But whoever hates his brother is in the darkness and walks in the darkness; he does not know where he is going, because the darkness has blinded his eyes.
By this the children of God and the children of the devil are revealed: Anyone who does not practice righteousness is not of God, nor is anyone who does not love his brother.
If anyone says, “I love God,” and yet hates his brother, he is a liar. For he who does not love his brother whom he has seen, how can he love God whom he has not seen?