10 By this the children of God and the children of the devil are evident: everyone who does not practice righteousness is not of God, namely, the one who does not love his brother.
11 For this is the message that you have heard from the beginning: that we should love one another,
12 not as Cain, who was of the evil one and violently murdered his brother. And for what reason did he violently murder him? Because his deeds were evil and the deeds of his brother were righteous.
13 Do not marvel, brothers, if the world hates you.
14 We know that we have passed over from death to life because we love the brothers. The one who does not love remains in death.
15 Everyone who hates his brother is a murderer, and you know that every murderer does not have eternal life residing in him.
16 We have come to know love by this: that he laid down his life on behalf of us, and we ought to lay down our lives on behalf of the brothers.