Virgil — "Facilis descensus Averno: Noctes atque dies patet atri ianua Ditis; Sed revocare…"
Facilis descensus Averno: Noctes atque dies patet atri ianua Ditis; Sed revocare gradium superasque evadere ad auras, Hoc opus, hic labor est. (The gates of Hell are open night and day; Smooth the descent, and easy is the way: But to return, and view the cheerful skies, In this the task and mighty labor lies.)
