1 John 4:20

If anyone says, “I love God,” yet hates his brother, he is a liar. For the person who does not love his brother he has seen cannot love the God he has not seen.

1 John 2:4

The one who says, “I have come to know Him,” yet doesn"t keep His commands, is a liar, and the truth is not in him.

1 John 2:9

The one who says he is in the light but hates his brother is in the darkness until now.

1 John 3:17

If anyone has this world’s goods and sees his brother in need but closes his eyes to his need—how can God’s love reside in him?

1 John 4:12

No one has ever seen God. If we love one another, God remains in us and His love is perfected in us.

1 John 2:11

But the one who hates his brother is in the darkness, walks in the darkness, and doesn’t know where he’s going, because the darkness has blinded his eyes.

1 Peter 1:8

You love Him, though you have not seen Him. And though not seeing Him now, you believe in Him and rejoice with inexpressible and glorious joy,

1 John 1:6

If we say, “We have fellowship with Him,” yet we walk in darkness, we are lying and are not practicing the truth.

Treasury of Scripture Knowledge

Summary

If 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?

Bible References

A man

1 John 2:4
The one who says, “I have come to know Him,” yet doesn"t keep His commands, is a liar, and the truth is not in him.
1 John 3:17
If anyone has this world’s goods and sees his brother in need but closes his eyes to his need—how can God’s love reside in him?

Not

1 John 4:12
No one has ever seen God. If we love one another, God remains in us and His love is perfected in us.

General references

Matthew 22:40
All the Law and the Prophets depend on these two commands.”
Matthew 25:42
For I was hungry
and you gave Me nothing to eat;
I was thirsty
and you gave Me nothing to drink;
John 13:35
By this all people will know that you are My disciples, if you have love for one another.”
John 14:15
“If you love Me, you will keep My commands.
Hebrews 13:1
Let brotherly love continue.

Holman Christian Standard Bible®, Copyright © 1999, 2000, 2002, 2003, 2009 by Holman Bible Publishers.