Neoplatonism

Plotinus (205–270) is commonly regarded as the founder of Neoplatonism. He studied in Alexandria before founding his own school circa 244 in Rome, where he devised a comprehensive philosophy that has been preserved in the Enneads. For Plotinus, philosophy was not exclusively an effort of reasoned argument, since he equated the love of wisdom with assimilation to God, which is possible only through mystical ecstasy—a state Plotinus himself experienced. Discursive reasoning merely assists in attaining this higher end by clarifying what constitutes reality.

Plotinus's ontology reflects his mystical vision. Adapting the Middle Platonists' threefold division of God, Plotinus called the highest level of divinity, or first hypostasis, "the One"—a perfect unity, infinite and unknowable. Its super-abundant goodness impels it to emanate existence in a cascading chain of being. As the source of all existence, the One itself actually transcends being. Hence the highest being is the divine Mind, which is emanated directly by the One. This second hypostasis, in which the Ideas are located, further emanates a third hypostasis, which is called Soul as it contemplates the intelligible realm and Nature as it previews what it will produce. Time and the physical world thus emanate from Soul/Nature. The process of emanation ends when being is so attenuated that a limit is finally reached. This lowest stage of emanation is matter, which exists only potentially. Inasmuch as being is linked with goodness, matter's virtual absence of being is seen as the source of evil. Although matter is not substantially evil, since it ultimately emanates from the One, nevertheless evil resides in its state of privation.

Human souls, like the third hypostasis, are divided into a higher part that perceives the intelligible world and a lower part that cares for a material body. The individual soul falls into degradation when it is excessively concerned with material things and forgets its true identity. Philosophy reminds the wayward soul that it is an immaterial substance and thus opens the way for salvation, whereby the enlightened soul chooses to return to the intelligible world, from which it can ascend to the bliss of union with the One.