1 John 4:21

That [ι ν α]. Not defining the contents of the commandment, but expressing intent. Compare John 13:34, and see on John 14:13. His brother. "To the persecutor Saul, Christ said, 'Saul, Saul, why persecutest thou Me? I have ascended into heaven, yet still I lie upon earth. Here I sit at the right hand of the Father; there I still hunger, thirst, and am a stranger '" (Augustine).