1 John

Book of 1 John

 

WHEN YOU NEED ASSURANCE

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The Gospels show you who Jesus is. Acts shows you what His Spirit started doing. Romans shows you how a person is made right with God. 1 Corinthians shows you how to live together as the church. 2 Corinthians shows you how to keep walking when it gets hard. Galatians shows you that you are free. Ephesians shows you who you are now. Philippians shows you how joy can be real even when life is not. Colossians shows you that Jesus is enough. 1 and 2 Thessalonians show you how to live with hope between Jesus' first coming and His return. 1 and 2 Timothy show you how the church is meant to live and how to finish well. Titus shows you what happens to people when the gospel is actually doing its work in them. Philemon shows you what the gospel looks like when it walks into one specific, costly relationship. Hebrews shows you that Jesus is better than everything you might be tempted to go back to. James shows you what living faith actually looks like in practice.

 

1 John shows you how to know that your faith is real, and how to know that the Jesus you have encountered is the actual Jesus.

 

It is a short letter from an old man. John, the last of the original twelve, writing in his later years to believers he loved like his own children. He wrote it because there were already voices in the early church telling people things about Jesus that were quietly not true. Voices that sounded spiritual. Voices that sounded confident. Voices that were leading people away from the Jesus John had known with his own eyes and his own hands.

 

The question many new believers carry quietly is one this letter answers more directly than any other in the Bible. How do I know that my faith is real, and how do I know that the Jesus I have encountered is the actual Jesus and not a version of Him that sounds convincing but is quietly something else?

 

John's answer takes five short chapters. He gives you a way to know. He does not give you a feeling to chase. He gives you tests you can check your life against, and an assurance you can rest in. He wants you to know. He says so plainly near the end. He wrote this whole letter so that you may know that you have eternal life.

 

This guide will not replace your Bible. It is here to walk alongside you while you read it. Open 1 John soon. It is so short you can read it in twenty minutes. Let what is said here send you back to the source.

 

Who Wrote It 

John. The same John who wrote the Gospel of John and the book of Revelation. He was one of the original twelve disciples, one of the inner three (Peter, James and John) who saw Jesus transfigured on the mountain, who were closest to Him in Gethsemane, who were closest to Him in the upper room. He was the disciple Jesus loved (John 13:23). He was the one Jesus, from the cross, asked to take care of His mother Mary (John 19:26-27).

 

By the time 1 John was written, probably in the late AD 80s or early 90s, John was an old man, likely living in Ephesus. The other original apostles were almost all dead. Peter and Paul had been killed in Rome decades earlier. John was the last surviving eyewitness of Jesus. The last one who could say, I was there. I heard Him. I saw Him. I touched Him.

 

That is exactly how he opens the letter.

 

What was from the beginning, what we have heard, what we have seen with our eyes, what we have looked at and touched with our hands, concerning the Word of Life and the life was revealed, and we have seen and testify and proclaim to you the eternal life, which was with the Father and was revealed to us what we have seen and heard we proclaim to you also, so that you too may have fellowship with us; and indeed our fellowship is with the Father, and with His Son Jesus Christ.

1 John 1:1-3

 

Sit with these lines. John is making the strongest possible claim about who Jesus is and how he knows it. The Word of Life. Eternal life. The One who was with the Father from the beginning. And the man writing this is not speculating. He saw Him. He heard Him. He touched Him. He is writing as an eyewitness.

 

That matters more than almost anything else about this letter. The Jesus John is telling you about is not a Jesus he imagined or theorised. It is the Jesus he spent three years with. The Jesus he leaned against at the last supper. The Jesus he watched die. The Jesus he saw alive again with his own eyes three days later. That is the Jesus John is asking you to trust.

 

Who He Was Writing For 

John writes to believers he knows well. He calls them his little children more than ten times in the letter. It is the tone of an old pastor writing to a congregation he has loved for decades.

 

They were facing a particular problem. False teachers had been in the church and had recently left it (1 John 2:19). These teachers had taught a version of Christianity that John did not recognise. They claimed special knowledge and deeper spirituality. And they taught things about Jesus that were quietly wrong. Some denied that Jesus had really come in the flesh (1 John 4:2-3). Some denied that He was truly the Christ (1 John 2:22). Some lived as though sin did not matter (1 John 1:8 and 10). Some did not love the other believers (1 John 4:20).

