4 Everyone who practices sin also practices lawlessness, and sin is lawlessness. 5 And you know that that one was revealed in order that he might take away sins, and in him there is no sin. 6 Everyone who resides in him does not sin. Everyone who sins has neither seen him nor known him. 7 Little children, let no one deceive you: the one who practices righteousness is righteous, just as that one is righteous. 8 The one who practices sin is of the devil, because the devil has been sinning from the beginning. For this reason the Son of God was revealed: in order to destroy the works of the devil. 9 Everyone who is fathered by God does not practice sin, because his seed resides in him, and he is not able to sin, because he has been fathered by God. 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.

God is Love, so Love One Another

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⌋a did he violently murder him? Because his deeds were evil and the deeds of his brother were righteous.

13 Do not marvel,b 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.