Neoplatonism

(noun) a system of philosophical and theological doctrines composed of elements of Platonism and Aristotelianism and oriental mysticism; its most distinctive doctrine holds that the first principle and source of reality transcends being and thought and is naturally unknowable. Examples: "Neoplatonism was predominant in pagan europe until the 6th century." "Neoplatonism was a major influence on early christian writers and on later medieval and renaissance thought and on islamic philosophy."