Knowing How to Grow As A Christian (1 John 1:5-2:2)

John writes as an eyewitness handing the baton from the first generation of Christians to the next. John begins not with human opinion about God, but with what Jesus revealed: “God is light, and in him is no darkness at all.” God is truth, righteousness, and purity without contradiction, hidden corruption, or evil. Sin only makes sense because holiness is real. God creates and sin corrupts. God forms and sin deforms. God builds and sin breaks. God gives life and sin brings death.

The Christian life therefore cannot measure growth only by Bible reading, prayer, theology, service, giving, or years spent in church. Christian growth shows itself in what happens when God exposes something sinful that a person would rather keep hidden. Sin cannot be repented of when it is ignored, confessed when it is denied, or changed when it is protected in secrecy. Growth comes through dealing honestly with the reality of sin.

John rejects cheap grace, which wants forgiveness without a changed direction. Christianity is not moral perfection, but it is a new life direction. A Christian may stumble into darkness, but cannot make peace with darkness as a settled lifestyle. Jesus is not an accessory, an echo chamber, or a forgiveness card. Jesus is Savior and Lord, and his lordship means that Scripture gets to set the direction of life.

John also rejects naive sentimentalism, the idea that people are basically good and merely damaged by outside forces. The Bible gives a more honest diagnosis: sinners need a Savior. Confession means calling sin what God calls it, without blame-shifting, excuses, soft language, or comparison with worse people. “I was wrong. I sinned. Will you forgive me?” becomes a pathway not to shame, but freedom. Hidden sin acts like an infected wound. Kept covered, it grows, deepens, distorts, and gains power. Brought into the light, it can be cleansed and healed.

John finally brings the good news: “If anyone does sin, we have an advocate with the Father, Jesus Christ the righteous.” Moralism runs from God when sin is exposed. Christianity runs to God. Jesus is the propitiation for sin, the sacrifice and penalty taker who satisfied divine justice on the cross. Christ has paid the debt, so God will not demand payment twice. Christian growth is not pretending to need less grace. Christian growth is becoming quicker to repent, more honest about sin, and more confident that Jesus forgives in full.

##

---

Key Takeaways

• 1. God’s holiness exposes sin’s true nature God’s light reveals more than isolated mistakes. God’s holiness shows that sin is a twisting of what he made good, true, and beautiful. A crooked line only appears crooked because a straight line exists. Honest repentance begins by looking at sin in the light of God’s character rather than redefining it by cultural standards. [43:40]
• 2. Grace changes a life’s direction Cheap grace wants Jesus as rescuer without receiving him as Lord. John distinguishes stumbling into sin from walking comfortably in darkness as a chosen direction. A Christian still sins, but the Spirit makes settled rebellion miserable rather than normal. Jesus saves sinners in order to reshape their desires and direction. [47:54]
• 3. Hidden sin grows in darkness Sin works like an infected wound left covered up. Secrecy allows it to deepen, distort identity, drain energy, and master the heart. Confession brings the wound into the light of Christ, where cleansing and healing begin. Freedom is not found by pretending there is no sin, but by refusing to hide it. [54:09]
• 4. Confession owns sin without excuses Confession refuses the language of blame, self-protection, and comparative righteousness. “I sinned” is a hard sentence, but it is also a liberating one because it places guilt where grace can meet it. God already knows what is hidden, so confession does not inform him but brings the heart into agreement with reality. God proves faithful and just by forgiving and cleansing those who confess. [63:28]
• 5. Jesus is the righteous advocate Jesus does not merely ask the Father to overlook sin. Jesus stands as the righteous advocate because he has already taken sin’s penalty at the cross. His blood cleanses from all unrighteousness, and his sacrifice satisfies divine justice completely. Christians therefore run to God when sin is exposed, trusting that Christ’s payment is enough.
  
