Scripture:
Mt 9:12-13
11 The Pharisees saw this and said to his disciples, “Why does your teacher144 eat with tax collectors and sinners?”
12 He heard this and said, “Those who are well do not need a physician, but the sick do.
Catechism of The Catholic Church
III. The Final Purification, or Purgatory
1030 All who die in God’s grace and friendship, but still imperfectly purified, are indeed assured of their eternal salvation; but after death they undergo purification, so as to achieve the holiness necessary to enter the joy of heaven.
1031 The Church gives the name Purgatory to this final purification of the elect, which is entirely different from the punishment of the damned. The Church formulated her doctrine of faith on Purgatory especially at the Councils of Florence and Trent. The tradition of the Church, by reference to certain texts of Scripture, speaks of a cleansing fire: As for certain lesser faults, we must believe that, before the Final Judgment, there is a purifying fire. He who is truth says that whoever utters blasphemy against the Holy Spirit will be pardoned neither in this age nor in the age to come. From this sentence we understand that certain offenses can be forgiven in this age, but certain others in the age to come
1032 This teaching is also based on the practice of prayer for the dead, already mentioned in Sacred Scripture: “Therefore [Judas Maccabeus] made atonement for the dead, that they might be delivered from their sin.” From the beginning the Church has honored the memory of the dead and offered prayers in suffrage for them, above all the Eucharistic sacrifice, so that, thus purified, they may attain the beatific vision of God. The Church also commends almsgiving, indulgences, and works of penance undertaken on behalf of the dead: Let us help and commemorate them. If Job’s sons were purified by their father’s sacrifice, why would we doubt that our offerings for the dead bring them some consolation? Let us not hesitate to help those who have died and to offer our prayers for them.
Diary of Saint Faustina
723 Today, I heard these words: The graces I grant you are not for you alone, but for a great number of other souls as well… And your heart is My constant dwelling place, despite the misery that you are. I unite Myself with you, take away your misery and give you My mercy. I perform works of mercy in every soul. The greater the sinner, the greater the right he has to My mercy. My mercy is confirmed in every work of My hands. He who trusts in My mercy will not perish, for all his affairs are Mine, and his enemies will be shattered at the base of My footstool.
1146 [Let] the greatest sinners place their trust in My mercy. They have the right before others to trust in the abyss of My mercy. My daughter, write about My mercy towards tormented souls. Souls that make an appeal to My mercy delight Me. To such souls I grant even more graces than they ask. I cannot punish even the greatest sinner if he makes an appeal to My compassion, but on the contrary, I justify him in My unfathomable and inscrutable mercy. Write: before I come as a just Judge, I first open wide the door of My mercy. He who refuses to pass through the door of My justice…
1275 My Secretary, write that I am more generous toward sinners than toward the just. It was for their sake that I came down from heaven; it was for their sake that My Blood was spilled. Let them not fear to approach Me; they are most in need of My mercy.
1396 Today I heard a voice in my soul: Oh, if sinners knew My mercy, they would not perish in such great numbers. Tell sinful souls not to be afraid to approach Me; speak to them of My great mercy.
1397 The Lord said to me, The loss of each soul plunges Me into mortal sadness. You always console Me when you pray for sinners. The prayer most pleasing to Me is prayer for the conversion of sinners. Know, My daughter, that this prayer is always heard and answered.
1521 The Lord said to me, My daughter, do not tire of proclaiming My mercy. In this way you will refresh this Heart of Mine, which burns with a flame of pity for sinners. Tell My priests that hardened sinners will repent on hearing their words when they speak about My unfathomable mercy, about the compassion I have for them in My Heart. To priests who proclaim and extol My mercy, I will give wondrous power; I will anoint their words and touch the hearts of those to whom they will speak.
1541 My daughter, encourage souls to say the chaplet which I have given to you. It pleases Me to grant everything they ask of Me by saying the chaplet. When hardened sinners say it, I will fill their souls with peace, and the hour of their death will be a happy one. Write this for the benefit of distressed souls; when a soul sees and realizes the gravity of it sins, when the whole abyss of the misery into which it immersed itself is displayed before its eyes, let it not despair, but with trust let it throw itself into the arms of My mercy, as a child into the arms of its beloved mother. These souls (125) have a right of priority to My Compassionate Heart, they have first access to My mercy. Tell them that no soul that has called upon My mercy has been disappointed or brought to shame. I delight particularly in a soul which has placed its trust in My goodness. Write that when they say this chaplet in the presence of the dying, I will stand between My Father and the dying person, not as the just Judge but as the merciful Savior.
1602 Today the Lord said to me, Daughter, when you go to confession, to this fountain of My mercy, the Blood and Water which came forth from My Heart always flows down upon your soul and ennobles it. Every time you go to confession, immerse yourself entirely in My mercy, with great trust, so that I may pour the bounty of My grace upon your soul. When you approach the confessional, know this, that I Myself am waiting there for you. I am only hidden by the priest, but I Myself act in your soul. Here the misery of the soul meets the God of mercy. Tell souls that from this fount of mercy (7) souls draw graces solely with the vessel of trust. If their trust is great, there is no limit to My generosity. The torrents of grace inundate humble souls. The proud remain always in poverty and misery, because My grace turns away from them to humble souls.