The Augsburg Confession affirms the ancient and medieval consensus of the catholic Church that Christ’s flesh and blood are substantially present in the Eucharist: “Of the Supper of the Lord they teach that the Body and Blood of Christ are truly present, and are distributed to those who eat the Supper of the Lord; and they reject those that teach otherwise.”1 This avowal of the substantial presence of Christ’s flesh and blood in the Lord’s Supper was integral to the Lutheran Reformation from the beginning. In On the Babylonian Captivity of the Church, Martin Luther criticized the practice of communion in one kind (i.e., the pre-Vatican II Roman Catholic practice of withholding the cup from the laity), transubstantiation, and the idea of the Mass as a sacrifice for the living and the dead. Nevertheless, unlike most other reformers, Luther very clearly confessed the real presence based on canonical and evangelical principles. Since the real presence was overwhelmingly the catholic consensus of the Church from its inception, the catholic principle also applies to this theological question.
Paul’s Affirmation of the Substantial Presence
First, with regard to the canonical principle, the New Testament straight forwardly affirms the substantial presence of Christ in the Lord’s Supper. As Luther tirelessly emphasized, the words of institution themselves (“this is my body . . . this is my blood”) do not admit a metaphorical interpretation. The words of institution are a promise regarding the sacramental elements set before the Christian. Moreover, they are also deed-words that accomplish the consecration so that the bread and wine become vehicles conveying the true body and blood of Jesus to all recipients.
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