Augustine of Hippo

Augustine's theological and philosophical system marks the definitive synthesis of Neoplatonic metaphysics and Pauline-Christian revelation, establishing the foundational concepts of Western interiority, divine grace, and the theology of history.

• Privation of Good (Privatio Boni): Evil possesses no ontological substance; it is an ontological deficiency, defect, or corruption of an inherently good creation, originating in the disordered choice of free will (aversio a Deo, conversio ad creaturam).
• Order of Love (Ordo Amoris): Virtue is defined as rightly ordered affection. Moral error consists in fruition (enjoying as an ultimate end) that which ought only to be used (as an instrument toward God), and using that which ought to be enjoyed.
• Theory of Divine Illumination: Human reason cannot grasp immutable, necessary intelligible truths (mathematics, logic, moral axioms) purely through natural faculties or sensory abstraction; the mind requires direct illumination from the divine intellect, the internal teacher (Magister Interior).
• Psychology of Time (Distentio Animi): Objective time is not merely the motion of celestial spheres. Time exists in the human soul as a three-fold distension: the memory of the past, the immediate attention to the present, and the anticipation of the future.
• Radical Grace and Total Inability: Following the Fall, the human will is afflicted by concupiscence (concupiscentia) and incapable of willing the supernatural good without prevenient, unmerited grace (gratia praeveniens).
• The Two Cities (Duae Civitates): Universal history is structured by the conflict between two loves: the earthly city driven by love of self to the contempt of God (amor sui), and the heavenly city driven by love of God to the contempt of self (amor Dei).

2.1 Metaphysics of Evil as Privative Defect

Let reality be ordered by degrees of being and goodness, where Being ($\mathcal{B}$) is coextensive with Good ($\mathcal{G}$):

$$\mathcal{B}(x) \equiv \mathcal{G}(x), \quad \forall x \in \text{Creation}$$

Let $x$ be a created nature with intrinsic perfection $P_0$. Evil ($E$) is defined not as an extant entity $e \in \text{Entities}$, but as a mathematical deficiency:

$$E(x) = P_0(x) - P_{actual}(x), \quad \text{where } P_{actual}(x) < P_0(x)$$

$$E \notin \text{Substance} \implies \text{Evil has a deficient cause, not an efficient cause}$$

$$\text{Deficient Cause: } C_d = \text{Volitional turning from } G_{supreme} \to G_{inferior}$$

2.2 Psychological Distension of Time (Distentio Animi)

Let time $T$ not be an independent container, but the mind's stretching across flux:

$$T = \int_{\tau_0}^{\tau_1} dt \equiv \mathcal{D}(\text{Soul})$$

The three dimensionalities of temporal consciousness reduce to simultaneous mental states:

$$\begin{aligned} \text{Past} &\longrightarrow \text{Memory } (\mathcal{M}) \\ \text{Present} &\longrightarrow \text{Direct Attention / Sight } (\mathcal{A}) \\ \text{Future} &\longrightarrow \text{Expectation / Hope } (\mathcal{E}) \end{aligned}$$

Total temporal continuity is maintained solely through the unifying focus of the soul:

$$\Psi_{time}(t) = \langle \mathcal{M}_{past}, \mathcal{A}_{present}, \mathcal{E}_{future} \rangle$$

3.1 The Two Cities and the Polarized Loves

+--------------------------------------------------------------------------+
|                            SUPREME ETERNAL GOOD                          |
|                       Source of All Being and Order                      |
+--------------------------------------------------------------------------+
          ^                                              ^
          | AMOR DEI                                     | AMOR SUI
          | (Love of God -> Contempt of Self)            | (Love of Self -> Contempt of God)
          |                                              |
+------------------------------------+   +------------------------------------+
|          CIVITAS DEI               |   |          CIVITAS TERRENA           |
|      (The City of God)             |   |       (The Earthly City)           |
|                                    |   |                                    |
| * Citizenship: Elect / Pilgrims    |   | * Citizenship: Secular Imperial    |
| * End: Eternal Beatitude           |   | * End: Temporal Domination         |
| * Character: Humility, Charity     |   | * Character: Pride, Libido         |
| * Temporal Status: Alien Migrant   |   | * Temporal Status: Dominant Order  |
+------------------------------------+   +------------------------------------+
          \                                              /
           \                                            /
            \                                          /
+--------------------------------------------------------------------------+
|                        SAECULUM (MIXED TEMPORAL AGE)                     |
|           Both cities intertwined in history until Final Judgement       |
|            Secular Law & Peace: Negative restraint of violence           |
+--------------------------------------------------------------------------+

