Evil = Absence of Good => A Grave Error?
"Why do you think I treat man like an "it" or a "muppet" (or better said a puppet)? That God is incomprehensible in His essence is true, and asserted by several mystics/saints. Lossky in his Mystical Theology of the Eastern Church also asserts it if I remember correctly. Now what does this have to do with man being an it or a muppet?"
I explained this in the above post. It is the natural consequence of how you take from the mystics without really caring about what they intended to achieve.
"I've read quite a bit of Augustine, which passages are you referring to and which works?"
Confessions. He speaks about how for God, evil doesnt exist. Not for God, nor for his creation when viewed as a whole. Because nothing outside or within can break his order. Something can only be "counted" as evil for another, because two parts might not fit each other. But that which in this is evil, it is wrong (perhaps blasphemous, at least a sin) for us to call evil according to Augustine, because that which is evil in one way, harmonizes with something else and is in itself therefore good. And all parts that doesnt harmonize with each other can though harmonize with the "lower part", which is in harmony with something greater. This is part of what you dont quite seem to grasp.