1 John 3:8-10

8 He who is habitually guilty of sin is a child of the Devil, because the Devil has been a sinner from the very beginning. The Son of God appeared for the purpose of undoing the work of the Devil.

9 No one who is a child of God is habitually guilty of sin. A God-given germ of life remains in him, and he cannot habitually sin--because he is a child of God.

10 By this we can distinguish God's children and the Devil's children: no one who fails to act righteously is a child of God, nor he who does not love his brother man.