 

The believers who remained were shaken. If those teachers had been so confident, and had now walked out the door, how could anyone be sure their own faith was real? How could they know who was telling the truth about Jesus and who was not?

 

John writes the whole letter to settle exactly that question. You can know. Here is how.

 

If you have ever been told, by someone who sounded very spiritual, that there is a deeper, hidden, or special version of Jesus that ordinary believers have not yet found, 1 John is for you.

 

The Tone of the Letter

1 John is gentle and pastoral, but underneath the gentleness it is one of the most decisive letters in the New Testament. John does not argue the way Paul does. He does not build a case step by step. He simply states what is true and what is not, in plain, repeated, almost circular sentences. Light and darkness. Truth and lies. Love and hatred. Life and death. He keeps coming back to the same few contrasts because he wants them to settle deep.

 

The Greek is some of the simplest in the New Testament. Short words. Short sentences. The kind of writing an old teacher uses when he wants the youngest believer in the room to follow every word.

 

And running through every paragraph is one quiet refrain. I am writing this so that you may know. So that you may know your sins are forgiven. So that you may know you have eternal life. So that you may know the love of God. John wants you to know. He is not writing to make you anxious. He is writing to make you sure.

 

Who Jesus Is in This Letter

John says some of the highest things about Jesus anywhere in the New Testament, and he says them with the quiet certainty of someone who knew Him personally.

 

He calls Jesus the Word of Life (1 John 1:1). The same title he gives Him in the opening of his Gospel, where he writes that the Word was with God and the Word was God (John 1:1). The Jesus John knew is not a great teacher. Not a wise man. Not a spiritual guide. He is the eternal Word of God, who was with the Father from the beginning, who came into a human body, and lived among us.

 

He calls Jesus the propitiation for our sins (John 2:2 and 1 John 4:10). The Greek word is hilasmos. It means the sacrifice that turns aside wrath and makes peace. In the Old Testament, on the day of atonement, the high priest sprinkled blood on the mercy seat to cover the sin of the people for another year. John says Jesus is that, finally and forever, for the whole world. He is the sacrifice that opened the way.

 

He calls Jesus our advocate with the Father (1 John 2:1). The Greek word is parakletos. The same word Jesus used in the upper room when He promised the Holy Spirit as another parakletos (John 14:16). It means one called alongside to help, to defend, to plead the case. When you sin as a believer, John says, you have an advocate. Jesus Himself stands beside you before the Father. He is not your accuser. He is your defender.

 

He calls Jesus the Son of God repeatedly. Not a son. The Son. The unique and only Son of the Father (1 John 4:9). The one through whom we have life (1 John 5:11-12). And in the most quietly extraordinary line of the whole letter, he tells you what Jesus is.

 

And 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. This is the true God and eternal life.

1 John 5:20

 

Take this in. This is the true God and eternal life. John has just been speaking about Jesus Christ, and he says of Him, this is the true God. The Jesus John is telling you about is God in human form. The Son truly came in the flesh. The Son truly died for sin. The Son is truly alive at the right hand of the Father, our advocate, right now.

 

If you have encountered Jesus and are wondering whether what you encountered was really God, 1 John gives you the answer. Yes. The Jesus John walked with is the true God. The Jesus you met is the same Jesus.

 

How to Know Your Faith Is Real

This is the heart of the letter, and the reason it has been treasured for two thousand years. John gives you three tests. Three honest, repeatable, biblical ways of checking whether the life you now have is really the life of God in you.

 

These are not entry requirements. You do not pass them to become a Christian. They are signs of life. The way a heartbeat is a sign of life. You do not pump your own heart. The heart beats because there is life inside. John says, here are the signs that the life is really there.

 

The Truth Test

The first test is what you believe about Jesus. Real faith holds the truth about who Jesus actually is. The Jesus who is fully God and fully man. The Jesus who came in the flesh. The Jesus who died as the sacrifice for sin. The Jesus who rose. The Jesus who is at the right hand of the Father now.

 

John says it directly. Whoever confesses that Jesus is the Son of God, God abides in him, and he in God (1 John 4:15). And on the other side, every spirit that does not confess Jesus is not from God (1 John 4:3).

 

If a teaching about Jesus quietly subtracts from who He actually is, that teaching is not from God, however spiritual it sounds. If a teaching denies that He is truly God, or truly man, or that He really died, or that He really rose, it is not the gospel. John lived through the first wave of these voices. He warned you so that you would recognise the next wave when it came.

