The thing that impressed me about the Extreme Pilgrim video (the second one above) is that it shows how hard it is to be completely isolated in the middle of the desert. It's been a while since I watched it, but if I recall correctly, the Anglican priest in the video who lived just a little while in Fr. Lazaros' cell, could barely take it. It makes you realize how close to God Fr. Lazaros must be to live that kind of a life all the time. It's truly remarkable. I could never do it.