I've been thinking some more about this little debate between Henry and Scotus on the divine essence as a substratum for the persons. Here are some of my (rough) abstract thoughts on the matter. Maybe later I'll clean this up if I get a chance.
In book 7 of
De Trinitate, Augustine ponders two ways to explain how the divine essence is common to all three divine persons: as a shared genus or species, as for example if three people shared one form of humanity, or as a common material or substratum, as for example if three statues were made from the same lump of gold. I will call the first of these views the 'generic view', and the second the 'substratum view'.
One might wonder if it really makes much difference which of these we choose. After all, on both views, the divine essence is just something shared by the three divine persons, so the relations of identity and distinction work out in more or less the same way. It doesn't matter much whether we say the divine essence is a common 'form' or a common 'substratum', because either way, the divine essence is common to all three persons.
Here I will try to show that there is one reason why it might make a difference which of these views we choose. Although the identity and distinction relations work out in more or less the same way for each of these views, when we consider how the Father produces the Son, the generic and substratum views have to part ways. And then, as I will argue below, it turns out that the substratum view (but not the generic view) pressures us to say that the divine essence belongs
more to the Father than to the Son, and that sounds a lot like subordinationism.
1. The generic and substratum viewsThere are many ways to compare and contrast the generic and substratum views, but for our purposes, I would like to think of this in terms of
instantiation. From this angle, the difference between the generic and substratum views is that on the generic view, the divine persons instantiate the divine essence, while on the substratum view, the divine essence instantiates the divine persons. I will say more about this in a moment, but first I want to explain what I mean by 'instantiation'.
Instantiation, as I understand it here, is a technical way of talking about 'where' properties occur. The idea is that properties don't just float around, detached from objects. They occur in objects. The property
being red, for example, is not just a free-floating patch of color. Rather, it occurs in particular objects such as walls and fast cars. These objects are 'where' the property
being red occurs. In the technical jargon, each occurrence of the property
being red is an
instance of being red, and the object where a property instance occurs is said
to instantiate the property (or, to use the passive tense, the property is instantiated by the object). So when I say that some
x instantiates
F, I mean that the property
F occurs in the object
x.
This description of instantiation might seem a little vague, and it is, deliberately so. The reason is that I don't intend it to depend very much on particular ontological commitments. Instantiated properties can be described in a variety of ways, e.g., they can be tropes, immanent universals, qualities, and so forth, but we can still talk about these in terms of instantiation. The same goes for the objects which instantiate properties. These can also be understood in various ways – as bundles of tropes or properties, an independent substance, a substratum, and so forth – and we can still talk about this in terms of instantiation.
To maintain the serviceability of instantiation, all we need to do is meet two conditions. First, for any
x that instantiates
F and any
y that does not instantiate
F,
F is ontologically connected to
x but not to
y. If we consider a red wall and a green water tower, the color red is ontologically connected to the wall in a way it is not connected to the water tower. This 'ontological connection' can be construed in many ways, but however we explain it, we need to maintain that the color red is ontologically connected to the wall rather than the water tower
Second, if some
x instantiates
F, then
F does not instantiate
x. In other words, the relation must be
asymmetric. The color red comes to exist in walls and fast cars, but fast cars and walls do not come to exist in the color red. Again, there are many ways to explain how or why the ontological connection of objects and their properties is asymmetric, but so long as we can maintain that walls instantiate the color red and not the other way around, the notion of instantiation is serviceable. (If we deny the asymmetry of
x and
F, then the substratum and generic views are not different at all, because the divine essence is just the overlap of the three persons.)
So how does this apply to the trinity? As I said at the beginning of this section, on the substratum view, the divine essence instantiates the divine persons. Thus, the divine essence is 'where', as it were, the divine persons occur, so we end up with one object which instantiates three persons. To borrow from Augustine's analogy, if you can imagine three statues occurring simultaneously in the same lump of gold, you have a good idea of the substratum view.
