See how much the Father has loved us! His love is so great that we are called God's children — and so, in fact, we are. This is why the world does not know us: it has not known God. 2My dear friends, we are now God's children, but it is not yet clear what we shall become. But we know that when Christ appears, we shall be like him, because we shall see him as he really is. 3Everyone who has this hope in Christ keeps himself pure, just as Christ is pure.
4Whoever sins is guilty of breaking God's law, because sin is a breaking of the law. 5
You know that Christ appeared in order to take away sins,3.5 sins; some manuscripts have our sins. and that there is no sin in him. 6So everyone who lives in union with Christ does not continue to sin; but whoever continues to sin has never seen him or known him.
7Let no one deceive you, my children! Whoever does what is right is righteous, just as Christ is righteous. 8Whoever continues to sin belongs to the Devil, because the Devil has sinned from the very beginning. The Son of God appeared for this very reason, to destroy what the Devil had done.
9None of those who are children of God continue to sin, for God's very nature is in them; and because God is their Father, they cannot continue to sin. 10This is the clear difference between God's children and the Devil's children: all who do not do what is right or do not love others are not God's children.
The message you heard from the very beginning is this: we must love one another. 12
We must not be like Cain; he belonged to the Evil One and murdered his own brother Abel. Why did Cain murder him? Because the things he himself did were wrong, but the things his brother did were right.
13So do not be surprised, my brothers and sisters, if the people of the world hate you. 14
We know that we have left death and come over into life; we know it because we love our brothers and sisters. Whoever does not love is still under the power of death. 15All who hate others are murderers, and you know that murderers have not got eternal life in them. 16This 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! 17Rich people who see a brother or sister in need, yet close their hearts against them, cannot claim that they love God. 18My children, our love should not be just words and talk; it must be true love, which shows itself in action.
19This, then, is how we will know that we belong to the truth; this is how we will be confident in God's presence. 20If our conscience condemns us, we know that God is greater than our conscience and that he knows everything. 21And so, my dear friends, if our conscience does not condemn us, we have courage in God's presence. 22We receive from him whatever we ask, because we obey his commands and do what pleases him. 23
What he commands is that we believe in his Son Jesus Christ and love one another, just as Christ commanded us. 24Those who obey God's commands live in union with God and God lives in union with them. And because of the Spirit that God has given us we know that God lives in union with us.