Plotinus he had attempted to deepen his knowledge of the exotic philos — Peter Brown

"Plotinus he had attempted to deepen his knowledge of the exotic philosophy of the Persians and Indians. Only later in life did he indulge, with ever greater tranquility, in Platos ancient dialectics. The appeal of his writings comes from being the work of a troubled and anxious man who found his way through harsh, rational discipline and achieved calm and clarity in adulthood. (Part 1, chapter II, p. 57)"