difficult to say

Now you may say to be that prose can do it, and you may quote to me the end of the Pilgrim's Progress, a very remarkable piece of writing. Or, better still, as we shall be more agreed upon it, the general impression left upon the mind by the book which set me writing - Mr. Hudson's Crystal Age. I do not deny that prose can do it, but when it does it, it is hardly to be called prose, for it is inspired. Note carefully the passages in which the trick is worked in prose (for instance, in the story of Ruth in the Bible, where it is done with complete success), you still perceive an incantation and a spell. Indeed this same episode of Ruth in exile has inspired two splendid passages of European verse, of which it is difficult to say which is the more national, and therefore the greatest, Victor Hugo's in the Legende des Siecles or Keats's astounding four lines.