Ousia

Definition and stakes

Portrait of Edwin Hatch Edwin Hatch,  The influence of Greek ideas and usages upon the Christian church (1914)

“ When, therefore, the use of ousia in its Neo-Platonic sense prevailed, there arose a tendency to differentiate the two terms, and to designate that which in Aristotle had been πρώτη οὐσία by the term ὑπόστασις. This is expressed by Athanasius when he says: “Ousia signifies community,” while “hypostasis has property which is not common to the hypostases of the same ousia;” ”
Source: Gutenberg

Portrait of Edwin Hatch Edwin Hatch,  The influence of Greek ideas and usages upon the Christian church (1914)

“ Hence in both philosophical and Christian cosmologies, ousia was sometimes [270] used as interchangeable with hylê, to denote the matter out of which the world was made.
(b) It is used of matter embodied in a certain form: this has since been distinguished as the substantia concreta. In Aristotle, a sensible material thing, a particular man or a particular horse, which in a predication must always be the subject and cannot be a predicate, is an ousia in the strictest sense.
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Source: Gutenberg

Portrait of Alfred Russel Wallace Alfred Russel Wallace,  Island Life — Chapter XV. (1895)

“ The island of Oahu, in which the capital is situated, has furnished about half the species already known. This is partly due to its being more forest-clad, but also, no doubt, in part to its being better explored, so that notwithstanding the exceptional riches of the group, we have no reason to suppose that there are not many more species to be found in the less explored islands. ”
Source: Wikisource

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