" The new artistic urge often led to cathedrals being left unfinished or, if finished, to their giving us the feeling, of which Goethe was the first to become conscious, that they are somehow incomplete, indeed impossible to complete, because in the process of endless, interminable development. This impulse into the unlimited, this inability to be content with any conclusion, comes out all the more clearly in the Passion plays because of their extreme naïvety. It is in the ‘drama of movement’ of the Middle Ages that its dynamic sense of life, its unrest, dissolving traditional modes of thought and feeling, its nominalistic turning to the multiplicity of changing and transitory particulars, are most directly apprehended. "

― Arnold Hauser , The Social History of Art, Volume 1: From Prehistoric Times to the Middle Ages