But do I understand you to say though that the, “situation of ‘impossible’” would never apply to the species used?
For instance, I could easily see an “impossible” situation where a priest would might have nothing but bread and wine of “unknown” composition and “provenance”. Would he be forbidden from using these regardless of dire circumstances and the needs of the flock?
Peace
James
Even in a situation of “impossible” anything that goes to validity still has to be followed.
In a case like that, it could come down to exactly what the priest has available. Since we’re discussing hypotheticals here, it’s just not possible for us to describe or even imagine all the potential situations.
The wine is (believe it or not) easier to deal with than the bread. The vast majority of good quality wines would be valid matter, after we’ve eliminated the obvious ones like those labeled blueberry, cherry, etc, or sangria, or which otherwise state on the label that something has been added. If a priest is in a true emergency (or similar) situation and has access to a selection of wines, chances are that he would be able to pick one that would be valid matter. Most good quality wines already meet the standards for valid matter.
Breads though are a different story because most breads available on the shelf would not be (at least in my estimation) valid matter. This topic comes up often, and I’ve sometimes looked at the ingredients in different types of breads available in the store. The list of ingredients is so long that I would never even consider using them for Mass, no matter how dire the situation. If faced with that situation, I’d sooner get some wheat flour and bake my own.
If anything, pita bread made by a local bakery would be the best option. These are often made with only wheat, flour, yeast, and perhaps a little salt. But I would not use any from a commercial bakery (the national brands that we see in grocery stores). The problem here though is that because these cater to special markets, they’re not available everywhere.
The heart of the issue here is that unless the bread and wine are valid matter, there is no Eucharist. That’s what we have to keep in mind. If a priest uses bread that is not valid matter, no matter how much of an emergency it might be, he isn’t consecrating the Eucharist; it’s much worse to have a simulation of the Eucharist than it is to have no Eucharist at all. What I’m saying here is that it’s not an issue of “forbidden” as such, it’s an issue of whether or not the Eucharist is actually consecrated.