Context : This is one of the most pathetic poems written by Shelley. He wrote this poem before one year of his death. Every word of it is charged with an in describable feeling of regret and disappointment. He regrets that his youthful vigour and joys of life will not return to him any more.
Explanation : In this concluding stanza the poet feels that his days and nights are dull and joyless. The joys of his life have disappeared from his entire life. The beauties of nature which used to fill him with joy in the past now only add to his sorrow and disappointment. Instead of sending a thrill of delight into his heart, they only intensify his grief. He asks to himself whether he would ever get that delight or not. At once his soul answers that joy has gone forever and never to return.
