Have you ever read the Divine Names by +Dionysius the Areopagite? This master of apophatic theology lists many names by which people have described their experience of God's revelation of himself. But none, taken singly or all together, exhausts the nature of God.
Up until this point I have not. However, I have spent part of today reading this work (about 3/4 of it actually) per your recommendation. I find the work to be very vague and Platonic. He dwells on the good, love, beauty of God but fails to balance this with God's other attributes of justice, jealousy, and wrath.
According to this work, there is no evil-not even among demons (please see Section XXIII) where he states:
"If you then, being evil, know how to give good gifts to your children..." Matt 7:11 "...and the evil man brings out of his evil treasure what is evil." Matt 12:34 "...for their deeds were evil. For everyone who does evil hates the Light. Jn 3:19 I do not ask You to take them out of the wold, but to keep them from the evil one. Jn 17:15 (Notice the direct contradiction to Dionysius' assertion that the demons are not evil to our Lord Jesus' statement.)
"...for He causes His sun to rise on the evil and the good..." Matt 5:45
With all due respects for +Dionysius, I would have to strongly disagree with his statement:
If any would like to read this material it can be found here -> Dionysius and Form of the Good