how is it definitive that the long form is necessary for transubstantiation?
Exactly. So that means I’m entitled to my opinion that transubstantiation occurs at the words “This is My Body/This is My Blood.” Likewise, you cannot claim that the NO formula is invalid based on the premise that the long form outlined in St. Pius V’s
De Defectibus is necessary as it is not certain. Yet that is your original argument and the root of this debate (see post #58). You will have to find some other premise for your argument that the NO formula is invalid.
Albeit the matter concerning which words of the wine-consecration form are essential cannot be settled conclusively by any theologian, nevertheless one cannot minimize the importance of the opinion of St. Thomas. He is and always has been the one central figure, not only in this dispute, but in all theological questions.
While is true that we must value the theological opinion of St. Thomas, I think you should also remember that he erred on the Immaculate Conception, which was afterwards declared a dogma of the Church (against his theological opinion). “But the Blessed Virgin did indeed contract original sin, but was cleansed therefrom before her birth from the womb.” (Summa Theologica, Part III, Question 27, Article 2)
As alluded to earlier, when we speak of the entire form being necessary for validity, we do not mean that the form of words, exactly as laid down in the Roman Missal, must be used verbatim. This point is so obvious from an examination of the various Oriental liturgies that it hardly needs mentioning.
The Eastern rites are sometimes quite different from the Latin rites. For example, one of the Anaphorae of the Maronite Rite has “for all men.” And I doubt whether all, if any, Eastern Anaphorae have a phrase similar to
Mystery of Faith. That phrase is not contained in any of the Scriptural references to the words of Christ. All the phrases of the formula of the Tridentine Rite have their basis in Scripture but that one (not that everything is contained in Sacred Scripture, but nevertheless I find the absence of that phrase an interesting fact).
Now according to de la Taille some of those who opposed the opinion of St. Thomas labored under a similar misunderstanding, thinking that the Angelic Doctor was insisting that the exact entire form of words used in the Latin Rite is required for validity in an absolute sense, that is to say, universally in all rites. “Suarez, however,” writes de la Taille, “interpreted the mind of the holy Doctor too narrowly, as though St. Thomas meant that the actual words used by the Roman Church are necessary in their actual grammatical tenor, and not merely in this or some other form equivalent in sense. Scotus, however, noted well that equivalence of sense would suffice (4, D. 8, 2; cf. Reportata 4, D. 8, 2).”
Well, according to this, even should the long form be necessary for transubstantiation, the NO formula is sufficiently equivalent in sense to the words discussed by St. Thomas Aquinas. This is especially true if 1) you compare the Eastern rites to the same, and 2) consider the meaning of the phrase
Mystery of Faith based on its grammatical use in the Tridentine formula.
Maria