How the Certainty of Salvation Becomes Confidence in Prayer

Main Idea of 1 John (The Central Thesis)

1 John is a pastoral letter written to give believers absolute assurance of their salvation and fellowship with God. It serves as a definitive guide to distinguish truth from error through the application of the “tests” of sound doctrine, righteous living, and sacrificial love—all rooted in the historical reality of Jesus Christ.

The Big Idea of This Passage (The Main Point)

Because believers can know with settled certainty that they possess eternal life in the Son, they may come before God in prayer with that same confidence—asking according to His will, and even interceding for a brother or sister caught in sin.

The Logical Bridge (The Contextual Link)

In 5:1–12, John has been building a case for certainty. He has shown that faith in Jesus as the Son of God is the mark of the new birth (5:1–5), and that this faith rests on solid testimony—the Spirit, the water, and the blood, all agreeing with God’s own witness about His Son (5:6–12). That entire argument reaches its hinge point in verse 13: John now tells us why he wrote it. He did not write so that his readers would wonder or hope; he wrote so they would know. And once that settled knowledge of eternal life is in place, John immediately shows where it leads—into a life of bold, confident prayer, including prayer for others who stumble in sin.

Questions for Reflection (Thought-Provoking Questions)

1. John says he has written “these things” so that his readers “may know” they have eternal life (v. 13). What is the difference between hoping you are saved and knowing you are saved—and where does that knowledge actually come from?

2. According to verses 14–15, what exactly is the “confidence” John describes in prayer? Is it a guarantee that God will give us whatever we ask for, or something else?

3. In verse 16, John assumes believers are close enough to one another to actually see a brother or sister sinning. What does that assume about how we are meant to live within the church, rather than alone?

4. Why do you think John distinguishes between sin that leads to death and sin that does not (vv. 16–17), and why might he decline to instruct us to pray about the first kind?

The Text

“I have written these things to you who believe in the name of the Son of God so that you may know that you have eternal life.

This is the confidence we have before him: If we ask anything according to his will, he hears us. And if we know that he hears whatever we ask, we know that we have what we have asked of him.

If anyone sees a fellow believer committing a sin that doesn’t lead to death, he should ask, and God will give life to him—to those who commit sin that doesn’t lead to death. There is sin that leads to death. I am not saying he should pray about that. All unrighteousness is sin, and there is sin that doesn’t lead to death.”

— 1 John 5:13–17 (CSB)

Observations (What the Text Says)

Verse 13: John states his purpose in writing directly: he has written “these things” to those who already believe in the name of the Son of God, so that they may move from believing to knowing—knowing, in the present, that they possess eternal life.

Verses 14–15: John names a specific “confidence” believers have before God: whenever they ask anything according to His will, He hears them. Because they know He hears them, they also know they already have what they have asked for.

Verse 16: John gives a concrete scenario—seeing a fellow believer commit a sin that does not lead to death. He instructs the observer to ask (pray), and God will give life to the sinning believer. John then notes there is a sin that leads to death, and states plainly that he is not instructing prayer for that case.

Verse 17: John closes with a general principle: all unrighteousness is sin (no wrongdoing is exempt from that category), yet he repeats that there is a category of sin that does not lead to death.

Interpretation: The Confidence of Knowing (Understanding the Meaning)

Written So You May Know (v. 13)

The phrase “these things” most naturally reaches back at least through the argument of 5:1–12, and very plausibly the whole letter. John is not writing to unbelievers to bring them to faith—that is the purpose he states for his Gospel (John 20:31). Here he writes to believers, and the goal is different: not first belief, but settled knowledge that flows from belief. This is an important distinction for a discouraged Christian to hear: doubting your salvation is not a sign of spiritual maturity, and John does not want you to stay there. He wrote an entire letter so that genuine believers could stop guessing and start knowing. Notice, too, that this knowledge is not self-generated confidence or a feeling worked up from within—it rests on the object named in the same verse: “the name of the Son of God.” Assurance in 1 John is never assurance in a vacuum; it is assurance anchored in a Person. Blake White, writing on 1 John from a New Covenant perspective, frames this kind of assurance as covenant assurance—the settled confidence that comes from actually being joined to God through the Son He has given, rather than from measuring up to some external standard.

The Confidence of Prayer (vv. 14–15)

The word translated “confidence” (sometimes rendered “boldness”) is the same word John has already used twice in this letter for believers standing unashamed before God (1 John 3:21–22; 4:17). John is not describing a new, separate confidence reserved only for prayer; he is showing that the same assurance that lets a believer know he has eternal life is the very thing that lets him approach God boldly in prayer. But notice the text carefully: this confidence is not a blank check. It is bound by a condition—“according to his will.” Prayer is powerful, not because it bends God to our preferences, but because it aligns us with what He has already purposed to do. That is why verse 15 can say we “know we have” what we asked for even before we see it—the confidence is settled the moment the request is truly aligned with God’s will, not only when the answer becomes visible.

