There were at least two avenues for originality open to Plotinus, even if it was not his intention to say fundamentally new things. The first was in trying to say what Plato meant on the basis of what he wrote or said or what others reported him to have said. This was the task of exploring the philosophical position that we happen to call "Platonism". The second was in defending Plato against those who, Plotinus thought, had misunderstood him and therefore unfairly criticized him. Plotinus found himself, especially as a teacher, taking up these two avenues. His originality must be sought for by following his path.
--
Lloyd P. Gerson in "Plotinus" at Stanford Encyclopedia of PhilosophyPlotinus
The three basic principles of Plotinus' metaphysics are called by him "the One" (or, equivalently, "the Good"), Intellect, and Soul (see V 1; V 9.). These principles are both ultimate ontological realities and explanatory principles. Plotinus believed that they were recognized by Plato as such, as well as by the entire subsequent Platonic tradition.
The One is the absolutely simple first principle of all. It is both "self-caused" and the cause of being for everything else in the universe. There are, according to Plotinus, various ways of showing the necessity of positing such a principle.Plotinus
The synthetic genius of Plotinus enabled him to weave into his system valuable elements from Aristotle and the Stoics. But he was above all a Platonist. He presents the spiritual triad: the One, the Mind, the Soul. From the One comes the Mind, that is, the Nous, which embraces the totality of the knowable or intelligible, to wit, the Cosmos of Ideas. From that, come the Soul of the World and the souls of men. Matter, which is no-thing, gains form and partial reality when informed with soul. Plotinus's attitude toward knowledge of the concrete natural or historic fact, displays a transcendental indifference exceeding that of Plato. Perceptible facts with him are but half-real manifestations of the informing spirit. They were quite plastic, malleable, reducible. Moreover, thoughts of the evil of the multiple world of sense held for Plotinus and his followers a bitterness of ethical unreality which Plato was too great an Athenian to feel.
Plotinus
The "concept" of the One is not, properly speaking, a concept at all, since it is never explicitly defined by Plotinus, yet it is nevertheless the foundation and grandest expression of his philosophy. Plotinus does make it clear that no words can do justice to the power of the One; even the name, "the One," is inadequate, for naming already implies discursive knowledge, and since discursive knowledge divides or separates its objects in order to make them intelligible, the One cannot be known through the process of discursive reasoning (Ennead VI.9.4). Knowledge of the One is achieved through the experience of its "power" (dunamis) and its nature, which is to provide a "foundation" (arkhe) and location (topos) for all existents (VI.9.6). The "power" of the One is not a power in the sense of physical or even mental action; the power of the One, as Plotinus speaks of it, is to be understood as the only adequate description of the "manifestation" of a supreme principle that, by its very nature, transcends all predication and discursive understanding.
Plotinus
Plotinus
Plutarch
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z