1 Corinthians 8:2

And if any man think that he knoweth any thing, he knoweth nothing yet as he ought to know.

And. Greek, 'But;' so 'Aleph (') Delta G f g; but A B, Vulgate, omit it. The absence of the connecting particle gives an emphatic sententiousness suitable to the subject. The first step to knowledge is to know our ignorance. Without love there is only the appearance [ dokei (G1380)] of knowledge.

That he knoweth, [ eidenai (G1492)]. So Vulgate. But 'Aleph (') A B Delta G f read [ egnookenai (G1097)] hath personal experimental acquaintance, not merely knowledge of a fact, which the Greek of the Received Text, and of "we know," or are aware, (1 Corinthians 8:1) means.

As he ought to know - experimentally, in the way of "love."