Yochanan I 4:20

20 If anyone says I have ahavah for Hashem and the Ach b’Moshiach he hates, he is a shakran (liar). For the one not having ahavah for the Ach b’Moshiach of him whom he has seen, how can he have ahavah for the Elohim whom he has not seen?

Yochanan I 4:20 Meaning and Commentary

1 John 4:20

If a man say I love God, and hateth his brother
Than which profession nothing can be more contradictory, not black and white, or hot and cold in the same degree:

he is a liar;
it is not truth he speaks, it is a contradiction, and a thing impossible:

for he that loveth not his brother whom he hath seen;
his person, which might have drawn out his affection to him; and something valuable and worthy in him, which might have commanded respect; or his wants and distresses, which should have moved his pity and compassion:

how can he love God whom he hath not seen?
it cannot be thought he should; the thing is not reasonable to suppose; it is not possible he should; (See Gill on 1 John 4:12).

Yochanan I 4:20 In-Context

18 Pachad (fear) is not in ahavah, but the ahavah hashleimah casts out pachad, because pachad has to do with pachad of the onesh (punishment) and the one with pachad has not been perfected in ahavah.

19 We have ahavah because rishonah He had ahavah for us.

20 If anyone says I have ahavah for Hashem and the Ach b’Moshiach he hates, he is a shakran (liar). For the one not having ahavah for the Ach b’Moshiach of him whom he has seen, how can he have ahavah for the Elohim whom he has not seen?

21 And this mitzvah we have from Him that the one having ahavah for Hashem should have ahavah also for the Ach b’Moshiach of him.