3.2 Epistemology of Divine Illumination

[ Eternal Forms / Divine Ideas ] ---> [ Divine Illumination (Christ, Inner Teacher) ]
                                                      |
                                                      v
[ Sensory Data / Material Signs ] ---> [ Rational Human Mind ] ---> [ Judgement of Truth ]

• Textual Corpus: Author of over 5 million words surviving into antiquity; 113 books and treatises, over 200 letters, and more than 500 homilies.
• The City of God: 22 books, written over 13 years (413–426), representing the foundational text of Western philosophy of history and political theology.
• The Confessions: 13 books (c. 397–400), universally recognized as the pioneering psychological autobiography in world literature.
• Episcopal Tenure: 35 years as Bishop of Hippo Regius (395–430), judging civil court cases weekly, arbitrating property disputes, and administering ecclesiastical charities.
• Theological Dominance: The primary theoretical authority cited by medieval Scholastics (Peter Lombard, Thomas Aquinas), Protestant Reformers (Martin Luther, John Calvin), and early modern philosophers (René Descartes, Blaise Pascal).

5.1 The Predestinarian Rigidity of the Late Anti-Pelagian Treatises

In his polemical zeal against Julian of Eclanum and Pelagius, Augustine articulated an uncompromising doctrine of unconditional double predestination and inherited guilt (peccatum originale originatum) passed down physically through sexual concupiscence. This formulation characterized the unbaptized human race as a "damned lump" (massa damnata), creating immense moral and theological difficulties regarding human responsibility and divine benevolence that alienated Eastern Christian orthodoxy and sparked persistent Western dissent.

5.2 Justification of Coercion in Religious Schism

During the Donatist controversy, Augustine developed an exegetical defense of imperial state coercion against schismatics, citing the Gospel phrase compelle intrare ("compel them to come in", Luke 14:23). Although Augustine personally urged magistrates to avoid capital punishment and seek restorative pastoral correction, his theoretical framework was subsequently cited throughout the Middle Ages and early modern period to legitimize the Inquisition and the execution of religious heretics.

5.3 Anti-Physical Asceticism and Bodily Pessimism

Augustine's deep Platonist background and personal psychological wrestling with sexual habit led to an intensely negative valuation of sexuality and embodiment within Christian marriage. By identifying the transmission of original sin with the involuntary physiological agitation of sexual intercourse, Augustine bequeathed to Western culture a lingering association of bodily passion with inherent moral contamination.

• Augustine. Confessiones (c. 397–400). Ed. James J. O'Donnell. 3 vols. Oxford: Clarendon Press, 1992.
• Augustine. De Civitate Dei contra Paganos (413–426). Ed. B. Dombart and A. Kalb. Corpus Christianorum Series Latina 47–48. Turnhout: Brepols, 1955.
• Augustine. De Trinitate (399–420). Ed. W. J. Mountain. CCSL 50–50A. Turnhout: Brepols, 1968.
• Augustine. De Doctrina Christiana (396–426). Ed. R. P. H. Green. Oxford: Oxford University Press, 1995.
• Augustine. De Libero Arbitrio (388–395). Ed. W. M. Green. CCSL 29. Turnhout: Brepols, 1970.
• Brown, Peter. Augustine of Hippo: A Biography. Berkeley: University of California Press, 1967; 2nd ed., 2000.
• Chadwick, Henry. Augustine: A Very Short Introduction. Oxford: Oxford University Press, 1986.