Anyone who says, “I love God,” but hates their sibling, is a liar. For whoever doesn’t love their sibling whom they have seen, cannot love God whom they have not seen.
But anyone who hates their sibling is in the darkness, and walks in the darkness, and doesn’t know where they are going, because the darkness has blinded their eyes.
In this, the children of God and the children of the devil are revealed: whoever does not practice righteousness is not of God, nor is the one who doesn’t love their sibling.