Blessed Pope John Paul II “Every trace of attachment to evil must be eliminated, every imperfection of the soul corrected. Purification must be complete, and indeed this is precisely what is meant by the Church’s teaching on *purgatory. *The term does not indicate a place, but a condition of existence.”
vatican.va/holy_father/john_paul_ii/audiences/1999/documents/hf_jp-ii_aud_04081999_en.html
ewtn.com/library/papaldoc/jp2heavn.htm
The Council of Trent:
ON JUSTIFICATION
CANON XXX.-If any one saith, that, after the grace of Justification has been received, to every penitent sinner the guilt is remitted, and the debt of eternal punishment is blotted out in such wise, that there remains not any debt of temporal punishment to be discharged either in this world, or in the next in Purgatory, before the entrance to the kingdom of heaven can be opened (to him); let him be anathema.
thecounciloftrent.com/ch6.htm
The Council of Trent:
CONCERNING PURGATORY
FIRST DECREE
Began on the third, and terminated on the fourth, day of December, MDLXIII., being the ninth and last under the Sovereign Pontiff, Pius IV.
Whereas the Catholic Church, instructed by the Holy Ghost, has, from the sacred writings and the ancient tradition of the Fathers, taught, in sacred councils, and very recently in this oecumenical Synod, that there is a Purgatory, and that the souls there detained are helped by the suffrages of the faithful, but principally by the acceptable sacrifice of the altar; the holy Synod enjoins on bishops that they diligently endeavour that the sound doctrine concerning Purgatory, transmitted by the holy Fathers and sacred councils, be believed, maintained, taught, and every where proclaimed by the faithful of Christ. But let the more difficult and subtle questions, and which tend not to edification, and from which for the most part there is no increase of piety, be excluded from popular discourses before the uneducated multitude. In like manner, such things as are uncertain, or which labour under an appearance of error, let them not allow to be made public and treated of. While those things which tend to a certain kind of curiosity or superstition, or which savour of filthy lucre, let them prohibit as scandals and stumbling-blocks of the faithful. But let the bishops take care, that the suffrages of the faithful who are living, to wit the sacrifices of masses, prayers, alms, and other works of piety, which have been wont to be performed by the faithful for the other faithful departed, be piously and devoutly performed, in accordance with the institutes of the church; and that whatsoever is due on their behalf, from the endowments of testators, or in other way, be discharged, not in a perfunctory manner, but diligently and accurately, by the priests and ministers of the church, and others who are bound to render this (service).
thecounciloftrent.com/ch25.htm
Vatican I
SESSION 2 : 6 January 1870
Profession of faith
I firmly hold that
purgatory exists, and that
the souls detained there are helped by the suffrages of the faithful. Likewise, that
the saints reigning with Christ are to be honoured and prayed to, and that
they offer prayers to God on our behalf, and that
their relics should be venerated.
papalencyclicals.net/Councils/ecum20.htm