George Steiner argued that a novel about this character is structured as a 
George Steiner argued that a novel about this character is structured as a string quartet, and that novel's four sections are named after the four classical elements. In another work, a woman tells this character "Bestir thee now" and commands him to make use of his "speech ornate" to help another character. At one point, this character convinces a giant to carry him to his destination after he is falsely told that there are (*) bridges which will get him there. He rescues another character from a leopard, a lion, and a she-wolf. The gates of Dis slam shut when this character tries to enter, shortly after he praises his companion for no longer showing pity towards sinners. Since this character is not allowed to enter Paradise, he is replaced by Beatrice. For 10 points, name this Roman poet who serves as Dante's guide in the Inferno.
George Steiner argued that a novel about this character is structured as a string quartet, and that novel's four sections are named after the four classical elements.