3 10The children of God and the children of the devil are revealed in this way: all who do not do what is right are not from God, nor are those who do not love their brothers and sisters.
11 For this is the message you have heard from the beginning, that we should love one another. 12We must not be like Cain who was from the evil one and murdered his brother. And why did he murder him? Because his own deeds were evil and his brother’s righteous. 13Do not be astonished, brothers and sisters, that the world hates you. 14We know that we have passed from death to life because we love one another. Whoever does not love abides in death. 15All who hate a brother or sister are murderers, and you know that murderers do not have eternal life abiding in them. 16We know love by this, that he laid down his life for us—and we ought to lay down our lives for one another. 17How does God’s love abide in anyone who has the world’s goods and sees a brother or sister in need and yet refuses help?
18 Little children, let us love, not in word or speech, but in truth and action. 19And by this we will know that we are from the truth and will reassure our hearts before him 20whenever our hearts condemn us; for God is greater than our hearts, and he knows everything.