Via negativa

When the day comes, many will say to me, “Lord, Lord, did we not prophesy in your name, drive out demons in your name, and in your name perform many miracles?” Then I will tell them plainly, “I never knew you. Out of my sight; your deeds are evil!” (Matthew 7:22-23 – REB)

But now that you have come to know God, or rather to be known by God… (Galatians 4:9 – NNAS)

Now I know in part; but then shall I know even as also I am known. (1 Corinthians 13:12 – KJV)

If anyone fancies that he has some kind of knowledge, he does not yet know in the true sense of knowing. But if anyone loves God, he is known by God. (1 Corinthians 8:3 – REB)

What distinction may Jesus and Paul be drawing between knowing and being known?

If I know God, then I may know him no longer.

But if God knows me, then I may know him by his mercy. I have only to let him know me enough to know myself.