The theme of reunion begins, as Dante meets his dead friend Casella. Casella, a musician, performs a poem by Dante that he has set to music, until they are interrupted by Cato, who tells them to stop wasting time. Art can be redemptive or escapist depending on how it is used. At the top of the mountain, Virgil tells Dante he has achieved the only true freedom, which is internal and disciplined, not a mere absence of external rules.