Purification begins only after the soul passes into Purgatory proper. At the entrance is St. Peter's gate, guarded by an angel, who, with his sword inscribes on the brow of the penitent seven times the letter P, the first letter of the word Peccatum, signifying sin. These seven P's, outward signs of inward evil, represent the seven capital sins, the P's of which are removed in succession by an angel as penance is done for each sin on its corresponding terrace. The seven terraces which run around the mountain, rise in succession with lessening circuit as ascent is made, their width being about seventeen or eighteen feet. Connecting each terrace and cut out of solid rock is a narrow stairway, guarded by an angel. The steps of each successive stairway become less steep as each terrace is attained. Crowning the mountain is the Garden of Eden, lonely and deserted since Adam and Eve, after six hours of occupancy, were forced from its confines. Its herbage is still luxuriant, its flowers endless and fragrant, its trees, melodious with birds, rustle with the balmy wind, its waters serve to irrigate the garden as well as to help the soul. These waters, the rivers Lethe and Eunoe, are produced from heavenly sources and have miraculous powers. The former removes the memory of sin; the latter restores the recollection of virtuous deeds, a poetical way of expressing the Catholic dogma, that with the revival of grace in the heart of the converted sinner comes back the merit that had been acquired by moral acts. The problem which Dante sets out to solve in his Purgatory is this: Assuming that the sinner has been baptized, how can he break his shackles and attain to the liberty of the children of God? The literal narrative of Dante's Purgatory presupposing that the soul at the hour of death is in the state of grace, now shows us that soul working towards perfection by way of expiation for unforgiven venial sin and for the temporal punishment due to sin. It is the only way by which it can again attain its pristine dignity. "And to his dignity he never returns," says Dante, "unless where sin makes void, he fill up for evil pleasures just penalties." The rule holds good, also, for salvation in this world. The thin veil of allegory enables us to penetrate Dante's teaching that this life also is a Purgatory, and here, too, we may cast off the defilement of sin by means of repentance and expiation. But first the soul must be girt with the rush of humility, and have perfect contrition represented by its being washed with the dew, the moisture that descends from Heaven. To Virgil (Reason guided by Heaven) says Cato (the symbol of Liberty), "Go, then, and see that thou gird this man with a smooth rush and that thou wash his face (with dew) so that thou efface from it all foulness, for it would not be fitting to go into the presence of the first Minister, who is of those of Paradise, with eyes dimmed by any mist." (1, 95.)