1 John 3:7-8
7-8So, my dear children, don't let anyone divert you from the truth. It's the person who acts right who is right, just as we see it lived out in our righteous Messiah. Those who make a practice of sin are straight from the Devil, the pioneer in the practice of sin. The Son of God entered the scene to abolish the Devil's ways.
9-10People conceived and brought into life by God don't make a practice of sin. How could they? God's seed is deep within them, making them who they are. It's not in the nature of the God-begotten to practice and parade sin. Here's how you tell the difference between God's children and the Devil's children: The one who won't practice righteous ways isn't from God, nor is the one who won't love brother or sister. A simple test.