 

The Love Test

The second test is how you treat other believers. Real faith produces love. Not a feeling. A willingness to lay down your life, your comforts, your time, your pride, for the brothers and sisters God has put around you. John is not talking about vague spiritual affection. He means practical love. Forgiveness. Patience. Generosity. Staying present for people when it costs you something.

 

John keeps coming back to this. We know that we have passed out of death into life, because we love the brethren (1 John 3:14). If anyone says, I love God, and hates his brother, he is a liar (1 John 4:20). You cannot love a God you cannot see if you cannot love the brother you can see.

 

This is not a test of perfect love. It is a test of direction. The Spirit of God in you is moving you, slowly and steadily, toward love for the people He has put around you. If you find yourself softening toward people you used to write off, forgiving people you used to resent, willing to absorb cost for someone else, that is the life of God in you. That is the love test passing.

 

The Righteousness Test

The third test is the direction of your life. Real faith does not leave you living the way you used to live. John says, no one who abides in Him sins; no one who sins has seen Him or knows Him (1 John 3:6). This does not mean a believer never sins. John has already written that if we say we have no sin, we deceive ourselves (1 John 1:8). What it means is that a believer does not go on living in unrepentant sin as a pattern of life.

 

Real faith breaks the pattern. The same sin that used to feel normal now troubles you. The same compromise that used to feel fine now bothers your conscience. You fall, but you do not stay down. You confess, you get up, you walk on. That movement is the life of God in you. Whoever has been born of God does not go on sinning, John says, because the seed of God abides in him (1 John 3:9). The seed is alive. It is doing what seeds do. It is growing into something the old life could not produce.

 

If you check your life against all three of these tests and find that, in your weakness and inconsistency and slow progress, you still hold the truth about Jesus, you still find yourself loving His people, and your life is gradually moving in a different direction than it once was, then John says you can know. The life is real. The faith is real. The Jesus you encountered is the actual Jesus.

 

Two Words Worth Knowing

In the opening verses, John says he is writing so that you may have fellowship with him, and with the Father and the Son (1 John 1:3). The Greek word for fellowship is koinōnia. It means shared life. Not information about God. Shared life with God. You are in. You are family. That is what Jesus died to give you.

 

The second word runs through the whole letter. Menō. It appears more than twenty times in five short chapters, usually translated abide, remain, or stay. It is the same word Jesus used in the upper room when He told the disciples to abide in Him as a branch abides in the vine (John 15:4). John keeps using it. Abide in Him. Let what you heard from the beginning abide in you. Whoever confesses that Jesus is the Son of God, God abides in him, and he in God. The one who abides in love abides in God, and God abides in him (1 John 2:24, 4:15, 4:16).

 

The picture is not of you straining toward God from a distance. It is of you living in Him and Him living in you. Shared dwelling. Mutual home.

 

John's picture of spiritual life is surprisingly steady. Abiding is not frantic striving. It is staying. Staying near Jesus when you feel strong and when you do not. Staying in His word. Staying in fellowship. Staying when emotions rise and when they flatten out. If you came to Jesus through a powerful encounter, hear this carefully. The intensity of the encounter is not the measure of your faith. The abiding is. Real spiritual life is often quieter and steadier than people expect.

 

Two Sentences That Hold the Whole Letter

John gives you two short sentences about God that anchor everything else in the letter. He repeats them and builds the whole letter around them.

 

The first is in chapter 1. God is Light, and in Him there is no darkness at all (1 John 1:5). The second is in chapter 4. God is love (1 John 4:8 and 16).

 

These are not contradictions. They are the two sides of who He is.

 

God is light. That is His holiness, His truth, His goodness, His purity. He cannot do wrong. He cannot lie. He cannot stand sin. If you want to know the will of God, walk in the light. Walk in honesty. Walk in truth. Walk in the kind of life that does not have to hide what it is doing.

 

Walking in the light does not mean living perfectly. It means living honestly before God. The people closest to Him are not the people pretending they never struggle. They are the people who keep bringing everything into the light instead of hiding. If we say that we have no sin, we are deceiving ourselves and the truth is not in us. If we confess our sins, He is faithful and righteous, so that He will forgive us our sins and cleanse us from all unrighteousness (1 John 1:8-9). Confession is not the interruption of relationship with God. In 1 John, it is part of the relationship itself.

