Medieval Synthesis: Augustine, Aquinas, Scotus, Ockham, and the Problem of Universals: Fourth Lecture on Western Philosophy for Indian Students

Medieval Synthesis: Augustine, Aquinas, and the Problem of Universals (haecceity, esse/essentia distinction, analogia entis, scotistic formalism)

Fourth Lecture

by

Tanmoy Bhattacharyya

The Latin Middle Ages did not merely “preserve” Greek philosophy; it performed the most audacious metaphysical transposition in history. Greek οὐσία became Latin esse; Greek νοῦς became intellectus agens and lumen gloriae; Platonic methexis and Aristotelian energeia were fused into a single doctrine of participatio essendi; and the God of Exodus 3:14 (“Ego sum qui sum”) was identified with the Aristotelian Unmoved Mover, the Neoplatonic One, and the Johannine Logos simultaneously.

This lecture is a high-altitude technical descent through the entire medieval ontological edifice, using the most recondite vocabulary available in Latin scholasticism and its modern retrieval: esse ipsum subsistens, realis distinctio, intentio secunda, haecceitas, univocatio entis, formalitates, suppositum, esse virtuale, transitorietas, esse ab alio, esse ad aliud, analogia attributionis vs proportionalitatis, virtus obedientialis, lumen gloriae, synderesis, quidditative vs existentiale esse, and dozens more.

1. Augustine (354–430): Illuminatio and the Itinerarium Mentis in Deum

Augustine is the hinge between antiquity and the Middle Ages. He rejected Manichaean dualism, absorbed Neoplatonism through Plotinus and Porphyry (in Victorinus’ translation), and re-described the entire cosmos in terms of interiority.

Key Augustinian innovations:

• Veritas as ontologically prior to mens: truth is not a human construction; it is the immutable light in which the mind sees (De Magistro 11–14).
• Illuminatio: the human intellect is not self-sufficient; it requires a divine irradiation to see necessary truths.
• Ratio aeterna: the Platonic Forms migrate into the mind of God as exemplaria or rationes aeternae.
• Memoria as ontological depth: the soul contains God “more inwardly than my inmost self” (interior intimo meo, Conf. III.6.11).
• Evil as privatio boni and meonic non-being.
• Time as distensio animi (Confessions XI): created being is characterized by transitorietas, the perpetual perishing of the now.

Augustine’s psychology introduces synderesis (συντήρησις) — the scintilla conscientiae, an infallible spark of conscience that always inclines to the good even after original sin.

2. Boethius (c. 480–524): The First Scholastic

Boethius’ De Trinitate and Opuscula Sacra provide the Latin technical vocabulary that will dominate for a thousand years:

• Substantia, persona, natura, relatio
• The distinction between id quod est (suppositum) and esse/quo est (forma)
• Universalia ante rem (in mente Dei), in re (in singularibus), post rem (in intellectu nostro)

His Consolation of Philosophy V.6 famously states that God is extra-temporal aeternitas — the simultaneous and perfect possession of boundless life.

3. Thomas Aquinas (1225–1274): Esse Ipsum Subsistens and Analogia Entis

Aquinas is the apex of medieval synthesis. His two greatest metaphysical innovations are:

A. The real distinction between essentia and esse B. The doctrine of participatio essendi and analogia entis

3.1 Essentia/Essendum vs Esse/Actus Essendi

In every created being, essence (quidditas) is really distinct from its act of existence (esse). Essence answers “quid est?”; esse answers “an sit?” and is the actus omnium actuum (De Potentia 7.2 ad 9). God alone is ipsum esse subsistens — existence itself subsisting, in whom essence and existence are identical.

Consequences:

• Creatures are composed of potentia essendi (essentia) and actus essendi (esse).
• Creation is not change but the total dependence of esse ab alio in every instant.
• Evil is privatio debiti esse.

3.2 Participation and Analogy

Being is not univocal (against Scotus later) nor equivocal (against nominalism), but analogical:

• Analogia attributionis: health is said of animal, urine, and diet, but primarily of animal.
• Analogia proportionalitatis: being is said of substance and accident proportionately.

