I The classical roots of Augustineās ontology
In the 1930s a number of European scholars made important contributions to the discovery of Augustineās reliance on Platonist thinkers.1 Ever since then, commentators on Augustineās theology have debated the classical roots of his ontology, and a number of interpretational paradigms remain influential to this day.2 While there are still scholars who think that Augustineās Latin intellect was incapable of grasping the sophistication of Hellenistic thought, Robert OāConnell, one of the most authoritative readers of Augustine in recent decades, has forcefully demonstrated the Latin Fatherās familiarity with Greek metaphysics.3
Regardless of the precise relationship between Augustine and classical philosophy, it is safe to say that at crucial points of his theology he deliberately departs from the ontologies of Plato, Aristotle, Plotinus, and other possible sources of influence (e.g. Porphyry). Even scholars like J. M. Rist who tend to identify basically classical principles operating in Augustineās ontology would never claim that it is simply Platonic, Plotinian, or whatnot.4 Yet it is also true that Augustine takes certain classical philosophical principles to be valid axioms for the development of his theological ontology.
Stephen Menn has helpfully demonstrated that a sound understanding of Augustineās ontology requires a certain degree of familiarity with Platonism. With technical precision, Menn shows that āAugustine was not a Platonistā.5 To be sure, āto a great extentā Augustineās concepts and doctrines of āsoul and Godā are āthe same as Plotinusās concepts and doctrinesā.6 What sets Augustine apart from the Platonists in the first instance is his commitment to āthe authority of Scriptureā in addition to his quest for wisdom from āthe reasonings of the philosophersā.7 This leads to āun-Plotinian aspectsā of the Latin Fatherās ontology that are āas a whole distinctively Augustinianā.8 His starting point was āthe Christian scripturesā, and Platonism only provided him with the ālanguageā and āconceptual apparatusā to explicate āChristian doctrineā.9 Though he tried to do so āpurely in terms ofā Platonist ontology, āthe fit is rough in places, and no Platonist could be pleased to read ⦠that the highest God hadā involved Godself in an act of incarnation.10 In a word, on Mennās overall balanced reading, Augustine is āheavily indebted toā Plotinus, but ācan break from the [Platonist] traditionā because of his ultimate commitment to the authority of the Christian scriptures that he accepts by faith.11
While Mennās work on Augustine is helpful for the most part, his comparative treatment of Platonist and Augustinian theodicies falls short of offering a decisive focus on the key difference between their respective ontologies, namely, Augustineās allegiance to the biblical doctrine of creation. In a more recent article, Yonghua Ge follows Janet Soskice to contend that āultimately it is not Greek philosophy but the biblical doctrine of creatio ex nihilo that serves the foundation for Augustineās metaphysics of beingā.12 Along the same line Bradley Green argues that Augustine changed the definitions of key substantialist terms, including āsubstanceā (Greek: Īæį½Ļία; Latin: substantia/essentia), in order to construct a distinctively Christian ontology in line with the biblical doctrines of the Trinity and creation.13
Gerald Boersmaās 2016 study on Augustineās early theology of image offers an extensive and detailed examination of the Latin philosophical background of his ontology, and discusses the Greek metaphysical roots of the Latin thinkers before him. Boersma argues that in order to speak of both Christ and the human creature as images of the triune God, Augustine redefined the metaphysical concept of substance in his early theology to allow for different manners of participation in the source of the image.14 Boersma, like Menn, takes note of the early Augustineās heavy reliance on Plotinian ontology and the Platonist concept of participation.15 Meanwhile, Boersma contends that the early Augustine is committed to a distinctively biblical-creationist ontology affirming the natural goodness of material substances.16
Of course, how consistently Augustine upholds the biblical principle of creatio ex nihilo to resist dualist theories of substance and basically Platonic understandings of ontological analogies remains a topic of debate in contemporary scholarship. Archie Spencer has shown, in my view quite correctly, that Augustine is largely responsible for having made Platonic patterns of analogical thinking and speech the dominating paradigm for subsequent Latin theology.17 In the same vein I will argue that the basically substantialist approach to theological ontology in the Latin tradition is largely the result of Augustineās overwhelming influence. However, we must also bear in mind that Augustineās ultimate commitment is to the Christian scriptures. He accepts the scriptures in their entirety, while, as Gillian Evans has shown, Plotinusās āEnneads contain a theory of evil which ⦠Augustine rejected as a wholeā even though he āretained many of its partsā.18 Even Rist and OāConnell, who tend to emphasise classical philosophical principles operating in important parts of Augustineās works, would not deny that there is at least an express intention in the Doctor of Grace to uphold his biblical-creationist ontology. That is, we must credit Augustine for having introduced distinctively biblical and Christian ways of thinking to the theological ontology of the Western tradition, however much we might see the tradition handed from him as needful of critical correction.
II Augustineās biblical-creationist ontology of substance
i Creatio ex nihilo and Genesis 1:1ā2
One distinctively Christian feature of Augustineās ontology that sets it apart from classical ontologies in general and Platonism in particular is the doctrine that God created out of absolute nothing everything that is not God. A succinct summary of the doctrine is offered in Augustineās celebrated Enchiridion:
The cause of created things, whether in heaven or on earth, visible or invisible, is nothing other than the goodness of the creator who is the one true God, and that there is nothing that is not either himself or from him, and that he is Trinity, that is, Father, the Son begotten from the Father and the Holy Spirit who proceeds from the same Father, and is one and the same Spirit of Father and Son.19
This distinctively Augustinian doctrine did not come from classical philosophy, but from Augustineās exegesis of Genesis 1. Exegetical soundness aside, creatio ex nihilo is for Augustine a biblically revealed truth that he accepts by faith, rather than a philosophical dogma deduced by reason. Extensive exegetical writings on Genesis 1 are found in at least five major places in the corpus of Augustineās works, which show that his understanding of creatio ex nihilo underwent significant development through different phases of his career. These include, in chronological order, On Genesis: Two Books Against the Manichees; On the Literal Meaning of Genesis: An Unfinished Book; Books 12ā13 of Confessions; On the Literal Meaning of Genesis in Twelve Books; and Books 11ā14 of City of God. Discussions of the role of āunformed matterā in Godās creation of the universe āout of absolute nothingā pervade his other works as well.20
Augustineās earlier works suggest that God created the world out of formless matter that was somehow just there, but in his mature writings he is clear that information occurs at the very instant of original creation. In one initial act of creation, God made both physical and spiritual matter and informed them with Godās eternal Word to give rise to every kind of substance, each endowed with its own nature (Gen. 1:24ā5). Here Augustine departs from Aristotelian hylomorphism and Platonist matterāform dualism in a significant way: matter can be physical as well as psychical, and form is intrinsic to both physical and spiritual matter because information is part and parcel of creation.
How Augustineās understandings of physical and spiritual matter accord with the notion of āheaven and earthā in Genesis 1:1 is a problem that took him some time to figure out. He came to the conclusion that the term refers to the totality of reality consisting of informed matter. The more troubling passage is Genesis 1:2, which mentions the tohuw and bohuw (āformless and voidā), the ādarknessā, and the āface of the deepā. Augustine understands this biblical passage as indicating that God created the orderly world from formless matter. Yet, as we just saw, he insists that matter cannot exist apart from forms. Both spiritual matter and physical matter were informed upon creation, for God created everything goo...