Neoplatonism

Plotinus's legacy was preserved by his pupil, Porphyry of Tyre (c. 232–c. 304), who wrote a biography of the master and published his tractates under the title Enneads. Porphyry's own writings include a manual of Plotinian metaphysics (Sentences) and commentaries on various texts, including Homer's Odyssey (On the Cave of the Nymphs) and Aristotle's Categories (Isagoge). Porphyry took a religious view of the philosophical enterprise and, while denouncing Christianity as an irrational cult, introduced into the Neoplatonic canon the second-century Chaldean Oracles, Platonic texts that he regarded as true revelation.

These writings also inspired the Neoplatonist Iamblichus (d. c. 330), who founded what is sometimes called the Syrian school. Iamblichus did not share the optimistic Plotinian view about the ease of salvation; he supplemented philosophy with theurgy—rituals invoking the divine powers for aid. His innovations were adopted by the schools in Alexandria and Athens, the other major centers of Neoplatonism. The inclusion of traditional pagan elements in Iamblichus's system made it attractive to Emperor Julian (331?–363), who promoted Syrian Neoplatonism in his attempt to revive paganism.

The foremost representative of the Athenian school was Proclus (410?–485), who wrote two influential works of systematic metaphysics, the Elements of Theology and Platonic Theology. He was head of a revived academy, which remained a bastion of paganism, and attacked the Christian doctrine of creation. The Alexandrian school, however, was diverse; it included some Christians, one of whom, John Philoponos (c. 490–570), wrote a rebuttal to Proclus's attack. The Alexandrian school displayed a keen interest in Aristotle, and Philoponos is often regarded as an Aristotelian rather than a Neoplatonist, although his independence of mind makes either characterization questionable. Other noteworthy Neoplatonists were the Athenians Plutarch (d. c. 432), Syrianus (d. c. 437), Damascius (d. after 538), and Simplicius (d. 560) and the Alexandrians Hypatia (d. 415), Hierocles (fifth century), Ammonius (d. after 517), and Olympiodorus (d. after 565).