1 Jn 3:7-10
Children, do not let anyone lead you astray. Whoever acts uprightly is upright, just as he is upright. Whoever lives sinfully belongs to the devil, since the devil has been a sinner from the beginning. This was the purpose of the appearing of the Son of God, to undo the work of the devil. No one who is a child of God sins because God’s seed remains in him. Nor can he sin, because he is a child of God. This is what distinguishes the children of God from the children of the devil: whoever does not live uprightly and does not love his brother is not from God.