Virgil now assures him that, thanks to Santa Lucia (type of God’s grace), he has in sleep been conveyed to the very entrance of Purgatory.  Gazing at the high cliffs which encircle the mountain, Dante now perceives a deep cleft, through which he and Virgil arrive at a vast portal (the gate of penitence), to which three huge steps of varying color and size afford access.  At the top of these steps, on a diamond threshold, sits the Angel of Absolution with his flashing sword.  Challenged by this warder, Virgil explains that they have been guided hither by Santa Lucia, at whose name the angel bids them draw near.  Up a polished step of white marble (which typifies sincerity), a dark step of cracked stone (symbol of contrition), and one of red porphyry (emblem of self-sacrifice), Dante arrives at the angel’s feet and humbly begs him to unbar the door.  In reply the angel inscribes upon the poet’s brow, by means of his sword, seven P’s, to represent the seven deadly sins (in Italian peccata), of which mortals must be purged ere they can enter Paradise.

After bidding Dante have these signs properly effaced, the angel draws from beneath his ash-hued mantle the golden key of authority and the silver key of discernment, stating that when St. Peter entrusted them to his keeping he bade him err “rather in opening than in keeping fast.”  Then, the gate open, the angel bids them enter, adding the solemn warning “he forth again departs who looks behind.”

Canto X. Mindful of this caution, Dante does not turn, although the gates close with a clash behind him, but follows his guide along a steep pathway.  It is only after painful exertions they reach the first terrace of Purgatory, or place where the sin of pride is punished.  They now pass along a white marble cornice,—­some eighteen feet wide,—­whose walls are decorated with sculptures which would not have shamed the best masters of Greek art.  Here are represented such subjects as the Annunciation, David dancing before the Ark, and Trajan granting the petition of the unfortunate widow.  Proceeding along this path, they soon see a procession of spirits approaching, all bent almost double beneath huge burdens.  As they creep along, one or another gasps from time to time, “I can endure no more.”

Canto XI. The oppressed spirits fervently pray for aid and forgiveness, while continuing their weary tramp around this cornice, where they do penance for undue pride.  Praying they may soon be delivered, Virgil inquires of them where he can find means to ascend to the next circle, and is told to accompany the procession which will soon pass the place.  The speaker, although unable to raise his head, confesses his arrogance while on earth so incensed his fellow-creatures that they finally rose up against him and murdered him.  Stooping so as to catch a glimpse of the bent face, Dante realizes he is talking to a miniature painter who claimed to be without equal, and therefore has to do penance.