As Vergil had surpassed Homer by adapting the epic form to celebrate the origin of the author's nation, Milton developed it yet further to recount the origin of the human race itself and, in particular, the origin of and the remedy for evil; this is what he refers to as "things unattempted yet in prose or rhyme." After a statement of its purpose, the poem plunges, like its epic predecessors, into the midst of the action, shockingly bringing to the front the traditional visit to the underworld, for Satan's malice is the mainspring of the negative action.