I’ve been thinking on the real presence of the eucharist, and I think I’ve got a way to explain it.
It’s similar to us as humans. We are made of meat, bone, and various other biology stuff. However, we have souls, so we are much more than the sum of our parts. Likewise, the eucharist is bread and wine, but has the real presence, and thus has much more. God is sort of ‘the soul’ of the eucharist, if that makes sense.
Am I close?
I think there is a sense in which belief in the RP is dependent on a certain kind of dualism with regard to all matter, not just people. Whether one half of the dual partnership ceases to exist and gets replaced is a matter for Catholics to clarify. I think it’s an ok way to explain it.
I think a couple of other things about it too, though. First, that this dualistic concept did not exist when Jesus instituted a remembrance of Him at the Last Supper, so His disciples certainly did not understand His words in this way. And second, this dualistic notion as applied to all matter was only taken seriously until…well, different people stopped taking it seriously at different times. Let’s just say it’s a little easier to defend in an era when earth, fire, wind, and water are taken seriously as “the four elements.” Or when various “humours” were believed to flow through people’s bodies and determine some aspect of their personalities. Our knowledge of matter, of substance, and of being have all changed since then, and one of the casualties was the dualistic nature of all matter. Philosophically and scientifically, it is now indefensible and that’s not ever going to change. At one and the same time, it is indispensable to the doctrine of transubstantiation. But probably not the RP as a whole.
Your side-by-side comparison of a dualistic philosophy of mind with a dualistic philosophy of matter is useful, but it also constitutes a fairly direct path to criticism of either philosophy. Of the two, “matter dualism” is the one you really don’t want to try and defend. You shouldn’t plan on even making an attempt- this is more of an occasion for an escape. The typical play here is to claim that you don’t have to defend it. Talk about how the CCC and official Church documents don’t use the word “accident.” That kind of thing. Distance yourself from it.
(Useful reference point: TPAM, right there at the end. That’s how you do it).
Cartesian dualism as a philosophy of mind continues to enjoy fairly widespread acceptance outside of academia, but that’s already changed within it. They’re just working on different ideas that can replace his and have the same kind of staying power. Some of them are really interesting- you should look into it.
Basically, you described two different philosophies of dualism that are similar in many ways and different in others. One of the differences is that one has nothing in the way of intellectual currency while the other isn’t quite there yet, but it’s well on its way out.