For instance, spirits newly arrived in hell require no devil with his prong to drive them to their punishment. They flit towards it eagerly, of their own accord.[15] Similarly, the souls in purgatory are kept by their own will at the penance they are doing. No external force retains them, but until they are quite purged they are not able, because they are not willing, to absolve themselves.[16] The whole mountain, we are told, trembles and bursts into psalmody when any one frees himself and reaches heaven. Is it too much of a gloss to say that these souls change their prison when they change their ideal, and that an inferior state of soul is its own purgatory, and determines its own duration? In one place, at any rate, Dante proclaims the intrinsic nature of punishment in express terms. Among the blasphemers is a certain king of Thebes, who defied the thunderbolts of Jupiter. He shows himself indifferent to his punishment and says: “Such as I was alive, such I am dead.” Whereupon Virgil exclaims, with a force Dante had never found in his voice before: “In that thy pride is not mortified, thou art punished the more. No torture, other than thy own rage, would be woe enough to match thy fury.”[17] And indeed, Dante’s imagination cannot outdo, it cannot even equal, the horrors which men have brought upon themselves in this world. If we were to choose the most fearful of the scenes in the _Inferno_, we should have to choose the story of Ugolino, but this is only a pale recital of what Pisa had actually witnessed. A more subtle and interesting instance, if a less obvious one, may be found in the punishment of Paolo and Francesca di Rimini. What makes these lovers so wretched in the Inferno? They are still together. Can an eternity of floating on the wind, in each other’s arms, be a punishment for lovers? That is just what their passion, if left to speak for itself, would have chosen. It is what passion stops at, and would gladly prolong for ever. Divine judgement has only taken it at its word. This fate is precisely what Aucassin, in the well-known tale, wishes for himself and his sweetheart Nicolette,--not a heaven to be won by renunciation, but the possession, even if it be in hell, of what he loves and fancies. And a great romantic poet, Alfred de Musset, actually upbraids Dante for not seeing that such an eternal destiny as he has assigned to Paolo and Francesca would be not the ruin of their love,[18] but the perfect fulfilment of it. This last seems to be very true; but did Dante overlook the truth of it? If so, what instinct guided him to choose just the fate for these lovers that they would have chosen for themselves?