Jesus said, "Get away from me, you people who do wrong. I never knew you."*

When someone sins, does wrong, that person changes their original purpose and character.  

The sinner, a person who does wrong, is unrecognizable from the person he or she began as a child and not the person the Lord meant for them to be.  

Therefore, the person doing wrong, the sinner, will also never know his or her real self.  

Ironic because the sinner is all about themselves, always me, me, me, but in selfish desires and insatiable sins, such as lust and greed, and is therefore, detached from their real self and attached to sins where there is no me.

For instance, the sinner will also see the world only through the eyes of sin (greed will only see $ dollar signs, the object of their greed; hater will only see hate, the object of their hate).

The wall built behind sins cannot be attached to anything or anyone in reality, including themselves (idolized versions), because everything becomes objectified through sin.

Jesus said, "I never knew you", because the sinner does not know himself (or sold out himself to sin or gave into selfish desires in harm);

Whatever the reason, the sinner is no longer attached to the person of oneself, but to sins, so there is no me in them anymore.

The only relationship the sinner has is with sin.

*Matthew 7:23, Bible Gateway Easy-to-read version