Original Verse:
1st John Chapter 4 Verse 20If a man say, I love God, and hateth his brother, he is a liar: for he that loveth not his brother whom he hath seen, how can he love God whom he hath not seen?

Reference Verses:
1st John Chapter 2 Verse 4He that saith, I know him, and keepeth not his commandments, is a liar, and the truth is not in him.
John Chapter 13 Verse 35By this shall all men know that ye are my disciples, if ye have love one to another.
1st John Chapter 3 Verse 17But whoso hath this world's good, and seeth his brother have need, and shutteth up his bowels of compassion from him, how dwelleth the love of God in him?
1st John Chapter 4 Verse 12No man hath seen God at any time. If we love one another, God dwelleth in us, and his love is perfected in us.