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;
and he is the atoning sacrifice for our sins, and not for ours only but also for the sins of the whole world.
Now by this we may be sure that we know him, if we obey his commandments.
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;
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:
whoever says, "I abide in him," ought to walk just as he walked.
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.
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.
References for 1 John 2:8
Whoever says, "I am in the light," while hating a brother or sister, is still in the darkness.
References for 1 John 2:9
Whoever loves a brother or sister lives in the light, and in such a person there is no cause for stumbling.
References for 1 John 2:10
But whoever hates another believer is in the darkness, walks in the darkness, and does not know the way to go, because the darkness has brought on blindness.
References for 1 John 2:11