The generic view, on the other hand, maintains the opposite position: the divine persons instantiate the divine essence. Thus, the divine persons are 'where', as it were, the divine essence occurs, so we end up with three objects that instantiate (we could also use the word 'exemplify' here to mean the same thing) one divine essence. If you can imagine a single statue occurring simultaneously in three lumps of clay (perhaps in the way that a polyadic property might occur simultaneously in multiple objects), you have a fair picture of the generic view.
As I suggested early on, it may not seem like there is any significant difference between the substratum and generic views. Indeed, on both views, the divine essence plays the role of something common to all three. It is just the 'overlap' of the persons. Whether we say that this 'overlap' occurs because the divine essence instantiates the persons or because the persons instantiate the divine essence, the identity and distinction relations turn out to be exactly the same. However, in the next section I will argue that although this is true for the identity and distinction relations, when we consider how these two views explain the production of the Son, the substratum and generic views have to part ways.
2. The production of the SonThus far I have suggested that we can define the generic and substratum views in terms of instantiation: on the generic view, the divine persons instantiate the divine essence, while on the substratum view, the divine essence instantiates the persons. Each of these views entails a different statement about how the divine essence is included in a divine person.
On the generic view, the divine essence is instantiated by the divine persons. Putting it this way might make it sound like we can
first have a divine person which
then instantiates the divine essence, and thus there is the possibility that a divine person could exist without instantiating the divine essence. But this needn't by the case. We could insist that a divine person cannot fail to instantiate the divine essence, just as a human cannot fail to instantiate the property
being human. Thus, on the generic view, some
x is a divine person only when it instantiates the divine essence.
On the substratum view, things are reversed: a divine person is instantiated by the divine essence. Again, although putting it this way might make it sound like the divine essence could exist without exemplifying a person, this needn't be the case. We could insist that the divine essence cannot fail to instantiate at least one divine person, just as some clay cannot fail to instantiate at least one lump. Thus, on the substratum view, the divine essence is a divine person only when it instantiates a person, just as a lump of clay is only a statue when it instantiates a statue.
These two different conceptions of what makes a person determines how we explain the production of the Son. On the generic view, some x is a divine person only when it instantiates the divine essence, so producing the Son entails that however we explain the inner machinery of production, the end result must be that the Father causes some
x (the Son) to instantiate the divine essence. On the substratum view, the divine essence is a person only when it instantiates a person, so producing another person entails that however we explain the inner machinery of production, the end result must be that the Father causes the divine essence to instantiate a person. In short, on the generic view, the Father must cause the divine essence to come to exist in the Son, while on the substratum view, the Father must cause the Son to come to exist in the divine essence.
It is at this point that we start to encounter the difference between the substratum and generic views, but to arrive at a clear picture of this, we need to consider the causal relations entailed by production. Of course, there are many different causal relations that we could discuss here. For example, we could talk about how a stone falling is causally related to the physical forces that act upon the stone, or how the fire that burned down the neighbor's house was causally related to the circumstances leading to the fire.
But these are not the sort of causal relations that make a difference for the production of the Son. The reason is that when the Father produces the Son, there is nothing there to cause the Son except the Father. The Father must therefore be the sole and sufficient causal source for the Son. No matter how we construe the Father's causal or productive role in producing the Son, the end result will therefore be that the Son is directly emitted or elicited – produced – from the Father. The Son will come 'out of', if you will, the Father. There is nowhere else the Son could come from.
Thus, when we say that the Son is produced from the Father, this produced-from relation must have the sense of 'coming directly from'. The Son will not be related to any causal source other than the Father. There is not an external artisan who shapes the Son out of the Father, there is no physical force that causes the Son to spring forth from the Father, nor is there anything else. The Son comes from the Father, plain and simple.
But here is where the generic and substratum views start to part ways. On the generic view, the Son is produced from the Father but not from the divine essence, while on the substratum view, it's hard to see how the Son could fail to be produced from the divine essence. On the substratum view, the Son is produced from the Father, but the divine essence just is
the substance of the Father. The divine essence just is that object 'where' the Father occurs. If the Son comes from the Father in the sense that the Son directly issues forth from the Father, then surely the Son comes from that object 'where' the Father occurs, namely the divine essence. It would be odd to think that the Son issued forth from the Father, but not from the object where the Father is instantiated.
