Select works of Plotinus

by Plotinus

(...)"speculation has so largely developed during the last twenty years that a demand for books treating of Neoplatonism and kindred subjects is steadily increasing.
Now of Neoplatonism Plotinus was the coryphaeus, if not the founder. What Plato was to Socrates, Plotinus was to his master, Ammonius Saccas. Neither Socrates nor Ammonius committed anything to writing; Plato and Plotinus were the great expounders of the tenets of their respective schools, and, as far as we can judge, far transcended their teachers in brilliancy of genius. Therefore, to the student of Neoplatonism,
the works of Plotinus are the most indispensable document, and the basis of the whole system. Just as no Platonic philosopher transcended the genius of Plato, so no Neoplatonic philosopher surpassed the genius of Plotinus.(...)"

418 pages, Kindle Edition

First published March 8, 1994

About the author

Egyptian-born Roman philosopher Plotinus and his successors in the 3rd century at Alexandria founded and developed Neoplatonism, a philosophical system, which, based on Platonism with elements of mysticism and some Judaic and Christian concepts, posits a single source from which all existence emanates and with which one mystically can unite an individual soul; The Enneads collects his writings.

Saint Thomas Aquinas combined elements of this system and other philosophy within a context of Christian thought.

People widely consider this major of the ancient world alongside Ammonius Saccas, his teacher.
He influenced in late antiquity. Much of our biographical information about Plotinus comes from preface of Porphyry to his edition. His metaphysical writings inspired centuries of pagan, Islamic, and Gnostic metaphysicians and mystics.

https://en.wikipedia.org/wiki/Plotinus