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; 1 John 4:12.