Considered the last of the great pagan philosophies, it was developed by Plotinus (3d cent. A.D.). It has had a lasting influence on Western metaphysics and mysticism, although its original form was much altered by the followers of Plotinus. Neoplatonism was a viable force from the middle of the 3d cent. to 529, when Justinian closed the Academy at Athens. Although Plotinus is the central figure of Neoplatonism, his teacher, Ammonius Saccus (175-242), a self-taught laborer of Alexandria, may have been the actual founder; however, no writings of Ammonius have survived. Plotinus left Egypt, settled in Rome in 244, and founded a school there.
The enduring source of Neoplatonist thought is the Enneads of Plotinus, which were collected and published after his death by his student Porphyry, a Phoenician. Plotinus' purpose was to put into systematic form an idealistic philosophy and thus combat the trends of Stoicism and skepticism that had crept into interpretations of the philosophy of Plato. Plotinus rejected the dualism of two disparate realms of being (good and evil, material and transcendent, universal and particular) and set forth instead one vast order containing all the various levels and kinds of existence.
At the center of the order is the One, an incomprehensible, all-sufficient unity. By the process of emanation the One gives rise to the Divine Mind or Logos [word], which contains all the forms, or living intelligences, of individuals. The content of the Divine Mind, therefore, constitutes a multiple reflection of the unitary perfection of the One. Below the divine mind is the World Soul, which links the intellectual and material worlds. These three transcendent realities, or hypostases (the One, the Divine Mind, and the World Soul) support the finite and visible world, which includes individuals and matter. Plotinus sometimes compared the One to a fountain, from which overflowed the lower levels of reality.
The Neoplatonic cosmology also had religious overtones, for Plotinus believed that people potentially sought a life in which the individual soul would rise through contemplation to the level of intelligence (the Divine Mind) and then through mystic union would be absorbed in the One itself. Conversely, a privation of being or lack of desire toward the One was the cause of sin, which was held to be a negative quality (i.e., nonparticipation in the perfection of the One). There are thus two reciprocal movements in Neoplatonism: the metaphysical movement of emanation from the One, and the ethical or religious movement of reflective return to the One through contemplation of the forms of the Divine Mind.
While Plotinus' thought was mystical (i.e., concerned with the infinite and invisible within the finite and visible world), his method was thoroughly rational, stemming from the logical and humanistic traditions of Greece. Many of his philosophical elements came from earlier philosophies; the existence of the One and the attendant theory of ideas were aspects of the later writings of Plato, particularly the Timaeus, and Stoicism had identified the World Soul with transcendent universal reason. What was distinctive in Plotinus' system was the unified, hierarchical structuring of these elements and the theory of emanation.
The followers of Plotinus took divergent paths. Porphyry, who remained in Rome, made extensive use of allegory in expounding Plotinus' rationalistic thought and attacked Christianity in the name of Hellenic paganism. Lamblichus taught in Rome for a time and then returned to Chalcis in Syria to found a Neoplatonic center there. At this center, and also at others in Athens and Alexandria, the mystical trends of the East, including divination, demonology, and astrology, were grafted onto the body of Neoplatonism.
The central figures at the Athenian school were Plutarch the Younger (350-433) and Proclus, who came from Byzantium to become head of the Academy. The Athenian school culminated in Simplicius, a commentator on Aristotle, and Damascius, who tried to recover the original thought of Plotinus; they were the survivors of the Academy when it was closed in 529. The Alexandrian school of Neoplatonism, which included the woman philosopher Hypatia, was more scholarly but less theological than its Syrian and Athenian counterparts and is important mainly for its commentaries on Aristotle. It survived into the 7th cent., and some Alexandrian Neoplatonists, notably Synesius, became Christians.
Neoplatonism was an early influence on Christian thinkers. The Christian apologists Clement of Alexandria and Origen had vied with the incipient Neoplatonic tradition for control of the Platonic heritage. The philosophy was firmly joined with Christianity by St. Augustine, who was a Neoplatonist before his conversion. It was through Neoplatonism that Augustine conceived of spirit as being immaterial and viewed evil as an unreal substance (in contradistinction to Manichaean doctrine). The writings of Pseudo-Dionysius (see Dionysius the Areopagite) and Boethius display Neoplatonic influences.