  ## [69:31]

Youtube Chapters

• [00:00] - Welcome
• [34:04] - Knowing You Know God
• [35:06] - How Christian Growth Is Measured
• [36:45] - The Sin That Stays Hidden
• [39:33] - God Is Holy, Sinners Need a Savior
• [40:22] - God Is Light
• [42:29] - Light, Truth, and Righteousness
• [44:55] - Three False Gospels
• [47:06] - Cheap Grace and Walking in Darkness
• [52:46] - Walking in the Light Together
• [54:09] - Sin as an Infected Wound
• [57:50] - Naive Sentimentalism and Denial
• [63:02] - Confession Begins Freedom
• [64:41] - Comparative Perfectionism
• [67:04] - Jesus Christ, the Righteous Advocate
• [70:30] - Quick Repentance and Real Growth
• [72:53] - Communion and Christ’s Cleansing Blood

Bible Reading

1 John 1:5-10

Verse 5: “This is the message we have heard from him and proclaim to you, that God is light, and in him is no darkness at all.” [40:09]

Verse 6: “If we say we have fellowship with him while we walk in darkness, we lie and do not practice the truth.” [47:28]

Verse 7: “But if we walk in the light, as he is in the light, we have fellowship with one another, and the blood of Jesus his Son cleanses us from all sin.” [52:34]

Verse 8: “If we say we have no sin, we deceive ourselves, and the truth is not in us.” [59:42]

Verse 9: “If we confess our sins, he is faithful and just to forgive us our sins and to cleanse us from all unrighteousness.” [01:03:11]

Verse 10: “If we say we have not sinned, we make him a liar, and his word is not in us.” [01:05:44]

1 John 2:1-2

Verse 1: “My little children, I am writing these things to you so that you may not sin. But if anyone does sin, we have an advocate with the Father, Jesus Christ the righteous.” [01:08:09]

Verse 2: “He is the propitiation for our sins, and not for ours only but also for the sins of the whole world.” [01:09:58]

Psalm 119:105

“Your word is a lamp to my feet and a light to my path.” [42:51]

Ephesians 2:1

“And you were dead in the trespasses and sins.” [01:01:12]

Observation questions

1. In 1 John 1:5-10, what different claims do people make about sin, and what does John say is wrong with each claim?
2. What is the difference between “walking in darkness” and stumbling into sin? [47:54]
3. According to 1 John 1:7, what two results come from walking in the light?
4. In 1 John 2:1-2, what titles and actions are given to Jesus when a believer sins? [01:09:58]

Interpretation questions

1. Why does John begin with God’s holiness—“God is light”—before addressing human sin? How does God’s character become the standard by which sin is recognized? [43:21]
2. John says believers should not sin, but then immediately speaks of Jesus as an advocate “if anyone does sin.” How does this hold together both a changed life and the reality that Christians still sin? [01:07:47]
3. What does confession mean in practical terms? Why is saying, “I sinned,” different from saying, “Mistakes were made,” or “I am sorry you were offended”? [01:03:42]
4. Why can God be both “faithful and just” when he forgives confessed sin? What does Jesus’ death have to do with God not requiring payment for sin twice? [01:09:27]

Application questions

1. When God exposes sin through Scripture, conviction, or a conversation with someone else, what is usually the first response: hiding, minimizing, blaming, comparing, or confessing? What might it look like to respond more quickly by stepping into the light? [01:11:37]
2. Is there a pattern of sin that has been treated more like a private struggle, personality trait, or “issue” than something that needs honest confession and repentance? What would it mean to call it what God calls it? [01:03:42]
3. Hidden sin can work like an infected wound: it grows, drains energy, and distorts a person over time. Is there a burden, secret, or unresolved conflict that needs to be brought before God and perhaps shared wisely with a trusted mature believer? [54:39]
4. Think about a recent conflict at home, work, or church. What would it sound like to replace excuses with these simple words: “I was wrong. I sinned. Will you forgive me?” [01:06:17]
5. Where is the temptation strongest to compare personal righteousness with someone else’s failures? How does remembering God’s holiness change that comparison? [01:06:11]
6. When sin is exposed, does the instinct tend to be to avoid God until things feel cleaned up? What would it look like this week to run to Jesus immediately, trusting that he is the righteous advocate? [01:12:11]
7. Christian growth is not becoming someone who needs less grace, but becoming more honest about sin and more confident in Christ’s forgiveness. What is one concrete practice that could help build a habit of quick repentance this week? [01:10:42]