II. His Ruling Symbols from The Philosophy of Shelley’s Poetry in Ideas of Good and Evil by William Butler Yeats.
“It is only by ancient symbols, by symbols that have numberless meanings beside the one or two the writer lays an emphasis upon, or the half-score he knows of, that any highly subjective art can escape from the barrenness and shallowness of a too conscious arrangement, into the abundance and depth of nature.” [via]