1 Corinthians 8:3

But if any man love God, the same is known of him Cf. 1 John 4:7-8. But it is observable that St Paul, dealing with inquisitive and argumentative people like the Corinthians and Galatians, takes care to invert the phrase, so as to exclude all glorying on the part of man. In Galatians 4:9 he corrects himself when speaking of knowing God, and in this Epistle, written afterwards, he seems carefully to avoid the expression, and to speak, both here and in ch. 1 Corinthians 13:12, rather of being known by God; So in St John 6:37; John 6:44-45; John 6:65, the same doctrine is taught by Christ Himself. "The knowledge of God presupposes the being known of Him: the soul will not vivify with life from above until God has drawn nigh." Olshausen.