4 Anyone who says, “I know God,” but does not obey God’s commands is a liar, and the truth is not in that person.
5 But if someone obeys God’s teaching, then in that person God’s love has truly reached its goal. This is how we can be sure we are living in God:
6 Whoever says that he lives in God must live as Jesus lived.
7 My dear friends, I am not writing a new command to you but an old command you have had from the beginning. It is the teaching you have already heard.
8 But also I am writing a new command to you, and you can see its truth in Jesus and in you, because the darkness is passing away, and the true light is already shining.
9 Anyone who says, “I am in the light,” but hates a brother or sister, is still in the darkness.
10 Whoever loves a brother or sister lives in the light and will not cause anyone to stumble in his faith.