1 John 3:9

Whosoever is born of God--literally, "Everyone that is begotten of God." doth not commit sin--His higher nature, as one born or begotten of God, doth not sin. To be begotten of God and to sin, are states mutually excluding one another. In so far as one sins, he makes it doubtful whether he be born of God. his seed--the living word of God, made by the Holy Spirit the seed in us of a new life and the continual mean of sanctification. remaineth--abideth in him (compare Note, see on Jo1 3:6; Joh 5:38). This does not contradict Jo1 1:8-9; the regenerate show the utter incompatibility of sin with regeneration, by cleansing away every sin into which they may be betrayed by the old nature, at once in the blood of Christ. cannot sin, because he is born of God--"because it is of God that he is born" (so the Greek order, as compared with the order of the same words in the beginning of the verse); not "because he was born of God" (the Greek is perfect tense, which is present in meaning, not aorist); it is not said, Because a man was once for all born of God he never afterwards can sin; but, Because he is born of God, the seed abiding now in Him, he cannot sin; so long as it energetically abides, sin can have no place.

— Jamieson-Fausset-Brown Commentary (public domain)