Plotinos: Complete Works, v. 4 In Chronological Order,...

His epilepsy naturally created an opportunity for, and need of a doctrine of ecstasy; which for normal people should be no more than a doctrine, or at least be limited to conscious experiences. Even his admirer, Porphyry, acknowledges that he spelled and pronounced incorrectly.750 He acknowledged that without Porphyry's objections he would have nothing to say. He refrained from quoting his authorities, and Porphyry acknowledged that his writings contained many Stoic and Aristotelian doctrines. It was generally bruited around that his doctrines were borrowed from Numenius,751 to the extent that his disciples held controversies, and wrote books on the subject. His style is enigmatic, and the difficulty of understanding him was discussed even in his own day. He was dependent on secretaries or editors; first on Amelius, later on Porphyry, who does not scruple to acknowledge he added many explanations.752 Later, Plotinos sent his books to Porphyry in Sicily to edit. No doubt the defectiveness of his eyesight made both reading and writing difficult, and explains his failure to put titles to his works; though, as in the case of Virgil, such hesitation may have been the result of a secret consciousness of his indebtedness to others.