 

God is love. That is His heart, His character, His motive in everything He has ever done. The cross is not God overcoming His own reluctance to love you. The cross is the deepest expression of who He has always been. In this is love, not that we loved God, but that He loved us and sent His Son to be the propitiation for our sins (1 John 4:9-10).

 

Let this land. The love did not start with you. It started with Him. He loved you before you ever turned toward Him. The encounter you had with Him was His initiative, not yours. He has been the one moving toward you all along.

 

There is no fear in love, but perfect love drives out fear, because fear involves punishment, and the one who fears is not perfected in love.

1 John 4:18

 

If your faith has been laced with fear, hear this verse slowly. Real love and fear cannot coexist forever. The love is meant to drive the fear out. The more you know how He loves you, the less the fear has room to stay. The Father loves you. The Son died for you. The Spirit lives in you. That is the love that drives the fear out.

 

The Verse John Wrote the Whole Letter For

Near the end of the letter, John tells you exactly why he wrote it.

 

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

1 John 5:13

 

So that you may know. Not so that you may hope. Not so that you may think. So that you may know.

 

John does not want your faith to live on a wave of feeling. He wants it to live on certainty about what is true. The Son of God came. He died for your sins. He rose. You believed in Him. You have eternal life. He wants you to know that, on the days you feel close to Him and on the days you do not.

 

A Few Threads from the Old Testament

John does not quote the Old Testament directly the way Paul does, but the whole letter is soaked in its language.

 

The light and darkness language goes back to the very first chapter of Genesis, where God separated light from darkness (Genesis 1:3-4). The Psalmist says the Lord is my light and my salvation (Psalm 27:1). Isaiah says the people walking in darkness have seen a great light (Isaiah 9:2). John says, in Jesus, that light has come into the world, and the life He gives is a life walked in the light.

 

The sacrifice language goes back to Leviticus. The whole Old Testament sacrificial system was a long picture of what was finally going to happen. Sin needed to be covered. Blood needed to be shed. A substitute needed to die in the place of the guilty. John says that when Jesus came, He was the propitiation for our sins, and not for ours only, but also for those of the whole world (1 John 2:2). The whole story of the sacrifices was pointing forward to one moment, and that moment has now happened, once and for all.

 

The Jesus John writes about is the Jesus the whole Old Testament was preparing the world for.

 

How to Read 1 John 

It is five short chapters. You can read it in twenty minutes. Read it through, slowly, in one sitting. Then read it again the next day.

 

If you are not sure where to begin, here is something gentle to try. Read chapter 1, paying attention to the opening claim that John was an eyewitness, and to the promise that if we confess our sins, He is faithful and just to forgive us (1 John 1:9). Then sit with chapter 2, looking for the truth test. Then chapter 3, looking for the love test and the righteousness test. Then chapter 4, looking for the two sentences about God. After that, read chapter 5, ending with the assurance verse in 5:13.

 

Keep coming back to this letter throughout your life. Many believers across the centuries have come back to 1 John in seasons when they were not sure their faith was real, and have left the reading with their feet on the ground again.

 

What 1 John Means for Your Life Now

If you are wondering whether your faith is real, return to the three tests. Do you hold the truth about who Jesus is? Do you find yourself, however imperfectly, loving His people? Is your life gradually moving in a different direction than it once was? John says these are the signs of life. Where the signs are present, even faintly, the life is there.

 

If you are wondering whether the Jesus you encountered is the actual Jesus, hold what you encountered up against the Jesus of this letter. The eternal Word of God. Truly come in the flesh. The propitiation for sin. The Son of the Father. The one in whom is eternal life. If the Jesus you met fits that description, it was Him.

 

If you are afraid, return to 1 John 4:18. Perfect love drives out fear. The Father loves you. He sent His Son for you. He is not waiting to punish you. Let the love drive the fear out, slowly, as you keep coming to Him.

 

If you have sinned, return to 1 John 1:9 and 1 John 2:1. If you confess your sins, He is faithful and just to forgive you. And if you sin, you have an advocate with the Father, Jesus Christ the righteous. He is not your accuser. He is your defender. Confession is the door home.

 

And if you ever wonder whether you really have eternal life, return to 1 John 5:13. John wrote the whole letter so that you would know. The Jesus you encountered is the true God and eternal life. He has not gone anywhere. He is with you now. He will be with you all the way home.