Whatever
1 John 3:9 Whoever has been born of God does not sin, for His seed remains in him; and he cannot sin, because he has been born of God.
I can understand this in two ways, the one born of God cant sin the sin of apostacy, because that nature being born of God cant sin period, being born of incorruptible seed 1 Pet 1:23
23
Being born again, not of corruptible seed, but
of incorruptible, by the word of God, which liveth and abideth for ever.
Or True Believers are the Seed of Christ, the Son of David, and God made an everlasting Covenant with David His Chosen, typical of Christ, that his seed would endure forever Ps 89:28-29,35,36
28 My mercy will I keep for him for evermore, and my covenant shall stand fast with him.
29
His seed also will I make to endure for ever, and his throne as the days of heaven.
35 Once have I sworn by my holiness that I will not lie unto David.
36
His seed shall endure for ever, and his throne as the sun before me.
The word endure means:
to abide, remain, continue
So 1 Jn 3:9 declares Christs seed, remains, continues, in Him