Bible verses sometimes sound contrary to one another but If verses that sound contrary to one another can't be harmonized then the Interpretation that the person has must be In error because GOD Is not the author of confusion.
IE
1 John 3:9
King James Version(KJV)
9.) Whosoever is born of God doth not commit sin; for his seed remaineth in him: and he cannot sin, because he is born of God.
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1 John 1:10
King James Version(KJV)
10.)If we say that we have not sinned, we make him a liar, and his word is not in us.
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JESUS said that the words that HE speaks they are spirit and they are life.
I think that 1 John 3:9 Is talking about the born again person cannot sin In the spirit but 1 John 1:10 Is talking about the person before they came to GOD.