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Alindawyl
Guest
Good point. Take, for example, a chair. If someone points to a chair and says “What is the substance of this thing?” then because of the culture in which we’ve been raised we’re conditioned to respond with a purely materialist answer. We would quite naturally say “wood” or “metal” or “plastic” or some combination thereof. We would want to equate the chair’s substance with the matter that comprises it.RT,
Leaving aside the Eucharistic change for a moment, don’t you run into the same problem if you take a purely physicalist or materialist point of view?
I mean, you mentioned the modern understanding of the world . . . I am unsure what you mean by that exactly, but my guess would be, say, atoms make up things.
But, what makes up atoms?
VC
But substance is a universal. The substance of “chair” is what makes a chair a chair instead of anything else, like a potted plant, or a haircut, or a motivational speech. The matter of any particular chair is particular to that chair, but not universal to all chairs. If we say the substance of a chair is wood, then what do we do when someone shows us a metal folding chair? If we say the substance of a chair is metal, what do we do when someone shows us a purely wood kitchen chair? Even though the matter is different, there is something about a chair that makes it a chair regardless of its matter. The matter used to make a particular chair is therefore not essential for a chair, in general, to be a chair. The only universal when it comes to chairs and matter is that chairs are material.
Even what we might think of as essential with regard to the appearance of a chair is not necessarily essential. Fold up a metal or plastic folding chair, ask someone what it is, and they will still say “a chair”. Chairs don’t even have to have multiple legs (a stool), or legs at all (it could have two solid rectangles of material in lieu of legs). They don’t even need to sit still or flat (rocking chair) to be a chair. No matter how common something might be in chairs, unless it’s essential it’s an accident, not substance.
The substance of a chair is, at its most basic, a piece of furniture containing a raised surface designed with the purpose of being sat upon, usually by a single person. It’s a universal and can’t be described in materialist terms. We shouldn’t have any trouble with that, but in our modern, materialist, nominalist culture, we seem to have a great deal of trouble with universals. Even if we don’t think that we’re a materialist, we almost unconsciously expect substance to be something that can be described in a purely physical manner. Getting around that mental block from our cultural upbringing is necessary in order to understand what is meant by substance in this context.