First John 5:13 tells believers that the letter was written so they could know, with confidence, that they have eternal life in the Son of God. It also encourages them to keep trusting Jesus rather than drifting away. The author is traditionally identified as the apostle John, writing to a community of Christians who already trust in Jesus and need reassurance about where they stand with God.
These things I have written to you who believe in the name of the Son of God, that you may know that you have eternal life, and that you may continue to believe in the name of the Son of God.
1 John 5:13 (WEB)
What 1 John 5:13 Means
The verse begins with “these things I have written,” which points back to the whole letter. John is saying that his purpose in writing is practical: he wants his readers to be sure of something. The key word is “know.” John is not hoping they will feel reasonably hopeful. He wants them to be settled in the truth that eternal life belongs to those who trust the Son of God.
The verse then names two aims. The first is assurance: that you may know you have eternal life. The second is steadiness: that you may continue to believe. Notice that the second goal is not in tension with the first. Assurance does not make faith unnecessary. Rather, a settled confidence in God’s promise is what keeps a believer holding on.
What the verse does not promise is a life without struggle or a feeling of certainty at every moment. It speaks of a settled truth grounded in what God has testified about his Son, not in how strong your emotions happen to be on a given day.
The Context of 1 John 5:13
The verse sits in a passage about testimony. In verses 10 through 12, John explains that God has given eternal life to us and that this life is found in his Son. Anyone who has the Son has the life, and anyone without the Son does not. So when John writes “these things,” he means that the whole argument about the Son and the life he gives is being set down so his readers can rest on it.
Read this way, the verse is less about a private feeling and more about a public, objective truth. Assurance, in John’s framework, comes from believing God’s testimony about his Son. That is why the verse can speak with such confidence: the basis of the believer’s certainty is the Son himself, not the believer’s own record of performance.
Key Phrases in 1 John 5:13
John 20:31
But these are written, that you may believe that Jesus is the Christ, the Son of God, and that believing you may have life in his name.
(WEB)
John states a similar purpose at the close of his Gospel, writing so that his readers may believe that Jesus is the Christ, the Son of God, and that through believing they may have life in his name. The parallel shows that John’s whole body of writing aims at the same goal of confident, life-giving faith in Jesus.
1 John 5:11
The testimony is this, that God gave to us eternal life, and this life is in his Son.
(WEB)
This verse, just before the one under study, names the testimony itself: God gave us eternal life, and this life is in his Son. Reading it alongside 1 John 5:13 shows that the assurance John wants us to have rests on what God has said, not on what we manage to produce.
A Short Prayer From 1 John 5:13
Father, thank you that you have not left us guessing about eternal life. You have shown it in your Son, Jesus, and you have written this truth down so that we might know it. Where I feel unsure, help me come back to what you have said rather than to my own shifting feelings. Give me steady trust in the name of your Son, and help me keep believing one day at a time. Amen.
