The whole long Glaucus and Scylla episode filling the third book, and especially this its climax, has to many lovers and students of Keats proved a riddle hard of solution. And indeed at first reading the meaning of its strange incidents and imagery, beautiful as is much of the poetry in which they are told, looks obscure enough. Every definite clue to their interpretation seems to elude us as we lay hold of it, like the drowned man who sinks through the palsied grasp of Glaucus. But bearing in mind what we have recognized as the general scope and symbolic meaning of the poem, does not the main purport of the Glaucus book, on closer study, emerge clearly as something like this? The spirit touched with the divine beam of Cynthia--that is aspiring to and chosen for communion with essential Beauty--in other words the spirit of the Poet--must prepare itself for its high calling, first by purging away the selfishness of its private passion in sympathy with human loves and sorrows, and next by acquiring a full store alike of human experience and of philosophic thought and wisdom. Endymion, endowed by favour of the gods with the poetic gift and passion, has only begun to awaken to sympathy and acquire knowledge when he meets Glaucus, whose history has made him rich in all that Endymion yet lacks, including as it does the forfeiting of simple everyday life and usefulness for the exercise of a perilous superhuman gift; the desertion, under a spell of evil magic, of a pure for an impure love; the tremendous penalty which has to be paid for this plunge into sensual debasement; the painful acquisition of the gift of righteous magic, or knowledge of the secrets of nature and mysteries of life and death, by prolonged intensity of study, and the patient exercise of the duties of pious tenderness towards the bodies of the drowned. At the approach of Endymion the sage recognizes in him the predestined poet, and hastens to make over to him, as to one more divinely favoured than himself, all the dower of his dearly bought wisdom; in possession of which the poet is enabled to work miracles of joy and healing and to confer immortality on dead lovers.