But the one who hates his brother is in the darkness, walks in the darkness, and doesn’t know where he’s going, because the darkness has blinded his eyes.
This is how God’s children — and the Devil’s children — are made evident. Whoever does not do what is right is not of God, especially the one who does not love his brother.
unlike Cain, who was of the evil one and murdered his brother. And why did he murder him? Because his works were evil, and his brother’s were righteous.