please give me the central idea of "When I Set out Fore Lyonnesse"
This is a lyrical poem that was inspired by and describes the poet’s trip to Lyonnesse, the mythical birthplace of Sir Tristam who was an Arthurian knight. In reality the trip was made by the young poet to restore a church. When the poet returned from his stay at Lyonnesse all the people guessed speechlessly that he had a magical twinkle in his eyes. His face was radiant with a unique and deep glow. It was as if he had encountered something special and extraordinary that gave him this incomprehensible radiance.