“If your brother or sister sins against you, go and point out the fault when the two of you are alone. If you are listened to, you have regained that one.
But whoever hates a brother or sister is in the darkness, walks in the darkness, and does not know the way to go, because the darkness has brought on blindness.
The 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 a brother or sister.
We 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.