Interceding for a Brother or Sister (v. 16)

John pictures one believer observing another—this assumes a real, watching, caring closeness within the church, not isolated individuals who never notice one another’s struggles. The command is simple: pray. And the promise is striking: God gives life to the sinning believer through that prayer. John does not fully define “sin that leads to death” here, and Bible teachers have long been cautious about being more specific than the text itself allows. Given how much of this letter has already dealt with those who left the fellowship and denied the truth about Christ (2:19; 4:1–3), the most natural reading—drawn from the letter’s own argument rather than imported from elsewhere—links “sin that leads to death” with that same settled, defiant rejection of Christ, not with the ordinary sins and stumbles of a genuine believer. Daniel Akin, in his commentary on these letters, likewise locates the background for this difficult phrase within John’s own concern about apostasy rather than in speculation drawn from outside the text. John’s restraint here is itself pastoral: he refuses to hand us a formula for diagnosing someone else’s eternal state.

The Boundary of Prayer (v. 17)

John will not let his readers treat sin lightly—“all unrighteousness is sin,” full stop, with no minor exceptions. But in the same breath he refuses to let a tender conscience spiral into despair, repeating that there is sin which does not lead to death. John Stott, in his commentary on these letters, has noted that the very existence of this distinction is meant to steady believers between two opposite errors: careless indifference to sin on one side, and paralyzing terror over every failure on the other. The text holds both truths together without resolving the tension into either extreme, and that balance is itself part of what John wants us to carry away.

Application (How We Respond)

1. Ground your assurance in Christ, not your feelings or your track record. In a culture that prizes personal, do-it-yourself spirituality disconnected from any real church family, it is easy to substitute private religious feelings for the settled knowledge John describes—knowledge anchored in the Son, not in your latest emotional high or low.

2. Let your prayers be shaped by what you know of God’s will, not just your wish list. Busyness, entertainment, and the pressure to be self-sufficient can crowd out real prayer altogether; this passage calls you to actually bring specific requests to God, trusting His will rather than treating prayer as a last resort when self-sufficiency runs out.

3. Take responsibility to notice and intercede for believers around you who are struggling with sin. Privatized faith that never gets close enough to see a brother or sister stumbling cannot obey this text; ask God to give you the kind of relationships—even across the distance of busy schedules or a scattered church family—where this kind of prayer becomes possible.

Be Intentional (Putting Truth into Action)

1. Intentional Assurance: This week, write down in one sentence why you know you have eternal life—rooted in the Son, not in a feeling or a good day—and share it with your group or a trusted believer.
2. Intentional Prayer: Choose one specific request you have been treating as a wish list item, and instead pray it according to what Scripture reveals of God’s will and character, even if that means changing how you ask.
3. Intentional Intercession: Identify one brother or sister in Christ you know is struggling right now, and commit to praying for them by name every day this week, even if life or distance keeps you from being physically near them.

Link to the Main Idea

This passage is not a detour from 1 John’s purpose—it states that purpose almost word for word. The letter exists to give believers absolute assurance of their salvation and fellowship with God, and verse 13 is John telling us so directly. But assurance in 1 John was never meant to end at personal comfort. It flows outward into confident prayer and into real care for other believers caught in sin—fellowship with God overflowing into fellowship with His people, exactly as the letter has argued from its opening chapter.

How Does This Text Point to Christ?

Every certainty in this passage is certainty in the Son. Verse 12, immediately before our text, has already said, “The one who has the Son has life.” Our confidence in prayer exists only because we come to the Father through a Son who has already secured our standing before Him. And when John tells us to pray for a brother caught in sin, he is asking us to participate, in a small way, in the very thing Christ himself does perfectly and continually—interceding for sinners before the Father (see 1 John 2:1–2, where Jesus is our advocate and the atoning sacrifice for our sins). The life given to the struggling believer in verse 16 is the same eternal life named in verse 13—life that is found nowhere else but in Christ, and secured for us at the cross.

Summary (Recapitulation)

Having built a case for assurance on the testimony of the Spirit, the water, and the blood, John now states his purpose plainly: he wants believers to know, not merely hope, that they have eternal life in the Son. That settled knowledge does not stay private; it produces bold, confident prayer shaped by God’s will, and it produces real care for other believers—even praying for a brother or sister caught in sin, trusting God to give life, while resting in the sober, steadying truth that not every sin carries the same weight before Him.

Ask Yourself (A Deep Heart Examination)

1. Do I rest in a settled knowledge of my salvation grounded in Christ, or do I let my assurance rise and fall with my feelings and performance?

2. When I pray, am I actually asking according to what I know of God’s revealed will and character, or am I only presenting Him with a wish list?

3. Am I close enough to the believers around me to notice when they are struggling with sin—and do I actually pray for them by name?

Bibliography (For Further Study)

Akin, Daniel L. 1, 2, 3 John. The New American Commentary, vol. 38. Nashville: B&H Publishing Group, 2001.

Akin, Daniel L. Exalting Jesus in 1, 2, 3 John. Christ-Centered Exposition Commentary. Nashville: B&H Publishing Group, 2014.

Stott, John R. W. The Letters of John: An Introduction and Commentary. Tyndale New Testament Commentaries. Rev. ed. Leicester: Inter-Varsity Press / Grand Rapids: Eerdmans, 1988.

White, A. Blake. Abide in Him: A Theological Interpretation of John’s First Letter. New Covenant Media, 2011.

Soli Deo Gloria