This article records tradition as it has been passed down and reported. Its sources are not yet part of the atlas's verified catalogue.
Plotinus makes a claim that unsettles almost every ordinary assumption about what happens when a person is born. According to the Enneads, individual souls do not actually descend into the bodies they animate. They merely project an image of themselves downward, the way a source of light throws an image without ever leaving its place. The higher soul remains above, undisturbed, continuously present to the intelligible world, while what we experience as a life lived in a body is carried out by this projected image, this lower reflection acting as intermediary. Plotinus is explicit that the soul does not actually descend nor inhabit the bodies it animates, but merely projects upon them an image of itself, and that this undescended part continues to supervise the body's functions from above rather than becoming entangled in them.
The claim solves one problem and opens another. It solves the problem of how the soul can remain untouched by the corruption, pain, and moral failure that mark embodied life: if the highest part of the soul never really leaves the intelligible realm, then whatever goes wrong down here cannot stain what is eternal. But it opens a harder problem, which is how, if the higher soul never descends and remains continuous with the single World Soul, individual souls manage to stay individuals at all. If my soul and your soul are both fundamentally undescended and both continuous with the same intelligible source, what makes my soul mine rather than a moment of yours.
Plotinus's own answer, and on the Stanford Encyclopedia's reading his ultimate one, turns on perspective rather than location. Each soul, he suggests, is individuated by the particular vantage point from which it contemplates the intelligible beings, not by occupying a different place or having a numerically distinct substance, a solution the scholarly literature, including the work of Pavlos Kalligas, treats as Plotinus's considered resolution to the puzzle rather than an open question. Individuality becomes something like an angle of vision on a shared reality rather than a separate possession, a strikingly modern move that translates a metaphysical problem into a question about standpoint.
The stakes of the puzzle are not merely technical. Plotinus describes the self as amphibious, capable of directing its attention either toward the higher intelligible realities or toward the concerns of the body, with the I migrating between these poles depending on where the representational faculty, the phantasia, happens to be focused. A life spent absorbed in bodily cares is, on this account, a life in which the amphibious self has simply chosen, moment to moment, to dwell in its lower register, even though the higher register, the undescended soul, is never actually absent. Ordinary unawareness of this higher self does not mean it has gone anywhere. It means attention has drifted.
This is why the undescended soul is more than a curiosity of ancient metaphysics. It is Plotinus's attempt to explain how a being can be simultaneously fallen and unfallen, distracted and never truly lost, and it forces onto the table a question that has never fully closed for his later readers: whether identity is something a soul has prior to its point of view, or whether, as Plotinus himself was willing to argue, having a point of view is all that identity ever amounted to.