1998, Elena Surkova, The Theological, Philosophical and Linguistic Background of Constantine the Philosopher's Concept of Translation Jože Krašovec (editor), The Interpretation of the Bible: The International Symposium in Slovenia, Journal for the Study of the Old Testament, Sheffield Academic Press, page 978, The reference-points for Constantine the Philosopher in creating his philosophy of language were: 1. the corpus of texts known under the name of the Epistles of Paul the Apostle and 2. Areopagitics—the writings which appeared in Byzantium in the second half of the 5th century, written by Dionysius the Areopagite (or more exactly, Pseudo-Dionysius), whose programme, in Sergey Averintzev's words, represents a "synthesis of the attic tradition of speculation with the Christian mysticism of Paul the Apostle's Epistles […] ."
Source: wiktionary