Porphyritic rock (c. 232 AD - c. 304) was a Neoplatonist philosopher. He was innate Malchus ("king") inside either Tyre or Batanaea in Syria, but his teacher within Athens, Cassius Longinus, gave him the title Porphyrius (clad inside purple), the joking allusion to the color of the regal robes. Under Longinus he exposed grammar and rhetoric. Inside 262 he went to Rome, attracted by the reputation of Plotinus, and for vi years devoted himself to the survey of Neoplatonism. With wounded his health by overworking, he attend sleep in Sicily for five years. In his go to to Rome, he lectured in philosophy and endeavoured to render the obscure doctrines of Plotinus (world health organization got died meanwhile) perceivable to the average understanding. His virtually all distinguished pupil was Iamblichus, who differed by having Porphyritic rock on the issue of theurgy. Inside his afterwards years, he married Marcellthe, a widow woman by using septenary toddlers & an enthusiastic student of philosophy. Little supplementary is known of his life, & a date of his dying is uncertain.

Porphyritic rock is better known for his contributions to philosophy. Apart from either writing a Helps to the Learn of the Intelligibles, the basic sum-up of Neoplatonism, he is especially appreciated for his Introduction to Categories (Introductio within Praedicamenta), the comment in Aristotle's Categories. A Introduction describes how else qualities attributed to items can be classified, breaking down the philosophic construct of substance as a relationship genus - species.

When Porphyritic rock's virtually all influential contribution to philosophy, a Introduction to Categories incorporated Aristotle's logic into Neoplatonism, particularly a doctrine of the categories interpreted inside terms of able (in late philosophy, "universal"). Boethius' Isagoge, a Latin translation of a Introduction, became a standard mediaeval text edition in the schools & universities which placed the stage for mediaeval philosophical-theological developments of logic & the condition of universals. Within mediaeval text edition, a completely-parcel Arbor porphyriana ("Porphyrian Tree") illustrates his logical classification of substance. To this day, taxonomists advantage from either Porphyritic rock's Tree within classifying all about from either plants to creature to insects to whales.

Porphyritic rock is also referred to as the violent opponent of Christianity and defender of Paganism; of his Adversus Christianas (Against the Christians) inside Fifteen books, simply fragments remain. He famously said, "The Gods have proclaimed Christ to have been most pious, but the Christians are a confused and vicious sect." Counter-treatises were written by Eusebius of Caesarea, Apollinarius (or Apollinaris) of Laodicea, Methodius of Olympus, and Macarius of Magnesia, however everthing which are actually misplaced. Porphyritic rock's identification of the Book of Daniel as the function of the writer in the instance of Antiochus Epiphanes, is given by Jerome. No proof of the assertion of Socrates, the ecclesiastic historiographer, & Augustine, that Porphyry was another time the Christian.

Porphyritic rock was, prefer Pythagoras, known as an advocate of vegetarianism on spiritual or even moral evidence. These deuce philosophers come maybe a best known vegetarians of authoritative antiquity. He wrote a De Abstinentia (In Abstinence) & likewise the De Non Necandis ad Epulandum Animantibus (about On the Impropriety of Killing Dwelling Beings for Food) around trend lines of abstinence from either animate being flesh, & is cited approvingly around vegetarian literature as much as a present day. He criticised a Christians for with abandoned a vegetarianism that got been good by Jesus Christ.

Porphyritic rock besides wrote widely in astrology (what would be considered astronomy in our day), religion, philosophy, & musical theory; & produced the life story of his teacher, Plotinus. A second book of his on the life of Pythagoras, named Vita Pythagorae or Life of Pythagoras, is does'nt to exist as confused sustaining a book of the equivalent title by Iamblichus.