Though I don't know anything about his affiliated ministry I found his historical perspective on the Christian Mystic informative. 3 points I would Highlight I thought were significant.
(1) I liked his perspective of mysticism being more of an experimental Journey rather than a theological journey. My own thoughts on this are that though this really should be any Christian's Journey it is a peculiar trait of mysticism to lose oneself in order to find themselves again in God. Mystic really comes from the word mystery. The ways of God are a mystery. The mystic tells the story of being hurled into an enigma he or she doesn't even entirely understand in order for the Mystery of who God really is to be revealed. In other words as their own life becomes more of an enigma and a mystery to them, the reality of who God is becomes brighter. The darkness leads to light.
(2) His perspective that God raised up mystics at periods of history where man and his wisdom are going through a great transformation of flowering "enlightenment" and advances was intriguing to me. Is there any more flowering advanced time than the day in which we live? But alas man has his wisdom God has His. Perhaps this is why there is an interest in mysticism today? Perhaps we are in one of these periods described. I have always thought the mystic had his own peculiar prophetic voice of His day. The prophets role was never centered on predicting the future. It was always centered on the cross and calling the people back into a right cross centered relationship with God that emptied them of all the error, and worldliness and spiritual death they found themselves in. To me this is also at the heart of what the role of mysticism is.
(3) Finally, I am very glad he brought up the Desert Fathers and their role in Mysticism. For in the Post Christ AD and Early Church World this is where the roots of mysticism begin. So disturbed with the corruption of 4th century Rome, under the Christianization of the Roman Empire by Constantine, they like Christ went outside the Camp alone. They found it more disturbing when the world became a part of Christianity than when it was persecuting it. It was almost to the point with them where the whole thing had to go down into the ground and die again to be brought back up by God anew. It is where I find myself these days. I don't consider myself protestant or catholic or charismatic, or Lutheran or traditional or this or that or so on. I consider myself a brother like they that had to go outside the camp of it all to pray it be brought up anew. What matters most to me is do I hear the Spirit of the Lord in this person? That is what brings me into fellowship with someone. If I hear that it matters little to me what they are in name or anything else. So I think for a Forum like this to work, we would have to throw off who we are in name. Leave "Our Church's" at the door so to speak and meet each other in who we are in Christ. The Mystery of Who He is and our search thereof. IMHO