1 John 4:19-21 (New International Version)

 ¹⁹We love because he first loved us. ²⁰If anyone says, "I love God," yet hates his brother, he is a liar. For anyone who does not love his brother, whom he has seen, cannot love God, whom he has not seen. ²¹And he has given us this command: Whoever loves God must also love his brother.