1 John 4:20

Whoever says, "I love God," but hates his brother is a liar. The one who does not love his brother whom he has seen cannot love the God whom he has not seen.

1 John 2:4

The person who says, "I have come to know him," but does not continually keep his commandments is a liar, and the truth has no place in that person.

1 John 2:9

The person who says that he is in the light but hates his brother is still in the darkness.

1 John 3:17

Whoever has earthly possessions and notices a brother in need and yet withholds his compassion from him, how can the love of God be present in him?

1 John 4:12

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

1 John 2:11

But the person who hates his brother is in the darkness and lives in the darkness. He does not know where he is going, because the darkness has blinded his eyes.

1 Peter 1:8

Though you have not seen him, you love him. And even though you do not see him now, you believe in him and rejoice with an indescribable and glorious joy,

1 John 1:6

If we claim that we have fellowship with him but keep living in darkness, we are lying and 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 person who says, "I have come to know him," but does not continually keep his commandments is a liar, and the truth has no place in that person.
1 John 3:17
Whoever has earthly possessions and notices a brother in need and yet withholds his compassion from him, how can the love of God be present in him?

Not

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

General references

Matthew 22:40
All the Law and the Prophets depend on these two commandments."
Matthew 25:42
Here's why: I was hungry, and you gave me nothing to eat. I was thirsty, and you gave me nothing to drink.
John 13:35
This is how everyone will know that you are my disciples, if you have love for one another."
John 14:15
"If you love me, keep my commandments.
Hebrews 13:1
Let brotherly love continue.

International Standard Version Copyright © 1996-2008 by the ISV Foundation.