Christ Our Representative Head

How does this section depict Christ as the Head of His chosen sinners? How do we see representation in all parts of life? Who are the two representative heads in Scripture? Who are the wicked that are spoken of here? What is the significance of the LORD Jesus Christ 'tasting' death? When did we become enemies of God? Why is sin described in so many ways in Scripture? How does a lie make one unfaithful? Why do people continue to cover themselves with the 'fig leaves' of false religion?