Greg Watercolouring

I've seen this man several times recently outside the central library painting. What caught my attention first is that he's on his knees in front of a low easel, doing very skilled drawings of St Peter Mancroft opposite. Decided to talk with him today. I asked : " how did he manage to maintain such a painfull position?". His response : " after a while I feel nothing " AHH, so that's why!.
Apparently the quote : " human beings cannot tolerate too much reality " is atributed to many : Lenin, Sartre, Blake. I'm saying it too : more on this soon.