1 John 4:12-13 Spirit of Love

1 John 4:12-13 says, “No one has seen God at any time. If we love one another, God abides in us, and His love has been perfected in us. By this we know that we abide in Him, and He in us, because He has given us of His Spirit.” No one has ever yet seen God. Why does John say this here? How can we love an invisible God? We show love to God by loving the image of God in His people. In other words, love of faulty fellow church goers proves the indwelling of God. That is, possession of the loving Spirit proves “we abide in Him”.