The term ousia — variously rendered as 'substance,' 'essence,' 'being,' or 'beingness' — occupies a complex and contested position across the texts gathered in this corpus. Its career begins with Aristotle, for whom ousia in the fullest sense resolves toward form or essence, with the translator's choice of 'substance' remaining philosophically fraught, as the introduction to De Anima makes plain. Derrida, engaging Aristotle through the lens of deconstruction, isolates the decisive move by which ousia becomes synonymous with presence — ousia as energeia, privileged over dynamis — and argues that this equation secretly governs the entire metaphysical tradition, including Hegel. Bulgakov imports the term into Orthodox sophiology, where ousia-Sophia names the divine self-disclosure shared equally by all three hypostases of the Trinity, distinguishing it sharply from the Aristotelian category of abstract consubstantiality. Armstrong tracks ousia into Nicene theology, where the Cappadocians deploy the formula of a single ousia expressed in three hypostases as a way of mediating between divine incomprehensibility and human experience. Vernant and Seaford note the term's double semantic life in Greek — both philosophical 'substance' and 'patrimony' or 'wealth' — a tension that illuminates the socioeconomic pressures shaping early ontology. Ricoeur treats ousia as one of being's 'primitive significations,' examining its intersection with actuality and potentiality in Aristotle's Metaphysics. The term thus anchors debates spanning Trinitarian theology, deconstructive ontology, phenomenology of time, and the social history of Greek thought.
Being is nontime — time is nonbeing insofar as being already, secretly has been determined as present, and beingness (ousia) as presence.
Derrida identifies the foundational equation of ousia with presence as the hidden axiom structuring Aristotelian — and by extension the entire Western metaphysical — treatment of being and time.
, Margins of Philosophy, 1982thesis
The unity of the divine Ousia-Sophia is such that the Father possesses her first of all in the tri-unity of the Holy Trinity and therefore in common with the Son and the Holy Spirit.
Bulgakov identifies ousia with Sophia as the shared divine self-revelation belonging to all three hypostases, reinterpreting the Aristotelian category within a sophiological Trinitarian framework.
, Sophia, the Wisdom of God: An Outline of Sophiology, 1937thesis
Aristotle should come, however tentatively, to the conclusion that ousia in the fullest sense is form or essence may of course induce us to be disposed to reject the translation 'substance' for the term ousia.
The introduction to De Anima argues that Aristotle's own trajectory toward identifying ousia with form or essence renders the conventional Latin translation 'substance' philosophically misleading.
, De Anima (On the Soul), -350thesis
God had a single essence (ousia) which remained incomprehensible to us — but three expressions (hypostases) which made him known.
Armstrong shows how the Cappadocians deployed the ousia/hypostasis distinction to hold together divine incomprehensibility and relational knowability in Nicene orthodoxy.
, A History of God, 1993thesis
What sort of relationship can exist between the abstract Aristotelian ousia or substance, the principle of consubstantiality within the Holy Trinity, and the Wisdom and Glory which we find in the Bible.
Bulgakov poses the central question of his sophiology: how the philosophical category of ousia, deployed in Nicene consubstantiality, relates to the biblical figures of Wisdom and Glory.
, Sophia, the Wisdom of God: An Outline of Sophiology, 1937supporting
The very conception of Ousia itself is but that of Sophia, less fully developed.
Bulgakov argues that the theological concept of divine ousia is an underdeveloped approximation of the richer sophiological concept, which he regards as its proper fulfillment.
, Sophia, the Wisdom of God: An Outline of Sophiology, 1937supporting
The term ousia, which in philosophical terminology means being, substance, also means patrimony or wealth. But as Gernet has pointed out, this connection serves only to underline the opposite directions taken by philosophy.
Vernant, following Gernet, marks the semantic bifurcation of ousia between philosophical ontology and economic patrimony as evidence of philosophy's deliberate divergence from the sphere of monetary value.
, Myth and Thought Among the Greeks, 1983supporting
The intersecting of these two primitive significations of being, that of being appropriate to the categories (ousia, which in Latin is translated by substantia) and that of being as actuality and potentiality, leads, it seems, to weakening the ever so precious conquest of the idea of potency and actuality.
Ricoeur examines how the categorial sense of ousia, when it intersects with the actuality/potentiality distinction in Aristotle's Metaphysics, risks undermining the analytic power of the latter distinction.
, Oneself as Another, 1992supporting
That which we term ousia is by some called esia, and by others again osia.
Plato's Cratylus records the dialectal and etymological variation in the term ousia, treating its name as philosophically significant and connecting it to the question of essence and being.
, Cratylus, -388supporting
Being (ousia) 76-93, 96
The index of Lorenz's study cross-references ousia under the heading 'Being,' indicating its role as a technical ontological category within the book's engagement with Platonic and Aristotelian philosophy.
, The Brute Within: Appetitive Desire in Plato and Aristotle, 2006aside