Ideas from 'De Ente et Essentia (Being and Essence)' by Thomas Aquinas [1267], by Theme Structure
[found in 'Selected Philosophical Writings' by Aquinas,Thomas (ed/tr McDermott,Timothy) [OUP 1993,0-19-282946-7]].
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2. Reason / D. Definition / 5. Genus and Differentia
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13070
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If definitions must be general, and general terms can't individuate, then Socrates can't be defined [Cover/O'Leary-Hawthorne]
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11197
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The definitions expressing identity are used to sort things
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7. Existence / A. Nature of Existence / 3. Being / e. Being and nothing
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11195
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If affirmative propositions express being, we affirm about what is absent
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8. Modes of Existence / B. Properties / 8. Properties as Modes
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11201
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Properties have an incomplete essence, with definitions referring to their subject
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8. Modes of Existence / D. Universals / 6. Platonic Forms / d. Forms critiques
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11205
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If the form of 'human' contains 'many', Socrates isn't human; if it contains 'one', Socrates is Plato
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9. Objects / A. Existence of Objects / 5. Individuation / a. Individuation
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13090
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The principle of diversity for corporeal substances is their matter [Cover/O'Leary-Hawthorne]
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9. Objects / D. Essence of Objects / 1. Essences of Objects
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11202
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It is by having essence that things exist
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9. Objects / D. Essence of Objects / 2. Types of Essence
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11203
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Specific individual essence is defined by material, and generic essence is defined by form
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9. Objects / D. Essence of Objects / 4. Essence as Definition
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11200
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The definition of a physical object must include the material as well as the form
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9. Objects / D. Essence of Objects / 5. Essence as Kind
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11196
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Essence is something in common between the natures which sort things into categories
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9. Objects / D. Essence of Objects / 6. Essence as Unifier
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11208
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A simple substance is its own essence
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14. Science / D. Explanation / 2. Types of Explanation / k. Explanations by essence
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11198
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Definition of essence makes things understandable
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19. Language / C. Assigning Meanings / 3. Predicates
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11206
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The mind constructs complete attributions, based on the unified elements of the real world
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26. Natural Theory / C. Causation / 5. Direction of causation
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11207
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A cause can exist without its effect, but the effect cannot exist without its cause
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