In the Middle Ages, elements of Plotinus' thought can be found in St. Thomas Aquinas and John Scotus Erigena, particularly in the identification of the One with God and the Divine Mind with the angels. The system influenced medieval Jewish and Arab philosophy, and G. W. F. Hegel's metaphysics had Neoplatonic ingredients. Neoplatonic metaphysics and aesthetics also influenced the German Romantics (see romanticism), the 17th-century English metaphysical poets, William Blake, and the Cambridge Platonists. Many mystical movements in the West, including those of Meister Eckhardt and Jacob Boehme, owe something to the Neoplatonists.
See R. T. Wallis, Neoplatonism (1972); R. Baine Harris, ed., The Significance of Neoplatonism (1976); E. R. Doss, Select Passages Illustrating Neoplatonism (1980).
Form of Platonism developed by Plotinus in the 3rd century AD and modified by his successors. It came to dominate the Greek philosophical schools and remained predominant until the teaching of philosophy by pagans ended in the late 6th century. It postulated an all-sufficient unity, the One, from which emanated the Divine Mind, or logos, and below that, the World Soul. Those transcendent realities were thought to support the visible world. All things emanated from the One, and individual souls could rise to mystical union with the One through contemplation. Though Plotinus's thought in some respects resembles Gnosticism, he was passionately opposed to that doctrine.
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Neoplatonism took definitive shape with the philosopher Plotinus, who claimed to have received his teachings from Ammonius Saccas, a dock worker and philosopher in Alexandria. Plotinus was also influenced by Alexander of Aphrodisias and Numenius of Apamea. Plotinus's student Porphyry assembled his teachings into the six Enneads.
Subsequent Neoplatonic philosophers included Hypatia of Alexandria, Iamblichus, Proclus, Hierocles of Alexandria, Simplicius of Cilicia, and Damascius, who wrote On First Principles. Born in Damascus, he was the last teacher of Neoplatonism at Athens. Neoplatonism strongly influenced Christian thinkers (such as Augustine, Boethius, Pseudo-Dionysius, John Scotus Eriugena, and Bonaventura). Neoplatonism was also present in medieval Islamic and Jewish thinkers such as al-Farabi and Maimonides, and experienced a revival in the Renaissance with the acquisition and translation of Greek and Arabic Neoplatonic texts.
Although the founder of Neoplatonism is supposed to have been Ammonius Saccas, the Enneads of his pupil Plotinus are the primary and classical document of Neoplatonism. As a form of mysticism, it contains theoretical and practical parts, the first dealing with the high origin of the human soul showing how it has departed from its first estate, and the second showing the way by which the soul may again return to the Eternal and Supreme. The system can be divided between the invisible world and the phenomenal world, the former containing the transcendent One from which emanates an eternal, perfect, essence (nous), which, in turn, produces the world-soul.
The human souls which have descended into corporeality are those which have allowed themselves to be ensnared by sensuality and overpowered by lust. They now seek to cut themselves loose from their true being; and, striving after independence, they assume a false existence. They must turn back from this; and, since they have not lost their freedom, a conversion is still possible.
They did not believe in an independent existence of evil. They compared it to darkness, which does not exist in itself but only as the absence of light. So too, evil is simply the absence of good. Things are good insofar as they exist; they are evil only insofar as they are imperfect, lacking some good that they should have. It is also a cornerstone of Neoplatonism to teach that all people return to the Source. The Source, Absolute, or One is what all things spring from and, as a superconsciousness, is where all things return. It can be said that all consciousness is wiped clean and returned to a blank slate when returning to the Source. All things have force or potential (dynamis) as their essence. This dynamis begets energy (energeia). When people return to the Source, their energy returns to the One, Monad, or Source and is then recycled into the cosmos, where it can be broken up and then amalgamated into other things.
