In later times Orphic theology engaged the attention of Greek philosophersEudemus the Peripatetic, Chrysippus the Stoic, and Proclus the Neoplatonist, but it was an especially favourite study of the grammarians of Alexandria, where it became so intermixed with Egyptian elements that Orpheus came to be looked upon as the founder of mysticism.
But this is only to say again that Erigena is more of a Neoplatonist than a Scholastic. Hence Cousin suggested in respect of this point a threefold chronological division - at the outset the absolute subordination of philosophy to theology, then the period of their alliance, and finally the beginning of their separation.
Porphyry, the Neoplatonist, the disciple of Plotinus, was an unknown personage to those early students of the Isagoge.
While still a youth (393) he went with his brother Euoptius to Alexandria, where he became an enthusiastic Neoplatonist and disciple of Hypatia.
Hence the ancient religions of the East had a peculiar interest for the Neoplatonist.