Oh, how few are perfect, and how few do penance in proportion to their sins! How few, in their dealing with their fellow-men, giving measure for measure, goods equal to the money paid for them, or services equal to the pay received! How many fail in charity, in words and actions! How many prayers said carelessly and without thought, even at the most solemn times! These will have to be repeated, as it were, in Purgatory. How many will suffer from their want of charity and mercy to the poor, and failing to pay their just dues to God's Church for the spiritual favors they receive from it! "If we give you," says St. Paul, "spiritual things, you should administer to us temporal things."…
All spiritual writers agree that the pains of Purgatory are intense, yet the souls are satisfied to suffer till the last debt is paid. They would not wish to enter Heaven with stains on their souls. God, in His great mercy, has permitted some souls suffering in Purgatory to appear to friends on earth to solicit their prayers and Masses, and to pay their debts. This the Lives of the Saints and Ecclesiastical History at all times attest. In these days when faith is fading from some minds, even in the Church, it behooves especially the Bishops to remind the faithful of their duties and obligations to their departed friends. It is thought by some that an expensive funeral, with its many carriages, and a grand monument over the grave, will satisfy all the requirements of decency and of family love. Alas! if the dead could only speak from their graves, they would cry out and say, "All these monuments and this worldly pageantry only crush us. They only satisfy the vanity of the living, but in no way alleviate our sufferings in Purgatory."…
But the Bishops must, from time to time, remind the people of their duty towards God's servants suffering in Purgatory. In olden times, when faith, love, and affection were stronger than now, devotion towards the souls in Purgatory showed itself in numerous foundations in favor of the souls in Purgatory. Churches and canonries where Masses were celebrated every day by canons and monks, benefices for the education of poor students, hospitals for the care of the sick, periodical distribution of alms to the poor, to have rosaries and other prayers said and pilgrimages made for the souls in Purgatory. All these have been swept away by the ruthless hand of the civil power, wishing to reform the Church; and even at the present day, when the Christian soul is about to appear before the judgment-seat, there are legal impediments in the way of his making by will donations for prayers or Masses. Therefore, my dear people, whilst you are well make provision for your own soul. Do not entrust it to the care of others who cannot love you more than you love yourselves.
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This doctrine of Purgatory has always been taught in the Church and handed down from bishops and priests to their successors in the sacred ministry, and by the voice of the people. "Stand fast, and hold the tradition you have learned, whether by word or by our epistle." (II. Thess. ii. 14.) Now prayers and Masses for the dead are to be found in every ancient liturgy of the Church. There is no Oriental liturgy without prayers for those who have departed in peace. The Apostolic Constitutions—the most ancient and genuine work—speak largely of prayers for the dead, for the conversion of sinners.
There are religious congregations and pious associations specially devoted to the relief of the souls in Purgatory. St. Vincent de Paul ordered the priests of his congregation never to go to meals without first saying the De Profundis for the souls in Purgatory. The Church ends all the prayers of the divine office with: "May the souls of the faithful departed, through the mercy of God, rest in peace." One may turn away with a sad thought from a tomb on which is not engraved: "May he rest in peace," or on which a cross—the emblem of our hope in God and in a happy resurrection—does not figure.
We exhort you, beloved children in Christ, to entertain an earnest charity towards the souls in Purgatory. You loved them during life; do not let it be said: "Out of sight, out of mind." Love them in death or, living, wishing earnestly to go to God. This charity will greatly help yourselves. If a cup of cold water given to a servant of God shall not go without its reward, how much more a cup of celestial grace, that will shorten the time in the flames of Purgatory of a soul that most ardently longs to see God, who desires it Himself with great love, and will reward those who shorten the exile of His dear servants. "Those," says St. Alphonsus Liguori, "who succor the souls in Purgatory will be succored in turn by the gratitude of those whom they have relieved, and who enjoy sooner, by their prayers, the beatific vision of God."
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The Council of Trent, under the inspiration of the Holy Ghost, has made decrees on the subject which bind the consciences of the faithful. In the Thirteenth Canon of the Sixth Session it decrees "that if any one should say that a repentant sinner, after having received the grace of justification, the punishment of eternal pains being remitted, has no temporary punishment to be suffered, either in this life or in the next, in Purgatory, before he can enter into the Kingdom of God, let him be anathema."
Though King David was assured, after his sincere repentance, that his sin was forgiven, yet the Prophet told him that he had still to suffer by the death of his child.