1 John 2:1-9

1 My little children, I am writing these things to you so that you may not sin. But if anyone does sin, we have an advocate with the Father, Jesus Christ the righteous;
2 and he is the atoning sacrifice for our sins, and not for ours only but also for the sins of the whole world.
3 Now by this we may be sure that we know him, if we obey his commandments.
4 Whoever says, "I have come to know him," but does not obey his commandments, is a liar, and in such a person the truth does not exist;
5 but whoever obeys his word, truly in this person the love of God has reached perfection. By this we may be sure that we are in him:
6 whoever says, "I abide in him," ought to walk just as he walked.
7 Beloved, I am writing you no new commandment, but an old commandment that you have had from the beginning; the old commandment is the word that you have heard.
8 Yet I am writing you a new commandment that is true in him and in you, because the darkness is passing away and the true light is already shining.
9 Whoever says, "I am in the light," while hating a brother or sister, is still in the darkness.