If anyone has material possessions and sees his brother in need but has no pity on him, how can the love of God be in him? (1 John 3:17)

If 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.  (1 John 4:20)

John seems to know much about authentic love for God!