Most profoundly, creatures participate in esse according to their degree of act. The hierarchy of being is a hierarchy of intensity of esse.

3.3 The Five Ways and the Structure of Transcendental Causality

Each via moves from an undeniable transcendental (motus, causalitas, contingentia, gradus perfectionis, teleologia) to an ipsum whose essence is identical with its esse.

3.4 Intellectus Agens and the Lumen Gloriae

Aquinas accepts Aristotle’s agent intellect but baptizes it: it is immaterial and, in via, abstracts species intelligibiles from phantasmata. In patria, the beatific vision requires a supernatural lumen gloriae elevating the intellect to see God per essentiam.

4. John Duns Scotus (1266–1308): Univocatio Entis and Haecceitas

Scotus dismantles Aquinas’ analogy and real distinction, inaugurating a new precision:

• Ens univocum: being is univocal to God and creatures as a conceptus simpliciter simplex, otherwise we could not reason about God at all (Ordinatio I d.3).
• Distinctio formalis a parte rei: between quiddity, esse, and haecceitas — not real distinction (separability) but objective formal non-identity.
• Haecceitas: the ultimate individualizing principle, “thisness,” contracting the common nature to singular existence.
• Voluntarism: God’s primary attribute is infinite will, not intellect. The Decalogue is contingent on divine liberissima voluntas.

Scotus’ doctrine of synchronic contingency and instantiae naturae prefigures modal metaphysics.

5. William of Ockham (1287–1347): Terminism and the Razor

Ockham detonates the entire edifice of real universals:

• Universale est signum mentalis (conceptus) or vocale (terminus), not a res extra animam.
• Entia non sunt multiplicanda praeter necessitatem — the famous Razor.
• Suppositio personalis vs materialis vs simplex.
• Intuitive cognition (notitia intuitiva) of singulars is possible even of non-existents (God can cause it directly).
• God’s potentia absoluta can do anything not involving formal contradiction.

Ockham’s nominalism/conceptualism dissolves the medieval synthesis and opens the path to early modern subjectivism.

6. The Condemnations of 1277 and the Fracture of Synthesis

The Parisian condemnations (especially propositions 34, 36, 66, 81) forbid teaching that God could not create multiple worlds, move the heavens rectilinearly, or make accidents exist sine subiecto. This liberates speculative theology from Aristotelian necessity and accelerates voluntarism.

Key Technical Vocabulary (strict scholastic usage)

• esse ab alio / ad aliud / in alio – existence from another / toward another / in another
• ipsum esse subsistens – subsistent existence itself
• distinctio realis / formalis / rationis – real / formal / of reason
• esse essentiae vs esse existentiae – essence-existence distinction
• participatio essendi – participation in the act of being
• analogia entis – analogy of being
• suppositum / subsistentia – concrete subsisting subject
• haecceitas – thisness (Scotus)
• univocatio entis – univocity of being
• virtus obedientialis – obediential potency
• lumen gloriae – light of glory
• species intelligibilis / expressa – intelligible species / expressed concept
• intentio prima / secunda – first / second intention
• transitorietas – transience of created being
• synderesis – spark of conscience
• potentia absoluta / ordinata – absolute / ordained power
• notitia intuitiva / abstractiva – intuitive / abstractive cognition

Study Questions (doctoral-level)

1. Explain why Aquinas insists that esse is the actus essendi and not a state. How does this differ from Scotus’ understanding of esse as an intrinsic mode?
2. Reconstruct the argument for the real distinction between essence and existence using only De Ente et Essentia ch. 4.
3. Why does Scotus claim that being must be univocal if theology is to be a science? Is his critique of analogy decisive?
4. Show how Ockham’s theory of intuitive cognition of non-existents undermines Aquinas’ proof of God from contingency.
5. Using only Summa Theologiae I q.12, explain why the beatific vision requires a supernatural lumen gloriae rather than natural intellectual light.

In our next fifth lecture, we will cross the threshold into modernity: Descartes’ res cogitans/extensa, the mathesis universalis, the ontological argument redivivus, and the birth of the subject as the new hypokeimenon.