15. All who hate others are murderers, and you know that murderers have not got eternal life in them.
16. This is how we know what love is: Christ gave his life for us. We too, then, ought to give our lives for our brothers and sisters!
17. Rich people who see a brother or sister in need, yet close their hearts against them, cannot claim that they love God.
18. My children, our love should not be just words and talk; it must be true love, which shows itself in action.
19. This, then, is how we will know that we belong to the truth; this is how we will be confident in God's presence.
20. If our conscience condemns us, we know that God is greater than our conscience and that he knows everything.