“… the divine nature of Christ is not the medium through which His human nature communicates itself to us and joins us to Him, but as we have pointed out by the quotations form the Fathers, since our nature through sin has been separated and alienated from grace, life, and salvation which are in the divine nature, so that it can no longer endure the bare Deity that deals with it in divine judgment any more than straw can endure a consuming fire.  Therefore, the Son of God as our Mediator took upon Himself by the personal union a nature which is akin to ours and of the same substance with us except for sin; so that the Deity with and through the nature, whereby He is our Brother, not only merited salvation for us but also dealt with us and communicated to us the divine blessings of salvation.  And since the weakness of our faith, which is weighed down with the burden of the flesh, cannot in this life rise to the arcane places of heaven or shed light upon them, Christ Himself comes to us, is wholly present with His church, and joins Himself as Head with His members, who are struggling here on earth.  And He does this in, with, and through this nature by which He is our Brother, akin to us, and of the same substance with us.  In this way He leads us to communion and fellowship with the divine nature.”

Chemnitz, Martin. The Two Natures in Christ. Trans. J.A.O Preus. 2007, St. Louis: Concordia Publishing House, pg. 472.