1 John 4:8 New English Translation

⁸The person who does not love does not know God, because God is love.^[a]

1 John 4:8 tn The author proclaims in 4:8 ὁ θεὸς ἀγάπη ἐστίν (ho theos agapē estin), but from a grammatical standpoint this is not a proposition in which subject and predicate nominative are interchangeable (“God is love” does not equal “love is God”). The predicate noun is anarthrous, as it is in two other Johannine formulas describing God, “God is light” in 1 John 1:5 and “God is Spirit” in John 4:24. The anarthrous predicate suggests a qualitative force, not a mere abstraction, so that a quality of God’s character is what is described here.

New English Translation (NET)