[1 John 3:8-12]

8 He who does what is sinful is of the devil, because the devil has been sinning from the beginning. The reason the Son of God appeared was to destroy the devil's work.
9 No one who is born of God will continue to sin, because God's seed remains in him; he cannot go on sinning, because he has been born of God.
10 This is how we know who the children of God are and who the children of the devil are: Anyone who does not do what is right is not a child of God; nor is anyone who does not love his brother.
11 This is the message you heard from the beginning: We should love one another.
12 Do not be like Cain, who belonged to the evil one and murdered his brother. And why did he murder him? Because his own actions were evil and his brother's were righteous.