William Blake and the Imagination in Ideas of Good and Evil by William Butler Yeats.

“But when one reads Blake, it is as though the spray of an inexhaustible fountain of beauty was blown into our faces, and not merely when one reads the Songs of Innocence, or the lyrics he wished to call ‘The Ideas of Good and Evil,’ but when one reads those ‘Prophetic Works’ in which he spoke confusedly and obscurely because he spoke of things for whose speaking he could find no models in the world about him.” [via]

Consider also:

  1. “William Blake was one of these men, and if he spoke confusedly and obscurely it was because he spoke things for whose speaking he could find no models in the world about him.”
  2. “I think this mysterious song utters a faith as simple and as ancient as the faith of those country people, in a form suited to a new age, that will understand, with Blake, that the holy spirit is ‘an intellectual fountain,’ and that the kinds and degrees of beauty are the images of its authority.”
  3. “We write of great writers, even of writers whose beauty would once have seemed an unholy beauty, with rapt sentences like those our fathers kept for the beatitudes and mysteries of the Church; and no matter what we believe with our lips, we believe with our hearts that beautiful things, as Browning said in his one prose essay that was not in verse, have ‘lain burningly on the Divine hand,’ and that when time has begun to wither, the Divine hand will fall heavily on bad taste and vulgarity.”
  4. “There is hardly indeed a poem of any length in which one does not find it as a symbol of love, or liberty, or wisdom, or beauty, or of some other expression of that Intellectual Beauty, which was to Shelley’s mind the central power of the world; and to its faint and fleeting light he offers up all desires”
  5. “In ancient times, it seems to me that Blake, who for all his protest was glad to be alive, and ever spoke of his gladness, would have worshipped in some chapel of the Sun, and that Keats, who accepted life gladly though ‘with a delicious diligent indolence,’ would have worshipped in some chapel of the Moon, but that Shelley, who hated life because he sought ‘more in life than any understood,’ would have wandered, lost in a ceaseless reverie, in some chapel of the Star of infinite desire.”