"Not every one that saith unto me, Lord, Lord, shall enter into the kingdom of heaven; but he that doeth the will of my Father which is in heaven. Many will say to me in that day, Lord, Lord, have we not prophesied in thy name? And in thy name have cast out devils? And in thy name done many wonderful works?
And then will I profess unto them, I never knew you: depart from me, ye that work iniquity." Matthew 7:21-23
Years ago when reading the above text, I skimmed over it thinking I already understood it. However, God told me that I did not really understand and made me read it again.
I thought God was speaking of knowing someone in a worldly sense, i.e. I know Melissa down at the grocery store. Yet, the knowing here is something much more deep and intimate. God is speaking of knowing us as a man knows His wife.