3:10 By this the children of God and the children of the devil are revealed: Everyone who does not practice righteousness—the one who does not love his fellow Christian—is not of God.

11 For this is the gospel message that you have heard from the beginning: that we should love one another, 12 not like Cain who was of the evil one and brutally murdered his brother. And why did he murder him? Because his deeds were evil, but his brother’s were righteous.

13 Therefore do not be surprised, brothers and sisters, if the world hates you. 14 We know that we have crossed over from death to life because we love our fellow Christians. The one who does not love remains in death. 15 Everyone who hates his fellow Christian is a murderer, and you know that no murderer has eternal life residing in him. 16 We have come to know love by this: that Jesus laid down his life for us; thus we ought to lay down our lives for our fellow Christians. 17 But whoever has the world’s possessions and sees his fellow Christian in need and shuts off his compassion against him, how can the love of God reside in such a person?

18 Little children, let us not love with word or with tongue but in deed and truth. 19 And by this we will know that we are of the truth and will convince our conscience in his presence, 20 that if our conscience condemns us, that God is greater than our conscience and knows all things. 21 Dear friends, if our conscience does not condemn us, we have confidence in the presence of God, 22 and whatever we ask we receive from him, because we keep his commandments and do the things that are pleasing to him. 23 Now this is his commandment: that we believe in the name of his Son Jesus Christ and love one another, just as he gave us the commandment. 24 And the person who keeps his commandments resides in God, and God in him. Now by this we know that God resides in us: by the Spirit he has given us.

4:1 Dear friends, do not believe every spirit, but test the spirits to determine if they are from God, because many false prophets have gone out into the world. 2 By this you know the Spirit of God: Every spirit that confesses Jesus as the Christ who has come in the flesh is from God, 3 but every spirit that refuses to confess Jesus, that spirit is not from God, and this is the spirit of the antichrist, which you have heard is coming, and now is already in the world.

4 You are from God, little children, and have conquered them because the one who is in you is greater than the one who is in the world. 5 They are from the world; therefore they speak from the world’s perspective and the world listens to them. 6 We are from God; the person who knows God listens to us, but whoever is not from God does not listen to us. By this we know the Spirit of truth and the spirit of deceit.