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

Librarian Note: There is more than one author with this name in the Goodreads database Thomas Taylor was an English translator and Neoplatonist, the first to translate into English the complete works of Aristotle and of Plato, as well as the Orphic fragments. He published prolifically for over 50 years.