From what you describe, it appears one would think that the practice of virtues would demand that we decide whether or not the See of Peter is vacant, along with every other See and diocese within the juridical framework of the Church today.
Not necessarily. Yes, insofar as an individual Catholic needs the Sacraments and the spiritual direction of a Father Confessor in order to cultivate the interior life, there is a practical necessity to formulate an opinion, at least provisionally and privately, whether or not the Apostolic See is vacant or not and what that implies, because the traditional clergy to which they have recourse have made their stance on it. Even the opinion that such a question is not important is a response to the question of the Papacy that enables one to choose amongst Chapels and Priests.
Do you see no distinction between that which constitutes the Faith and the practice of virture and willingly forming the opinion that a particular seat of authority is not occupied? Is that a unique requirement of today, an additional grace necessary?
No I do not, because the "particular seat of authority" in question is the Apostolic See, the Roman Pontiff to whom Our Lord has given absolute primacy over all Christendom and infallibility in teaching faith and morals
ex cathedra. The Papacy is absolutely central to the Catholic faith, and the identity of the Sovereign Pontiff is morally necessary for each Catholic to know in the present age.
There may be individual Catholics who have a certain indifference (for lack of a better phrase) regarding the question of the Papacy, and have cultivated a lofty interior life and have practice the virtues to an eminent degree. But, because they are
Catholics, it can be said that there is an implicit practical stance on this issue since such a degree of perfection implies the regular reception of the Sacraments and the tutelage of a Father Confessor, the selection of which implies some sort of stance on the Pope issue.
Obviously no such grace was ever necessary for the advancement of the interior life within the entire history of the Church.
No, I cannot agree with this. The argument that has been repeated over and over again that "past generations did not know the identity of the Pope" is misleading. Catholics have the responsibility to educate themselves as much as possible regarding faith and morals. I do not understand how the identity of the Roman Pontiff can be somehow irrelevant to the understanding of faith and morals as Catholics ought to understand them.
Past generations may not have known who the Pope was, but their fidelity to their Pastors and local Ordinaries was enough to constitute the expression of loyalty to the Pope that is necessary for salvation. Nowadays, with the propagation of literacy and communication (especially through the internet) we cannot plead the ignorance of the simplest amongst our forefathers, at least not in the same way.
Additionally, the normal way in which one comes to this determination is either through intensive study of docuмents or on the authority of someone else. But virtue has never depended on such an intensive study that involved a series of judgments that have nothing at all to do with the spiritual life.
I agree, but an interior life that is not founded on solid theological foundations is not likely to withstand the obfuscation that usually accompanies the reading of polemicists' publications. This statement is completely true when it comes to many things, but not the Papacy, I think.
Again, perhaps I'm wrong, but I just don't understand how Catholics are simultaneously bound to profess the dogma of the primacy and infallibility of the Roman Pontiff under pain of heresy, and yet be indifferent when it comes to identity of the Pope.