On Abstinence from Animal Food

...philosophical, as well as rhetorical and grammatical works he wrote: one book On Divine Names; two On Principles; six On Matter; five On the Soul addressed to Boethus; four On Abstinence from Eating Living Creatures original: "De abstinentia ab esu animalium" — Porphyry's famous treatise advocating for vegetarianism based on Neoplatonic principles; four On that which was said by the wise man, "Know Thyself"; a work On Incorporeal Realities; seven books arguing That the school of Plato and Aristotle is one and the same; four On the history of Julian the Chaldean philosopher; seven books On Aristotle's Categories addressed to Gedalius; one on those same Categories via question and answer; a work On the Philosophy of Homer; a treatise showing That according to the opinion of Aristotle, the soul is an entelechy original: ἐντελέχεια (entelecheia) — a philosophical term meaning 'actualization' or 'full realization', that is, it is a perfection; five books of Philosophical History; a work On Genus, Species, Difference, Property, and Accident This work is known as the "Isagoge," which became the standard introductory textbook for logic throughout the Middle Ages; On the Sources of the Nile according to the opinion of Pindar; ten books On the utility that kings can derive from Homer; seven books of Miscellaneous Questions; seven books On the introduction of Thucydides addressed to Aristides; a work On the rhetorical art of Minucianus; and many others, especially astronomical works, among which is an Introduction to Astronomy completed in three books, and Grammatical Questions. He flourished under the reign of Aurelian Roman Emperor from 270–275 AD and lived until the times of Diocletian Roman Emperor from 284–305 AD.