Dionysius the Areopagite; The Divine Names; and The Mystical Theology
C. E. Rolt
Kessinger Publishing
1920. Dionysius was St. Paul's Athenian convert.  Here is neo-Platonism at its best!  Chapters:  About Dionysius; His Leading Ideas; The Nature of the Godhead in Itself; Its Relation to Creation; The Problem of Evil; Contemplation; Dionysius and Modern Philosophy; The Psychology of Contemplation; The Scriptural Basis of His Doctrines; Conclusion; Bibliography.