II. His Ruling Symbols from The Philosophy of Shelley’s Poetry in Ideas of Good and Evil by William Butler Yeats.

“Again and again one finds some passing allusion to the cave of man’s mind, or to the caves of his youth, or to the cave of mysteries we enter at death, for to Shelley as to Porphyry it is more than an image of life in the world.” [via]

Consider also:

  1. “I have sailed down mighty rivers and seen the sun rise and set and the stars come forth whilst I sailed night and day down a rapid stream among mountains.”
  2. “It may be that his subconscious life seized upon some passing scene, and moulded it into an ancient symbol without help from anything but that great memory; but so good a Platonist as Shelley could hardly have thought of any cave as a symbol, without thinking of Plato’s cave that was the world; and so good a scholar may well have had Porphyry on ‘the Cave of the Nymphs’ in his mind.”
  3. “Shelley compares the flowing through our mind of ‘the universe of things,’ which are, he has explained elsewhere, but thoughts, to the flowing of the Arne through the ravine, and compares the unknown sources of our thoughts in some ‘remoter world’ whose ‘gleams’ ‘visit the soul in sleep,’ to Arne’s sources among the glaciers on the mountain heights.”
  4. “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.”
  5. “in the Ode to Liberty, Liberty is bid lead wisdom out of the inmost cave of man’s mind as the Morning Star leads the sun out of the waves.”