The great poem of Dante, consisting of three compartments, "Inferno," "Purgatorio," and "Paradiso"; "three kingdoms ... Dante's World of Souls...; all three making up the true Unseen World, as it figured in the Christianity of the Middle Ages; a thing for ever memorable, for ever true in the essence of it, to all men ... but delineated in no human soul with such depth of veracity as in this of Dante's ... to the earnest soul of Dante it is all one visible fact—Hell, Purgatory, Paradise, with him not mere emblems, but indubitable awful realities." See Dante, and Carlyle's "Heroes and Hero-Worship."