God forgives our sins because of Jesus' death
1 I am writing this letter to you, my friends who are like my little children. I am writing to you because I do not want you to do wrong things. But if anyone among you does something wrong, there is someone who will speak to God on our behalf. That person is Jesus Christ, who always does only what is right. He will ask our Father God to forgive you. 2 Jesus died as a sacrifice to take the punishment for our sin. Then God could forgive us and not punish us. Jesus did that not only for us. He did it for all people in the world, so that God could forgive them for their sins.
3 How can we be sure that we really know God and we belong to him? We can be sure of that if we obey God's rules. 4 Someone may say, ‘I belong to God.’ But if he does not obey God's rules, that person is telling a lie. He is not living in the way that God's true message teaches us. 5 But anyone who obeys God's message shows that he really loves God completely. So, this is how we know that we belong to God. 6 If we say that we are living in God's true way, then we must live in the way that Jesus lived.
2:6If we believe in Jesus Christ and we trust God, this means that we belong to God. We are united with God and with Jesus. The way that we live shows whether we are true believers.