A magistrate regards someone as a criminal...

A magistrate regards someone as a criminal and punishes him if he catches him among thieves, even though the man has never committed anything evil or worthy of death. Christ was not only found among sinners; but of His own free will and by the will of the Father He wanted to be an associate of sinners, having assumed the flesh and blood of those who were sinners and thieves and who were immersed in all sorts of sin. Therefore when the Law found Him among thieves, it condemned and executed him as a thief.

This knowledge of Christ [is a] most delightful comfort, that Christ became a curse for us to set us free from the curse of the Law … Just as Christ is wrapped up in our flesh and blood, so we must wrap Him and know Him to be wrapped up in our sins, our curse, our death, and everything evil.