10. You can tell God's children from the devil's children, because those who belong to the devil refuse to do right or to love each other.
11. From the beginning you were told that we must love each other.
12. Don't be like Cain, who belonged to the devil and murdered his own brother. Why did he murder him? He did it because his brother was good, and he was evil.
13. My friends, don't be surprised if the people of this world hate you.
14. Our love for each other proves that we have gone from death to life. But if you don't love each other, you are still under the power of death.
15. If you hate each other, you are murderers, and we know that murderers do not have eternal life.
16. We know what love is because Jesus gave his life for us. That's why we must give our lives for each other.