John Parker 
Works of Dionysius the Areopagite [PDF ebook] 
Divine Names, Mystic Theology Letters, &C

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. Who passeth all understanding. God unknown is still the God of Dionysius, and He is still to be worshipped unknowingly. There is a tradition that Dionysius erected the altar in Athens to God unknown, as author of the inexplicable darkness, which he observed in Egypt, and found afterwards from St. Paul to have been contemporaneous with the Crucifixion. Did St. Paul adapt his discourse at Athens to the conversion of Dionysius?