Aquinas, the Divine Nature
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Aquinas, The Divine Nature So far we have shown THAT God exists, but we don’t yet know WHAT God is like. Here, Aquinas demonstrates attributes of God, who is: (1) Simple (i.e., God has no parts) (2) Perfect (i.e., God has all of the perfections; e.g., goodness, wisdom, power) (3) Infinite (i.e., God is not limited in any way) (4) Ubiquitous (i.e., God exists in all places) (5) Immutable (i.e., God does not change) (6) Eternal (i.e., God is timeless) (7) One (i.e., there is only one God, one entity with all of these attributes) 1. Simplicity: Everything that you and I have ever seen is composed; that is, has parts. But, God is not like that. He is “simple”. His summary of the best arguments for this come in Article 7, but he makes a couple of points worth noting along the way: God is Immaterial: First, God cannot be a “body”. Aquinas has already shown (in the 1st Way) that God is the First Mover, Unmoved. But, any body that is the source of the motion in another body must itself move. God’s Essence is Existence: Second, Aquinas has already shown (in the 3rd) way, that God is a necessary being. But—if you recall from our study of Avicenna—that is the sort of being whose existence is GUARANTEED by its own essence. I said this in my notes: A triangle’s essence does not guarantee its existence. Just by considering the essence of a triangle, we see that it needs a cause in order to exist. It needs existence to be ADDED TO its essence in order to exist in actuality. On the other hand, recall that positing the non-existence of a necessary being results in a contradiction. So, a necessary being would be one whose essence is such that it DOES guarantee its own existence. It doesn’t need existence ADDED to its essence in order to exist because its essence IS existence. Any being with THAT sort of essence simply MUST exist. For, what it is is pure existence. In short, God is not composed of essence PLUS existence, since His essence IS existence. The Proof of God’s Simplicity: Aquinas’s most straightforward reasons are these: (1) Wholes (i.e., composite things) are dependent upon their parts; and parts are (at least logically, if not also causally) prior to the whole. But, God depends on nothing, and nothing is prior to God. 1 (2) Composites are potentially dissoluble (i.e., capable of not existing); since the parts can be separated from one another so that the whole ceases to exist. So, any composite is capable of not existing (i.e., is a contingent being). But, God is not capable of not existing (He is a Necessary Existent). (3) Every composite requires a composer—that is, an efficient cause which brings the parts together into one whole. But, God has no cause (He is the First Cause). 2. Perfection: Aquinas argues that God is absolutely perfect. To understand his main reason for thinking this, it is important to note that Aquinas endorses the Augustinian view that existence, or being—insofar as it is being—is good. Furthermore, imperfection (e.g., evil) is a PRIVATION of being. In short, the more existence a thing has, the more perfect it is. But, God’s essence IS existence. As such, God is pure being. His being lacks nothing. It is without privation. So, He is absolutely perfect. He says that “God is self-subsisting existence. It follows from this that God contains the complete perfection of existing in himself.” (I.4.2) The second argument given is this: Clearly, there are perfections that created things can have (e.g., goodness, wisdom, being, life, and so on). But, Aquinas believes that a cause cannot impart these attributes to its effect unless it itself has them, and in a more perfect way. (For example, the sand on a beach gets hot. The cause of this effect is the Sun, which possesses heat to a much greater degree.) He writes, “it is obvious that an effect preexists in the power of the acting cause. But to preexist in the power of the acting cause is not to preexist in an imperfect mode but rather in a more perfect mode. … Thus since God is the first efficient cause of things, it follows that the perfections of all things preexist in God in a more eminent way.” (I.4.2) Conclusion: Aquinas infers from God’s absolute perfection that He therefore possesses ALL of the perfections—e.g., goodness, wisdom, and life. He writes, “insofar as something is perfect it is also said to be good.” (I.4) And later, “the very existence of God includes in itself life and wisdom, since no perfection of existing can be lacking to what is subsisting existence itself.” (I.4.2) 3. Infinity: By ‘infinite’ Aquinas means ‘not limited’. To understand why Aquinas thinks that God is not limited in any way, it will be helpful to discuss the Aristotelian view (which Aquinas endorses) regarding matter and form. 2 When we discussed the Four Causes, we saw that the efficient cause is responsible for bringing together the matter (the material cause) and the form (the formal cause). Thus, each material being is composed of matter + form. For instance, a statue is composed of the slab of marble (matter) and that particular statue-shape (form). Matter: In their own way, both matter and form suffer some limitations. It may seem like matter is NOT limited because it can become ANYTHING! With a pile of protons, neutrons, and electrons, you could make a table, or a dog, or a star! Ultimately, however, Aquinas says matter is limited because it cannot exist independent of form. There is no such thing as formless matter.* So, wherever matter exists, it is limited by form to be THIS SORT of thing, rather than some other. For instance, the matter in Fido is limited by the form of ‘dog’ to be a dog, rather than, say, a cat or a table. ( * Though Aristotelians often spoke of matter without form—they called it “Prime Matter”—they did not think that Prime Matter actually existed somewhere in the universe. Matter can only exist if it has a form.) Forms: Forms are weird. They can exist simultaneously in many places at once. For instance, a particular statue-shape can exist in many slabs of marble at once. Similarly, YOUR form (the form of human being) exists in many places at once—namely, in each and every human being. So, in a sense, forms are NOT limited (to any particular matter). Interestingly, the implication is that matter is what individuates things. If I say that two statues are “identical”, you might reply: “Well, they’re not REALLY identical. They just LOOK the same. But, they’re composed of different matter.” What’s been said here is that the 2 statues share one and the same FORM, but not one and the same MATTER— and for this reason, they are not the same statue. Similarly, Fido and Sparky share one and the same form (the form of ‘dog’), but not the same matter. That is why they are two numerically distinct dogs rather than one dog. But, now we see that, in some sense, form is limited too. Though a single form can be in many places at once, wherever it exists, it exists in some matter than makes it be THIS individual rather than THAT individual. For instance, in Fido, the form of ‘dog’ is limited by the matter which makes it be Fido (and not Sparky). In Sparky, the same form is limited by the matter which makes it be Sparky (and not Fido). Aquinas writes, “Now in one way matter is limited by form, and in another way form by matter. Matter is limited by form insofar as matter, prior to receiving form, is in potentiality to many forms; once it receives a form, however, it becomes limited by that one form. Form is limited by matter insofar as form, considered in itself, is common to many; once it is received in matter, however, it becomes the determinate form of this thing.” (I.7.1) 3 Thus, while forms may be “universal” in the sense that they can exist in many things, they are always restricted by (or limited by, or contracted into) matter to become “particular” things. God: But, God is not composed of matter and form, as we have seen. Rather, God is the CAUSE or SOURCE of all matter and form. Thus, He does not suffer from either of their limitations. Furthermore, unlike contingent beings (whose existence is limites), God is a necessary being. As such, His existence is not limited (e.g., He doesn’t begin or cease to be). Furthermore, as a necessary being, God’s essence IS existence. For all other things that exist, they exist in some particular (restricted) way that is specified by their essence, or nature. For instance, any dog that exists, exists in only some restricted way (namely, as a DOG, and NOT, say, a CAT). But, since God’s essence just IS existence, His existence is not restricted or limited in any particular way. God is PURE EXISTENCE. Thomas writes, “Now, as was made clear above [I.4.1.R3], what is most formal of all is existence itself. Therefore, since the divine existence is not received in anything, but is itself its own subsisting existence, as proven above [I.3.4], it is clear that God is infinite and perfect.” (I.7.1) In other words, existence is typically RECEIVED by (or added to) some matter and form.