All writers all artists of any kind in so far as they have had any philosophical or critical power perhaps just in so far as they have been deliberate artists at all have had some philosophy some criticism of their art; and it has often been this philoso­phy or this criticism that has evoked their most startling inspi­ration calling into outer life some portion of the divine life of the buried reality which could alone extinguish in the emotions what their philosophy or their criticism would extinguish in the intellect.W. B. Yeats