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Self-Deception (1 John 1:8)

From the beginning. An exposition of the first Letter of John.

8If we say that we have no sin, we are deceiving ourselves and the truth is not in us.

1 John 1:8
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In verse 6, John had already spoken about someone saying that he has fellowship with God. Now John presents a second case.

Second case: Someone claims to have no sin

Someone says that he has no sin. What does that mean? If we look at the context, this does not seem to be about acts of sin. That is as in verse 9 (“If we confess our sins”) and verse 10 (“have not sinned”). Here it is about sin, meaning original sin within us.

Sins and sin as a ruling principle

Anyone who reads God’s Word carefully will quickly notice a distinction. It distinguishes between committed sins and sin as the ruling principle within us. See Romans 3:23; Romans 5:12. The latter is the root, and the other is the fruit that grows from it. We sin because we are sinners. So, man has a twofold problem and therefore needs a twofold solution. He needs forgiveness of his sins and liberation from the power of sin.

Forgiveness and freedom from sin’s power

Anyone who believes in the Lord Jesus may know his sins have been forgiven. He also died to sin with the Lord Jesus. See Romans 6:10–11. That means the sin dwelling in us no longer has power over us. The believer no longer has to sin. But he still can. See 1 John 2:1. It is true that God gave us a new nature in the new birth. That nature cannot sin. See 1 John 3:9. But we never read that we no longer have the old, sinful nature.

Three aspects: penalty, power, presence

We can summarize it like this. We have forgiveness of our sins, meaning we are no longer punished for them. In the same way, we have already been freed from the power of sin. So we no longer have to sin. But we will be freed from the presence of sin only when the Lord Jesus comes. He will take us to Himself in glory. See Philippians 3:21; 1 John 3:2. Or we will be freed when we die before that happens. 3333

Denying indwelling sin

But now we have someone who denies this very fact. He says: I do not have that. He claims there is no power in him that could lead him to sin. He is claiming nothing less than sinlessness for himself. Where there is no root, there are no fruits either. But how can someone who walks in the light (v. 7) say such a thing?

A sensitive conscience after conversion

It is remarkable that new converts often feel they sin far more after conversion. Objectively, it is very likely the exact opposite. But their sensitized conscience testifies to a new spiritual reality. However, denying these facts testifies to a very different reality.

John’s response: self-deception

It is striking that John neither tests this claim nor argues against it. The statement is so obviously false that it is not worth his effort. He does not address it in any substantive way. He simply writes: “… we are deceiving ourselves and the truth is not in us.” Note this carefully. We deceive neither our fellow human beings nor God. No, we deceive ourselves. We mislead ourselves. In doing so, we actually do what Satan wants to do to us.

Relevance today

These verses have not lost their relevance for our day. How many people deceive themselves by always looking for the culprit elsewhere? Is it not repeatedly claimed that man is good in himself? Then it is said only circumstances, society, or trauma caused a terrible act. How many may admit that they are “not perfect.” Yet they think they can regain God’s favor through “good works.” That is nothing else than denying that one has sin.

Coming to the knowledge of the truth

God wants us to come to the knowledge of the truth. That includes admitting our total corruption and guilt before Him. See 1 Timothy 2:4. But regarding people who claim to have no sin, John says this. He says the truth is not in them. That goes one decisive step further than verse 6. There it says that one does not do the truth.

What “the truth” includes

“The truth” includes everything God has revealed to us about Himself through the Lord Jesus. It includes above all the nature and the will of God. God is light, and every person is placed into God’s light. Yet whoever denies having sin proves something. He proves how greatly he has gone astray from God.

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From the beginning. An exposition of the first Letter of John.

Walking in the Light (1 John 1:7)

John contrasts darkness with believers who “walk in the light” of God’s full self-revelation in Christ. This shared light brings true fellowship in God’s family and confidence: Jesus’ once-for-all atoning blood cleanses from all sin, securing peace before God even as daily failures remain.
1 John 1:7

Walking in Darkness (1 John 1:6)

Claiming “fellowship with God” implies possessing eternal life, yet some only profess it. John says a life that habitually “walks in darkness” exposes such claims as lies—regardless of status or religiosity. True believers may still sin, but their characteristic walk is in the light; words must match deeds.
1 John 1:6
From the beginning. An exposition of the first Letter of John.

The Message (1 John 1:5)

Believers are called into fellowship with God, which brings responsibility and must rest on a true, Christ-sourced message grounded in Scripture. 1 John highlights God’s nature: “God is light” and “God is love,” inseparable truths. God’s light exposes sin, yet new birth gives believers God’s nature. John then offers three “If we say…” tests to expose false profession.
1 John 1:5
From the beginning. An exposition of the first Letter of John.

Joy to the Fullest (1 John 1:4)

Believers can already “breathe the air of heaven” through fellowship with the Father and the Son, since eternal life is a present possession. This brings “full” (complete, perfect) joy that can’t be improved. The world offers only temporary pleasures; to enjoy this lasting joy requires practical separation from worldly desires.
1 John 1:4
From the beginning. An exposition of the first Letter of John.

Christian Fellowship (1 John 1:3)

John stresses that the apostles proclaim what they truly saw and heard about Jesus. This testimony invites believers into genuine “fellowship”—sharing God’s interests and thoughts—made possible through eternal life in Christ. True fellowship with God can’t reject apostolic teaching and includes fellowship with the Father about the Son and with the Son about the Father.
1 John 1:3
From the beginning. An exposition of the first Letter of John.

The Eternal Life with the Father (1 John 1:2)

John explains that Christ is “the life” and “eternal life”: uncreated, truly God, eternally in intimate fellowship with the Father, and revealed to us through the incarnation. God’s purpose in this manifestation is that believers share this life and learn what divine life truly looks like—perfectly displayed in Jesus.
1 John 1:2
From the beginning. An exposition of the first Letter of John.

That which was from the Beginning (1 John 1:1)

John’s letter opens urgently with Christ, “the Word of life,” as false teachings threaten believers in the “last hour.” He points back to what was true “from the beginning”: God’s Son became flesh, revealing God and eternal life. Truth doesn’t evolve—new “revelations” must be tested by Scripture and rejected if they depart from it.
1 John 1:1
From the beginning. An exposition of the first Letter of John.

The First Letter of John – Introduction

A brief introduction to 1 John: Early church testimony and its style link the letter to John the Apostle, written late in the first century (c. 96 A.D.). Facing rising false teachers and Gnostic errors about Jesus and eternal life, John warns believers, assures them they truly have eternal life, and describes its marks in practice.
1 John 1