how the antichrists' rejection should be understood. They are not merely declining the offer of an indefinite lifespan. They are rejecting the very person in whom life exists. And it changes how those who trust Jesus should think about their own assurance. The crisis of faith John's readers were experiencing—"Am I really with God? Am I in him or not?"—is not solved by the abstract promise of living forever. It is solved by the promise of being with Jesus. John writes, "I write these things to you who believe in the name of the Son of God, that you may know that you have eternal life" (1 John 5:13). The entire letter has been building to this: the assurance that those who trust Jesus are in him, and that being in him is itself eternal life.

This connects back to the beginning of 1 John, where John identified life itself as Jesus—the eternal life that was with the Father and was made manifest (1 John 1:2). Light and life are connected terms throughout the letter. "Eternal light" evokes something different than "eternal life" typically does. It suggests the quality and brilliance of existence with God, not merely its duration. John has done the interlocking work throughout his letter so that his readers can meditate on what it means to be with Jesus forever—not just to exist forever in a location where Jesus resides.

Prayer as Free Speech Before God

From the assurance of eternal life, John moves unexpectedly to prayer. "This is the confidence that we have toward him, that if we ask anything according to his will, he hears us" (1 John 5:14). The word translated "confidence" is the Greek word parrhesia, which literally means free speech. Prayer, in John's vision, is an exercise in speaking freely before God—without the self-editing, caveats, and fear that characterize even our closest human relationships.

The condition John attaches is that prayer be offered "according to his will." This does not refer to trying to decode God's secret timeline—what job to take, what socks to wear, which side of a war to root for. John is talking about the revealed will of God, the promises and commands that Scripture makes plain. Everything John has said in this letter about obeying God's commands, believing in the Son, and loving one another constitutes God's revealed will. To pray according to that will is to align oneself with what God has already declared he desires.

As the theologian John Stott wrote, "Prayer is not a convenient device for imposing our will upon God or for bending his will to ours, but it is the prescribed way of subordinating our will to his." Every true prayer, Stott argued, is a variation on the theme "Your will be done"—the petition Jesus taught in the Lord's Prayer and then demonstrated supremely in Gethsemane. This reframes the entire exercise of prayer: God is in us, wanting to manifest his will, his love, and his holiness in our lives, and prayer is how we say, "Yes, help me get out of the way." The reason we can be confident that such prayers are answered is that the God who hears prayer is not distant. He dwells in us. There is no gap between the prayer offered according to God's will and the God who fulfills it, because the one who prays and the one who answers share an intimate, indwelling union.

The Sin That Leads to Death and Praying for a Sinning Brother

John then applies this theology of prayer to a concrete situation in the life of his church. "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). After the antichrists were exposed and expelled, the remaining church members were left wondering what to do about ordinary sin among genuine followers of Jesus. Do you treat a sinning brother the same way you treated the antichrists? Do you kick them out too?

John's answer is prayer. When you see a fellow believer sinning, your first response should not be judgment or condemnation but intercession. The Greek of verse 16 is intentionally ambiguous about who gives life—"he shall ask, and he will give him life." It could refer to God, but the sentence structure also allows it to refer to the one praying. This is not because a human can give life on their own, but because God lives in the one who prays. When you intercede for your brother, you are acting as an advocate—mirroring what Jesus does as our advocate with the Father (1 John 2:1). You are being Jesus to that person. And this should, in turn, bolster your own assurance that you are in Jesus, because you are acting like him.

The "sin that leads to death," by contrast, is not any particular moral failure. It is the defining sin of the antichrists throughout the letter: the denial that Jesus is the Son of God who came in the flesh and died for our rebellion. John says not to pray "for that" (1 John 5:16)—not because God does not desire all people to be saved, but because it is impossible for eternal life to exist apart from Jesus. Life and Jesus are synonymous. To pray that God would grant eternal life to someone who actively rejects Jesus is to pray for a logical and theological impossibility. You can and should pray that such a person would come to know Jesus, because in him is the only source of life. But you cannot pray that life be granted outside of him, because that would be to deny the very thing John has been arguing throughout the entire letter. The temptation, both then and now, is to separate the good things of God from being with God—to want light without the source of light, love without the author of love, life without the giver of life.

Three Things We Know and the Final Command

John closes his letter with three confident "we know" statements that summarize the major themes he has been developing. First, "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 harm him" (1 John 5:18). Those who are in Jesus will progressively conquer sin, and Jesus himself stands as their protector against the forces of darkness. The lust of the flesh, the lust of the eyes, and the pride of life will not ultimately overcome those who trust Jesus. Second, "We know that we are from God, and the whole world lies in the power of the evil one" (1 John 5:19). There are two kingdoms, and those who trust Jesus live as children of God in occupied territory. Third, "We know that the Son of God has come and has given us understanding, so that we may know him who is true; and we are in him who is true, in his Son Jesus Christ. He is the true God and eternal life" (1 John 5:20). This is John's strongest declaration of Jesus' divinity in the entire letter.

Then comes the final line: "Little children, keep yourselves from idols" (1 John 5:21). It seems abrupt, but it is the only way this letter could end. From the very first verse, John has been insisting that life, light, love, confidence, and truth are all found in one place and one person: Jesus. Any other path to those realities is a false god. The command echoes the first and second of the Ten Commandments—have no other gods, make no idols—and it reappropriates them for the new covenant community. Jesus is the true God. Jesus is eternal life. To accept any substitute, any other version of how life or salvation works apart from him, is idolatry. For a church under pressure from false teachers who may have been a form of Judaizers—people who once considered Jesus the Messiah but turned away—the irony is sharp. They rejected Jesus because they thought a visible God was an idol. John says the opposite: any image of God other than Jesus is the real idol.

Transcript

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