Is that what John said? 1 John 3:7 Little children, make sure no one deceives you;
the one who practices righteousness is righteous, just as He is righteous; 8
the one who practices sin is of the devil; for the devil has sinned from the beginning. The Son of God appeared for this purpose, to destroy the works of the devil. 9
No one who is born of God practices sin, because His seed abides in him; and he cannot sin, because he is born of God. 10 By this the
children of God and the children of the devil are obvious: anyone who
does not practice righteousness is not of God, nor the one who
does not love his brother.
1 Corinthians 6:9 - Or do you not know that the
unrighteous will not inherit the kingdom of God? Do not be deceived; neither fornicators, nor idolaters, nor adulterers, nor effeminate, nor homosexuals, 10 nor thieves, nor the covetous, nor drunkards, nor revilers, nor swindlers, will inherit the kingdom of God. 11
Such were some of you; but you were washed, but you were sanctified, but you were justified in the name of the Lord Jesus Christ and in the Spirit of our God.
Galatians 5:19 - Now the deeds of the flesh are evident, which are: immorality, impurity, sensuality, 20 idolatry, sorcery, enmities, strife, jealousy, outbursts of anger, disputes, dissensions, factions, 21 envying, drunkenness, carousing, and things like these, of which I forewarn you, just as I have forewarned you, that those who
practice such things will not inherit the kingdom of God. *Compare with 1 John 3:9 -
No one who is born of God practices sin..
Those who go back to their old ways (not merely stumbling, but remaining there) demonstrate they are not truly born of God.
Only unbelievers will be condemned (John 3:18) so what does that say about that servant of the master? The Jews were called the servants of the Lord (Isaiah 43:10) but that does not mean they were all saved.
Galatians 4:6 - And because ye are sons, God hath sent forth the Spirit of his Son into your hearts, crying, Abba, Father. 7 Wherefore thou art no more a servant, but a son; and if a son, then an heir of God through Christ.
John 8:35 - And the servant abideth not in the house for ever: but the Son abideth ever.
So was John confused? 1 John 3:9 -
No one who is born of God practices sin, because His seed abides in him; and he cannot sin, because he is born of God.
That is a two way street.