In 1 John 3:9, it says that whosoever is born of God does not commit sin because his seed abides in him; and he cannot sin, because he is born of God.
This is not telling us that we will never sin or cannot commit acts of sin.
Studying the NT scripture from the original language, I come to understand that this is telling me that I can no longer live a lifestyle of sin because I now have God’s Spirit living inside of me preventing that from happening.
In the Greek text, where it tells us that the believer does not commit sin or does not sin, it denotes a continuous action.
As believers, we still commit acts of sin. However, we no longer live a lifestyle of sin as we did prior to receiving Christ because He has given us His Spirit and it is His Spirit that dwells in us that keeps us from sinning (Continuously).
The word abide in this verse means to remain, to abide, or to stay. It is the word Meno in Greek and it denotes permanency.
God’s Spirit is permanently abiding in us and He keeps us from sinning (continuously sinning).
I hope this helps