_Canto XXIII._ Dante is still dumbly staring at the mysterious tree when Virgil bids him follow, for they still have far to go. They next meet weeping, hollow-eyed spirits, so emaciated that their bones start through their skin. One of these recognizes Dante, who is aghast that his friend Forese should be in such a state and escorted by two skeleton spirits. Forese replies that he and his companions are consumed by endless hunger and thirst, although they eat and drink without ever being satisfied. When Dante expresses surprise because a man only five years dead should already be so high up the mount of Purgatory, Forese explains that his wife's constant prayers have successively freed him from detention in the other circles. In return Dante states why he is here and names his companions. _Canto XXIV._ Escorting the three travellers on their way, Forese inquires what has become of his sister, Piccarda, ere he points out sundry spirits, with whom Dante converses, and who predict the coming downfall of his political foes. But these spirits suddenly leave Dante to dart toward trees, which tantalizingly withold their fruit from their eager hands, while hidden voices loudly extol temperance. _Canto XXV._ In single file the three poets continue their tramp, commenting on what they have seen, and Statius expounds his theories of life. Then they ascend to the seventh ledge, where glowing fires purge mortals of all sensuality. Even as they toil toward this level, an angel voice extols chastity, and Dante once more feels the light touch which he now associates with the removal of one of the scars made by the angel at the entrance of Purgatory. Arrived above, the poets have to tread a narrow path between the roaring fires and the abyss. So narrow is the way, that Virgil bids Dante beware or he will be lost! "Behoved us, one by one, along the side, That border'd on the void, to pass; and I Fear'd on one hand the fire, on the other fear'd Headlong to fall: when thus the instructor warn'd: 'Strict rein must in this place direct the eyes. A little swerving and the way is lost.'" As all three warily proceed, Dante hears voices in the fiery furnace alternately imploring the mercy of God and quoting examples of chastity, such as Mary and Diana, and couples who proved chaste though married.