[Part I can be accessed here].
For Zwingli, because Christ is now seated at the right hand of the Father, he therefore cannot be real-ly present in the Eucharist. Zwingli’s starting point, in contrast with Thomas’s (and we all have starting points) is that “the presence of a thing in a sign excludes its being present as ‘real’ [i.e. real for Zwingli seems to be synonymous with local bodily presence]” (p. 67). As Zwingli himself states, “the very body of Christ is the body which is seated at the right hand of God, and the sacrament of his body is the bread and the sacrament of his blood is the wine … Now the sign and the thing signified cannot be one and the same. Therefore the sacrament of the body of Christ cannot be the body itself” [On the Lord's Supper, in Zwingli and Bullinger, SCM Press, p. 188, as quoted in Turner, p. 67]. Put simply, according to Zwingli, the material absence of Christ’s body localiter necessarily excludes Christ’s real presence in the body. Thomas, however, though agreeing with Zwingli that Christ’s bodily presence is not localiter, does not draw Zwingli’s conclusion. As Turner notes, “the presence of Christ in the Eucharist is the real presence of Christ’s body,” but this real presence requires “an absence which is eschatological” (p. 67). Turner then ends this section with the passage below, which I quote in full because it was the section that I had the most difficulty understanding.
[W]hat the Eucharist ‘realises’ is a bodily presence which is not yet, a real absence, a body making really present that of which, as yet, we cannot take possession. For Christ’s body is raised, and our bodies are not. Hence, if we cannot, in the fallen condition of our bodiliness, enter fully into communication with the presence of the absent, because raised, person of Jesus, then neither can we enter fully into communication with that absence. For just as we cannot yet know that kingdom which one day we shall see and fully enjoy, so neither can we have any grasp of how far we fall short of communicating with it. We fail even in our calculation of the degree to which our Eucharistic communication fails. Hence, if there is a problem about how Christ is present in the Eucharistic sign there must equally be a problem of accounting for how that absence is present within it; and that problem is not to be resolved on any account of the nature of signs, but only on some account of the relationship between the apophatic and the cataphatic, that relationship being itself defined only under the constraint of the eschatological. If, therefore, we ask: ‘How is Christ present in the Eucharist?’ Thomas’s answer is: ‘Really, as bodies are present to one another.’ And if you ask: ‘How is Christ’s body present?’ Thomas’s answer is: ‘Sacramentally’, that is, ‘eschatologically’, as the raised body of Jesus can be present to us in our pre-mortem condition as unraised. And that is a mode of ‘real absence’ as much as it is a mode of ‘real presence’. For such is the nature of a sacrament (p. 67).
If I understand Turner correctly, he seems to be saying that to be eschatologically, bodily present in the Eucharist is to be sacramentally present in the Eucharist. Thus, the idea is that the real presence of Christ is a bodily presence that obtains under a sacramental sign (bread and wine). Contra Zwingli, Thomas claims that sign-presence is both real-presence and bodily presence. If sign- presence is real-presence, then we are necessarily involved in real-absence. With regard to the Eucharist, what is really absent is the local presence of Christ’s body. Given our un-glorified state in this life, we cannot grasp how a body can be genuinely (real-ly) present without simultaneously being locally present, we are unable to, as Turner says, fully “communicate” with the kind of bodily-presence-beyond-local-presence that constitutes Christ’s Eucharistic (bodily) presence. Once we possess our glorified bodies, we will be able to partake fully of Christ’s glorified body; however, until then, our partaking is not a complete partaking but neither is its reality cancelled. It is an already-not-yet partaking that involves a presence/absence dialectic, and consequently, necessitates a catophatic/apophatic dialectic. This already-not-yet sacramental presence assures us of a more full presence and partaking of Christ that has been promised us in our glorified state. This sacramental presence is as my friend and colleague, Derek, says, “a promise of the presence to come, signifying it and partially bringing it to pass in the present (i.e. it is an effectual sign, not merely signifying what it signs, but also effecting what it signifies”).[1]
Lastly, I found Turner’s summary of Zwingli’s position fair and accurate (in so far as my knowledge of Zwingli goes); however, his criticisms of course do not apply in toto to other Protestant Eucharistic theologies (e.g., real presence as understood by those within the Anglican tradition, Calvin, Luther, Peter Martyr Vermigli). It seems to me that at the end of the day, Thomas is saying with regard to the how Christ is bodily present (and absent) that it is a mystery that cannot be explained (which is not a criticism of Thomas on my part-Calvin would heartily agree).[2] Moreover, Calvin and Vermigli also emphasize the real presence of Christ, as well as a mysterious partaking of Christ’s body and blood in the Eucharist. For example, after speaking of our need for communion with Christ’s flesh and blood in order to “aspire to the heavenly life,”
Calvin then adds,
[t]his could not be, did not Christ truly form one with us, and refresh us by the eating of his flesh, and the drinking of his blood. But though it seems an incredible thing that the flesh of Christ, while at such a distance from us in respect of place, should be food to us, let us remember how far the secret virtue of the Holy Spirit surpasses all our conceptions, and how foolish it is to wish to measure its immensity by our feeble capacity. Therefore, what our mind does not comprehend let faith conceive, viz., that the Spirit truly unites things separated by space. That sacred communion of flesh and blood by which Christ transfuses his life into us, just as if it penetrated our bones and marrow, he testifies and seals in the Supper, and that not by presenting a vain or empty sign, but by there exerting an efficacy of the Spirit by which he fulfils what he promises (Instit. IV.17.10).
Notes
[1] A huge thanks to Derek for a helpful dialogue on this particular section of Turner’s presentation.
[2] “I am not satisfied with the view of those who, while acknowledging that we have some kind of communion with Christ, only make us partakers of the Spirit, omitting all mention of flesh and blood. As if it were said to no purpose at all, that his flesh is meat indeed, and his blood is drink indeed; that we have no life unless we eat that flesh and drink that blood; and so forth. Therefore, if it is evident that full communion with Christ goes beyond their description, which is too confined, I will attempt briefly to show how far it extends, before proceeding to speak of the contrary vice of excess. [...] if, indeed, it be lawful to put this great mystery into words, a mystery which I feel, and therefore freely confess that I am unable to comprehend with my mind, so far am I from wishing any one to measure its sublimity by my feeble capacity. Nay, I rather exhort my readers not to confine their apprehension within those too narrow limits, but to attempt to rise much higher than I can guide them. For whenever this subject is considered, after I have done my utmost, I feel that I have spoken far beneath its dignity. And though the mind is more powerful in thought than the tongue in expression, it too is overcome and overwhelmed by the magnitude of the subject. All then that remains is to break forth in admiration of the mystery, which it is plain that the mind is inadequate to comprehends or the tongue to express. I will, however, give a summary of my view as I best can, not doubting its truth, and therefore trusting that it will not be disapproved by pious breasts” (Inst. IV.17.7).

