1 John 1:8 is NOT about a true Christian, and neither is verse 6 and 10. Read chapter 4:1-3. That is who John is talking about in 1:6, 8 and 10. And that same heresy is being preached today. Ever heard that our past, "present and future" sins are forgiven? Beware of all apathy toward committing present and future sins.
5 This is the message which we have heard from Him and declare to you, that God is light and in Him is no darkness at all. 6 If we say that we have fellowship with Him, and walk in darkness, we lie and do not practice the truth. 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 Christ His Son cleanses us from all sin. 8 If we say that we have no sin, we deceive ourselves, and the truth is not in us.
Can you honestly say verse 6 is about a true Christian? How can that be when they loved darkness, not God? It corresponds with 3:19 "And this is the condemnation, that the light has come into the world, and men
loved darkness rather than light, because their deeds were evil."
EVIL!!! To say this chapter is all about Christians is ludicrous.
Now focus on verse 7 above with regards to the true meaning of 8. So do we still have sin if the blood of Jesus cleanses us from all sin? Just how weak do they believe the blood of Jesus is? Is sin cleansed today, and back tomorrow??? How many times does Jesus have to die for the same sin? No! Just as 6 does not describe a true Christian, neither does 8 which is similar in wording and meaning to 10.
Since Adam, all have sinned and fallen short of the glory of God. But don't you see that is
only until that sin is cleansed when we come to Jesus, never to come back. So all of our past sins are forgiven. 2 Peter 1:9 "For he who lacks these things is shortsighted, even to blindness, and has forgotten that he was cleansed from his
old sins.
That leaves present and future sins to deal with. What is different between those under the law and those under grace is that grace, itself, is now God's power in us to no longer sin, whereas those under the law had no such power, only their weak carnal nature. We walk in the Spirit; therefore, that power of God IN us helps us to not desire the sin of the old nature that is now dead, and made new in Christ. Those without this new nature under the control of the Holy Spirit do not belong to Christ, because they are still choosing darkness over the light.
The Holy Spirit's power in us is why John says in
1 John 3:9 a Christian CANNOT sin. Why, because God doesn't sin. And through grace, God is indwelling us and his laws are written on our hearts.
I'm sorry to say that there are some on this forum who know they do not have any power over sin, and want to stand on
1 John 1:8 and
Romans 7 to justify their weakness to choose darkness; both of which are about those BEFORE Christ. (Romans 7 is about those still under the law before coming to Christ.) If that is you, then as Jesus said to the church of Ephesus, "Go back and do the first works." That means to repent from those sins you keep committing and mean it this time. Stop loving darkness. If you do, (vs. 9) He is faithful and just to forgive you and cleanse you of all unrighteousness. And as Acts 2:38 says, Jesus will give you the Holy Spirit to empower you to no longer willfully sin.