With respect but where did I say the framers of that old catechism “lied or didn’t know the faith very well”? As for the LDS, I have always found them to be very thoroughly upstanding people so I take that comparative comment as a backhanded compliment.
Contrary to what many people outside the faith appear to believe, the Catholic Church has defined very little about the doctrine of Purgatory. All we know is that many, or even most, people will probably experience it after death; that it purifies and perfects us, preparing us for God’s presence; that there is remorse and reflection over one’s attachments to certain sins in life, which is painful to have to face; that the souls in purgatory are not separated from the love of God and that the prayers and good works of Christians here on earth offer succor to those going through the process of purification. Other than a few such defined parameters, practically everything else is questionable and up for discussion about the doctrine.
I explained to the contrary how the Baltimore Catechism relied upon one particular, very dated [1614] (and speculative but not unorthodox) interpretation, among many competing theories, of the purgatorial state post-mortem. I don’t share it and neither did the past few popes, or for that matter many prominent theologians today. It isn’t “in vogue” so to speak, nor do I believe it ever will be again given how times have changed and it doesn’t fit with the development of the doctrine, as it is now set forth by the Magisterium in the relevant papal documents. Its for the dustbin of ecclesiastical history, whereas St. Catherine’s (and for that matter the more Eastern Catholic-influenced interpretations) is now prevalent in a refined state in the papal magisterium, with Pope Benedict XVI even delivering a full address on the topic of her explanations regarding purgatory in 2011 and having referenced her in his 2007 encyclical. Not Bellarmime or the Baltimore Catechism based upon his earlier tome.
There are doctrinal elements which any framework for conceiving of “purgatory” must comply with to be considered “not heretical”, a bare minimum (as with any other dogmas/doctrines, which we call “the deposit of faith”). These, so-called “de fide” articles of beliefs, must be given an assent of faith by all practicing Catholics. I’ve already told you what these requirements are, by allusion: such that even the Eastern Orthodox ‘intermediate state’, certainly as outlined in the Confession of Dositheus, passes muster and satisfies the bare necessities for doctrinal purity in this regard.
Beyond this, Catholic theologians are free to speculate and sometimes different speculative interpretations become predominant in a given time period, only to be displaced later by others unless the Magisterium explicitly prohibits this. There is no harm in this, the dogmatic truth stays constant while the understanding of the doctrine validly develops; often through debates, controversies and discussions over time.
In my Church, the general rule of thumb was enunciated by Pope St. John XXIII in his 1959 encyclical Ad Petri Cathedram:
https://www.ewtn.com/library/encyc/i23petri.htm
Encyclical of Pope John XXIII On Truth, Unity and Peace, In A Spirit of Charity, promulgated on 29 June 1959
69. The Catholic Church teaches the necessity of believing firmly and faithfully all that God has revealed. This revelation is contained in sacred scripture and in the oral and written tradition that has come down through the centuries from the apostolic age and finds expression in the ordinances and definitions of the popes and legitimate Ecumenical Councils…
71. The Catholic Church, of course, leaves many questions open to the discussion of theologians. She does this to the extent that matters are not absolutely certain. Far from jeopardizing the Church’s unity, this can actually pave the way for its attainment. For discussion can lead to fuller and deeper understanding of religious truths; when one idea strikes against another, there may be a spark.[25]
72. But the common saying, expressed in various ways and attributed to various authors, must be recalled with approval: in essentials, unity; in doubtful matters, liberty; in all things, charity…All men, then, should be joined in mutual and just regard for one another’s opinions.
It seems yet again that you take issue with the most recent papal pronouncements respecting purgatory, which are partly inspired by the (very influential) interpretation of St. Catherine of Genoa from the fifteenth - very early sixteenth century (1473 - 1510 to be exact), predating Bellarmine’s 1614 catechism which the Baltimore catechism is based upon actually, by more than a hundred years.
That’s fine but it is what it is IMHO.
You are entitled to your opinion and I am entitled to mine, just like Catherine of Genoa and Robert Bellarmine (along with their followers) were entitled to their divergent interpretations of purgatory back in the sixteenth century. Neither interpretation was unorthodox, neither one was defined as dogma but both were approved by the Church as having nothing contrary to faith and morals.
That being said, there is also the expectation that one will give a degree of assent to the teachings of the Pope, out of respect for his office, even when he is not speaking ex cathedra and de fide.
"This religious submission of mind and will must be shown in a special way to the authentic magisterium of the Roman Pontiff, even when he is not speaking ex cathedra; that is, it must be shown in such a way that his supreme magisterium is acknowledged with reverence, the judgments made by him are sincerely adhered to, according to his manifest mind and will.”
~Dogmatic Constitution on the Church #25
Now Lumen Gentium, the Dogmatic Constitution on the Church, is one of the principal documents of the Second Vatican Council.
So I am doing this with regard to the most recent papal pronouncements on purgatory, particularly the 2007 encyclical (it being the most recent and authoritative) since the Holy Fathers have “stuck their necks” out on the issue so to speak, even though there is much remaining up for charitable disagreement.