Then, no. Christians struggle with sin. True believers have been set free from the power and penalty of sin, but still need to walk in the Spirit so as not to give in to temptation to sin. That is what much of the NT addresses, including 1 John.
No, he is not.
Some accommodator of sin made that interpretation up to both keep his own sin, and to keep others in bondage to the devil.
He certainly is. That is why he tells those to whom he is writing to continually confess their sins. If all one had to do was confess once and that was it, then what John states makes no sense. Again, it's about understanding what John actually wrote, since he didn't write in English as you seem to think.
It is the word of God.
God's seed, and every other kind of seed can only bring forth after itself.
As apple seeds will never bring forth onions, so too, God's seed will never bring forth liars, adulterers, or thieves.
Of course, I agree. However, what you keep failing to accept, is that everything takes time to grow to maturity. Everything. As seed is a seed, not a plant or a tree.
By "sinner", I means someone who commits a sin.
All sinners are unbelievers.
Except this isn't true. John and the rest of the NT writers make it clear that all believers, including themselves, struggle with sin. All unbelievers are sinners, but not all sinners are unbelievers. The NT makes a very clear distinction between those whose lives are characterized by unrepentant, wilful, habitual sin, and those who are justified by grace who still struggle with sin as the seed of God in them continues to grow towards maturity.
True believers don't commit sin.
True believers have cast off the flesh, and walk in the Spirit.
That doesn’t mean true believers don’t sin.
If they need to confess a sin, the sin manifests that they are not born of God's seed.
One cannot have the Holy Spirit in them, and commit sin.
Nowhere is that stated on Scripture. John is absolutely clear that believers do struggle with sin, which is why they are to continually confess their sins for forgiveness.
There is no error in the fact that God's seed cannot bring forth liars, murderers, or thieves.
You need to be much more clear in what you are saying. To call someone a liar is to state something about their character, something that defines them, based on a repeated pattern of purposeful, unconfessed behaviour. But that is far different from someone, who in the heat of a moment, without thinking, responds with a lie but then later confesses. There is a significant difference.
As I said..."I will remind you of
1 John 3:10..."In this the children of God are manifest, and the children of the devil: whosoever doeth not righteousness is not of God, neither he that loveth not his brother."
All the unregenerated "practice" sin.
If they had ever actually "ceased from sin", your point might be worth considering, but they never quit sinning in the first place, so their entire life is "in sin".
Again, John is talking about those whose life is characterized by wilful, unrepentant, habitual sin. Look closer at what else John states:
1Jn 3:7 Little children, let no one deceive you.
Whoever practices righteousness is righteous, as he is righteous.
1Jn 3:8 Whoever makes a practice of sinning is of the devil, for the devil has been sinning from the beginning. The reason the Son of God appeared was to destroy the works of the devil.
1Jn 3:9 No one born of God makes a practice of sinning, for God's seed abides in him; and he cannot keep on sinning, because he has been born of God.
1Jn 3:10 By this it is evident who are the children of God, and who are the children of the devil:
whoever does not practice righteousness is not of God, nor is the one who does not love his brother. (ESV)
Those who do not practice righteousness are not of God; they cannot do righteousness. True believers, however, can and do practice righteousness. What John is pointing out in 1 John is that while true believers practice righteousness, they still struggle with sin when tempted, and unbelievers' lives are not only characterized by sin, but they cannot do righteousness.
So believers are not "natural" ?
If one still needs to put off sin, or the "flesh", they are not believers.
They are the not yet regenerated.
The point is that in nature, such things are unnatural, and that is the basis as to why James says, "these things ought not to be so":
Jas 3:9
With it we bless our Lord and Father,
and with it we curse people who are made in the likeness of God.
Jas 3:10
From the same mouth come blessing and cursing. My brothers, these things ought not to be so. (ESV)
And, that is why Paul says the following:
Col 3:5
Put to death therefore what is earthly in you: sexual immorality, impurity, passion, evil desire, and covetousness, which is idolatry.
Col 3:6 On account of these the wrath of God is coming.
Col 3:7 In these you too once walked, when you were living in them.
Col 3:8
But now you must put them all away: anger, wrath, malice, slander, and obscene talk from your mouth. (ESV)
This is a meaningless command if these things were impossible for true believers. That is the message throughout the NT--to live holy and stop sinning against each other and God, precisely because it is inconsistent with being a follower of Christ. What it does not mean is that they aren't true followers of Christ.
1Co 3:1 But I,
brothers, could not address you as spiritual people, but as
people of the flesh, as infants in Christ.
1Co 3:2 I fed you with milk, not solid food,
for you were not ready for it. And even now you are not yet ready,
1Co 3:3
for you are still of the flesh.
For while there is jealousy and strife among you, are you not of the flesh and behaving only in a human way?
1Co 3:4 For when one says, “I follow Paul,” and another, “I follow Apollos,”
are you not being merely human?
1Co 3:5 What then is Apollos? What is Paul? Servants through whom
you believed,
as the Lord assigned to each.
1Co 3:6 I planted, Apollos watered, but God gave the growth.
1Co 3:7 So neither he who plants nor he who waters is anything, but only God who gives the growth.
1Co 3:8 He who plants and he who waters are one, and each will receive his wages according to his labor.
1Co 3:9 For we are God's fellow workers.
You are God's field, God's building.
...
1Co 3:21 So let no one boast in men. For all things are yours,
1Co 3:22 whether Paul or Apollos or Cephas or the world or life or death or the present or the future—all are yours,
1Co 3:23 and
you are Christ's, and Christ is God's. (ESV)
Notice first that Paul calls these people "brothers," "infants in Christ," and "God's field, God's building." He also states that they have "believed, as the Lord assigned to each" and that belong to Christ. Believers through and through. Yet, we then clearly notice that they are sinning, "as people of the flesh" and "behaving only in a human way," by being jealous and creating strife. The third thing we notice is that they were fed "with milk, not solid food," and were even then "not yet ready" for "solid food." That sure sounds like there needs to be growth towards maturity and that happens by putting away the fleshly struggles with sin. There are numerous such examples throughout the NT.
Also:
1Co 5:1 It is actually reported that there is sexual immorality among you, and of a kind that is not tolerated even among pagans, for a man has his father's wife. (ESV)
Do you not think it is a sin to tolerate such sin? Paul certainly seems to think so.
There is even a direct example of Peter having sinned:
Gal 2:11 But when Cephas came to Antioch, I opposed him to his face,
because he stood condemned.
Gal 2:12 For before certain men came from James, he was eating with the Gentiles; but when they came he drew back and separated himself, fearing the circumcision party.
Gal 2:13 And the rest of the Jews acted hypocritically along with him, so that even Barnabas was led astray
by their hypocrisy.
Gal 2:14 But when I saw that
their conduct was not in step with the truth of the gospel, I said to Cephas before them all, “If you, though a Jew, live like a Gentile and not like a Jew, how can you force the Gentiles to live like Jews?” (ESV)