The Neoplatonists believed in the pre-existence, and immortality of the soul. The human soul consists of a lower irrational soul and a higher rational soul (mind), both of which can be regarded as different powers of the one soul. It was widely held that the soul possesses a "vehicle", accounting for the human soul's immortality and allowing for its return to the One after death. After bodily death, the soul takes up a level in the afterlife corresponding with the level at which it lived during its earthly life. The Neoplatonists believed in the principle of reincarnation. Although the most pure and holy souls would dwell in the highest regions, the impure soul would undergo a purification, before descending again, to be reincarnated into a new body, perhaps into animal form. A soul which has returned to the One, achieves union with the cosmic universal soul, and does not descend again, at least, not in this world period.
Ammonius Saccas (birth unknown death ca. 265 AD) is a founder of Neoplatonism and the teacher of Plotinus. Little is known of the teacher other than both Christians (see Eusebius, Jerome, and Origen) and pagans (see Porphyry and Plotinus) claim him a teacher and founder of the Neoplatonic system. Porphyry stated in On the One School of Plato and Aristotle, that Ammonius' view was that the philosophies of Plato and Aristotle were in harmony. Eusebius and Jerome claimed him as a Christian until his death, whereas Porphyry claimed he had renounced Christianity and embraced pagan philosophy.
Plotinus (Greek: Πλωτῖνος) (ca. 205–270) was a major Hellenistic Egyptian philosopher of the ancient world who is widely considered the father of Neoplatonism. Much of our biographical information about him comes from Porphyry's preface to his edition of Plotinus' Enneads. While he was himself influenced by the teachings of classical Greek, Persian and Indian philosophy and Egyptian theology, his metaphysical writings later inspired numerous Christian, Jewish, Islamic and Gnostic metaphysicians and mystics over the centuries. Plotinus taught that there is a supreme, totally transcendent "One", containing no division, multiplicity or distinction; likewise it is beyond all categories of being and non-being. The concept of "being" is derived by us from the objects of human experience, and is an attribute of such objects, but the infinite, transcendent One is beyond all such objects, and therefore is beyond the concepts that we derive from them. The One "cannot be any existing thing", and cannot be merely the sum of all such things (compare the Stoic doctrine of disbelief in non-material existence), but "is prior to all existents".
Porphyry (Greek: Πορφύριος, c. A.D. 233– c. 309) was a Syrian Neoplatonist philosopher. He wrote widely on astrology, religion, philosophy, and musical theory. He produced a biography of his teacher, Plotinus. He is important in the history of mathematics because of his Life of Pythagoras, and his commentary on Euclid's Elements which was used by Pappus when he wrote his own commentary. [1] Porphyry is also known as an opponent of Christianity and defender of Paganism; of his Adversus Christianos (Against the Christians) in 15 books, only fragments remain. He famously said, "The gods have proclaimed Christ to have been most pious, but the Christians are a confused and vicious sect."
Iamblichus, also known as Iamblichus Chalcidensis, (ca. 245 - ca. 325, Greek: Ιάμβλιχος) was a Syrian neoplatonist philosopher who determined the direction taken by later Neoplatonic philosophy, and perhaps western philosophical religions themselves. He is perhaps best known for his compendium on Pythagorean philosophy. In Iamblichus' system the realm of divinities stretched from the original One down to material nature itself, where soul in fact descended into matter and became "embodied" as human beings. The world is thus peopled by a crowd of superhuman beings influencing natural events and possessing and communicating knowledge of the future, and who are all accessible to prayers and offerings. Iamblichus had salvation as his final goal (see henosis). The embodied soul was to return to divinity by performing certain rites, or theurgy, literally, 'divine-working'. Some translate this as "magic", but the modern connotations of the term do not exactly match what Iamblichus had in mind, which is more along the lines of religious ritual.
