It is in the power of my hand to do evil with you, but yesterday the God of your fathers spoke to me, saying, ‘Watch yourself—lest you say anything to Jacob, good or bad.’
But whoever hates his brother is in the darkness and walks in the darkness. He doesn’t know where he is going, because the darkness has made his eyes blind.
It is clear who are the children of God and who are the children of the devil by this—anyone who does not act righteously or love his brother is not of God.
Do not be like Cain, who was from the evil one and murdered his brother. And why did he murder him? Because his deeds were evil, while his brother’s were righteous.