Plotinus was born around 204 CE — probably in Lycopolis in Egypt, though he was Roman in culture and wrote entirely in Greek. Almost everything we know about his life comes from the biography written by his student Porphyry, which serves as the introduction to the Enneads. According to Porphyry, Plotinus was deeply embarrassed by the fact of having a body — he refused to tell anyone where he was born or who his parents were, would not celebrate his birthday, and declined to be painted or sculpted, saying that it was enough to carry the image that nature had put on him without agreeing to leave a longer-lasting image of an image.
He came to philosophy late — at twenty-eight, in Alexandria, when he encountered the philosopher Ammonius Saccas and immediately recognised him as the teacher he had been searching for. He studied with Ammonius for eleven years without leaving. He then joined the military expedition of the Emperor Gordian III against Persia — hoping to study Persian and Indian philosophy at their sources — but the expedition ended disastrously with Gordian's murder. Plotinus made his way to Rome, where he established his school around 244 CE.
In Rome, Plotinus attracted an extraordinary circle of students — senators, physicians, poets and the Emperor Gallienus himself, who reportedly considered granting Plotinus a ruined city in Campania to establish a philosophical community called Platonopolis. The project never materialised. Plotinus taught through discussion rather than formal lecture — Porphyry describes a seminar in which texts were read and Plotinus questioned and explored them with the group, rather than delivering polished lectures.
He began writing only in his fiftieth year. The fifty-four treatises that constitute the Enneads were written over the last sixteen years of his life, edited and arranged by Porphyry after his death. Porphyry reports that Plotinus experienced mystical union — the complete absorption of the individual soul into the One — four times during the years they were together. Plotinus died in 270 CE, reportedly saying: "Try to bring back the god in you to the divine in the All."