Proclus Lycaeus (February 8, 412 – April 17, 485), surnamed "The Successor" or "diadochos" (Greek Πρόκλος ὁ Διάδοχος Próklos ho Diádokhos), was a Greek Neoplatonist philosopher, one of the last major Greek philosophers (see Damascius). He set forth one of the most elaborate, complex, and fully developed Neoplatonic systems. The particular characteristic of Proclus' system is his insertion of a level of individual ones, called henads between the One itself and the divine Intellect, which is the second principle. The henads are beyond being, like the One itself, but they stand at the head of chains of causation (seirai or taxeis) and in some manner give to these chains their particular character. They are also identified with the traditional Greek gods, so one henad might be Apollo and be the cause of all things apollonian, while another might be Helios and be the cause of all sunny things. The henads serve both to protect the One itself from any hint of multiplicity, and to draw up the rest of the universe towards the One, by being a connecting, intermediate stage between absolute unity and determinate multiplicity.
Julian (born c.331–died June 26, 363), was a Roman Emperor (361–363) of the Constantinian dynasty. He was the last pagan Roman Emperor, and tried to reform traditional Pagan worship by unifying Pagan worship in the Byzantine empire in the form of Neoplatonism developed by Iamblichus. Julian sought to do this after the legalization of Christianity and its widespread success within the Eastern Roman Empire.
Circa 500AD Simplicius of Cilicia is not known as an original thinker, but his remarks are thoughtful and intelligent and his learning is prodigious. To the student of Greek philosophy his commentaries are invaluable, as they contain many fragments of the older philosophers as well as of his immediate predecessors.
Gemistus Pletho (born c. 1355–died 1452) remained the preeminent scholar of Neoplatonic philosophy in the Eastern Roman Empire. He introduced his understanding and insight into the works of Neoplatonism during the failed attempt to reconcile the East-West schism at the council of Florence. At Florence Pletho met Cosimo_de'_Medici and influenced the latter's decision to found a new Platonic Academy there. Cosimo subsequently appointed as head Marsilio Ficino, who proceeded to translate all Plato's works, the Enneads of Plotinus, and various other Neoplatonist works into Latin.
Many other Christians were influenced by Neoplatonism, especially in their identifying the Neoplatonic One, or God, with Jehovah. The most influential of these would be Origen, the pupil of Ammonius Saccas and the fifth-century author known as Pseudo-Dionysius the Areopagite, (whose works were translated by John Scotus in the 9th century for the west) and proved significant for both the Eastern Orthodox and Western branches of Christianity. Neoplatonism also had links with Gnosticism, which Plotinus rebuked in his ninth tractate of the second Enneads: "Against Those That Affirm The Creator of The Kosmos and The Kosmos Itself to Be Evil" (generally known as "Against The Gnostics").
Due to their belief being grounded in Platonic thought, the Neoplatonists rejected gnosticism's vilification of Plato's demiurge, the creator of the material world or cosmos discussed in the Timaeus. Although Neoplatonism has been referred to as orthodox Platonic philosophy by scholars like Professor John D. Turner, this reference may be due in part to Plotinus' attempt to refute certain interpretations of Platonic philosophy, through his Enneads. Plotinus believed the followers of gnosticism had corrupted the original teachings of Plato.
Despite the influence this 'pagan' philosophy had on Christianity, Justinian I would hurt later Neoplatonism by ordering the closure of the refounded School of Athens. In the Middle Ages, Neoplatonist ideas influenced Jewish thinkers, such as the Kabbalist Isaac the Blind, and the Jewish Neoplatonic philosopher Solomon ibn Gabirol, who modified it in the light of their own monotheism. Neoplatonist ideas also influenced Islamic and Sufi thinkers such as al Farabi and Avicenna. Neoplatonism survived in the Eastern Christian Church as an independent tradition and was reintroduced to the west by Plethon.

Some cite American poet Ezra Pound as a Neo-platonist, albeit from a rather Confucian perspective due to his great admiration for Plotinus and his writings on philosophy and religion. Religiously he often described himself in public as a Hellenistic Pagan, though many feel this may have only been a metaphor for something primal and deeper such as the One.
Other notable modern Neoplatonists include Thomas Taylor, "the English Platonist," who wrote extensively on Platonism and translated almost the entire Platonic and Plotinian corpora into English, and the Belgian writer Suzanne Lilar.
The Druze, a religious community found primarily in Lebanon, Israel, and Syria, incorporate neoplatonic concepts into their beliefs.