The Two Natures in Christ "Christ Present in the Church According to Both Natures" (Witness and seal of the Lord's Supper)--Martin Chemnitz

"For in the action of the Lord's Supper there is a public, solemn, and peculiar witness and seal that Christ, our Mediator and Savior, wills to be graciously present with His church in its struggle here on earth, not with only one portion and part of Himself, that is, with only His deity, but wholly and completely, that is, with His assumed nature also, by which He is of the same substance with and related to us, our Brother. For in this nature He was tempted, so that He could share in our wretchedness; in this nature He accomplished by His suffering and death the work of our redemption, so that we thus might be made members of His body, of His blood, and of His bones. Because our reason and sense do not understand or comprehend this, therefore Paul says, 'Great is this mystery in Christ and in His church.' (Eph. 5:32)"