The allegory back of these words is put forth in clear language by Maria F. Rossetti. "We need hardly to be told" she writes in her Shadow of Dante (pp. 112-13) "that the Gate of St. Peter is the Tribunal of Penance. The triple stair stands revealed as candid Confession mirroring the whole man, mournful Contrition breaking the hard heart of the gazer on the Cross, Love all aflame offering up in Satisfaction the lifeblood of body, soul, and spirit:--the adamantine threshold-seat as the priceless merits of Christ the Door, Christ the Rock, Christ the sure Foundation and the precious Corner-Stone. In the Angel of the Gate, as in the Gospel Angel of Bethesda, is discerned the Confessor; in the dazzling radiance of his countenance, the exceeding glory of the ministration of righteousness; in the penitential robe, the sympathetic meekness whereby, restoring one overtaken in a fault, he considers himself lest he also be tempted; in the sword, the wholesome severity of his discipline; in the golden key, his divine authority; in the silver, the discernment of spirits whereby he denies absolution to the impenitent, the learning and discretion whereby he directs the penitent." Dante's plan of Purgatorial punishment makes no distinction between the punishment put forth for unforgiven venial sin and that due in satisfaction for the violation of the moral order by one whose guilt has been remitted. Both partake of the same penalty. Is that because the poet thinks that if forgiveness is finally won by sorrow and suffering, expiation for the offence is still to be made? Or does he hold that the seven capital sins entailing temporal punishment either operate effectively in every soul, or exist at least radically according to the principle voiced by Hamilton Wright Mabie: "The man who slowly builds Heaven with him, has constantly the terrible knowledge that he has only to put his hand forth in another direction in order to build Hell?" In any event Dante, who shows in Hell how men are made sin eternally, in Purgatory exhibits the sinful disposition more or less under the control of the will, yet of such a nature that only the grace of God held the soul back from the Abyss. It must be purged of all tendency to evil so as to be made "pure and ready to mount to the stars." (XXXIII, 140.) The purgation is seen in process in a threefold manner according to Dante. A material punishment is inflicted to mortify the evil passion and to incite the soul to virtue; the soul meditates upon the capital sin and its opposite virtue, moved to abhorrence of the evil and to admiration of the good by examples drawn from sacred and profane history; vocal prayer is addressed to God and it brings forth grace to purify and strengthen the soul. Hard in the beginning is this work of repentance, but it becomes easy as the habit of virtue is formed.