4:16 And we have come to know and to believe the love that God has in us. God is love, and the one who resides in love resides in God, and God resides in him.
1 John 4:20
4:20 If anyone says “I love God” and yet hates his fellow Christian, he is a liar, because the one who does not love his fellow Christian whom he has seen cannot love God whom he has not seen.