Consider a clay statue. Suppose that, perhaps in some other worldly dimension, clay statues can produce products in such a way that the products directly issue forth from the producing statues. In this scenario, it's hard to see how such a product could fail to be produced from the clay. If the clay just is the substance of the statue, the object 'where' the statue occurs, then surely the product will issue forth from the clay. It would be odd to think that such a product would issue forth from the statue, but not from the clay where the statue is instantiated.
On the generic view, however, the Son does not come from the divine essence in this way. Rather, the Son directly issues forth from the Father. Of course, on the generic view, the Father instantiates the divine essence, so the Father is 'where' the divine essence occurs, but nothing turns on this. Consider the clay statue again. A product issuing forth from a clay statue would come from the clay in which the statue is instantiated. It would be odd to think the product came from the statue but not from the clay where the statue is instantiated.
As it turns out then, the substratum and generic views begin to part ways when we consider where the Son issues forth from for each of these views. On the substratum view, the Son would issue forth directly from the divine essence, while on the generic view, the Son would issue forth directly from the Father. In the next section, I will argue that this particular difference pressures the substratum view to distance itself even further from the generic view.
3. The substratum view and the divine essenceSaying that the Son comes from the divine essence pressures the substratum view to say that the divine essence belongs
more to the Father than it does to the Son. Otherwise, it turns out that the Son is produced from himself. The idea here is that if the divine essence is
equally the object which instantiates each divine person, then it follows that the Son is produced from the object which instantiates himself. And since the Son just is that object (in which the Son is instantiated), the Son is produced from himself, and that's circular. Let me try to explain this with some analogies.
Imagine if you and I jointly owned a lump of gold which we then cast into a statue. If someone asked what the statue was produced from, I couldn't say it was produced only from my gold, because it's just as much your gold as it is my gold. The statue would be produced from the gold that belongs to each of us. In order to say the statue was produced from my gold, the gold would have to belong
more to me than to you.
Or, to use an example closer to the divine case, imagine a possible world where the only material is clay, and the only way such clay can be arranged is statue-wise (in such a world, any bit of clay is a lump and a statue). If you pointed to one of these statues and asked me what it was produced from, I couldn't say it was produced from the lump's clay any more than the statue's clay, since the clay is equally the lump's and the statue's. In order to say the statue was produced from the lump's clay, the clay would have to belong
more to the lump than to the statue.
Similarly, if the divine essence is
equally the substance of each divine person in the sense that it is the object which instantiates each divine person equally, then we cannot say the Son is produced from the
Father's substance, because the divine essence is just as much the Son's substance as it is the Father's. To put this another way, whenever it is true that the divine essence is the substance of the Father, it is also true that the divine essence is the substance of the Son. Consequently, whenever it is true that Son is produced from the Father's substance, it is also true that the Son is produced from his own substance. The only way the Son could be produced from the Father's substance (and not his own substance), is if the divine essence belongs
more to the Father than to the Son and/or Spirit.
The conclusion here is that if we want to say that the divine essence is
equally the substance of each divine person, then we have to accept the circular consequence that the Son is produced from the substance of each divine person (and thus, in part from himself). In order to avoid this problem, we are pressured to say the divine essence belongs in some way
more to the Father than it does to the Son. Only then will it follow that the Son is produced from the
Father's substance rather than from his own.
But if we do that, it seems we end up with a text book case of subordinationism. If the divine essence belongs more to the Father than to the Son and Spirit, then it obviously follows that the Son and Spirit possess the divine essence in a way
less than the Father does. Since the Son and Spirit are therefore less than the Father (in whatever way we define 'belonging less to' here), it's hard to see how this sort of thing would not be a case of subordinating the Son and Spirit to the Father. If we hold to the substratum view, we would therefore want to find a way to explain how the divine essence could belong more to the Father than to the Son in such a way that did not amount to subordinationism.