Let us consider the question of “Pope sifting” more carefully and examine its implications and importance in relation to our inquiry.
First, what is Pope sifting? It is the practice of believing or concluding that a generally accepted Roman Pontiff was not in in fact Pope based on a problematic election, personal defect, heresy, or something similar.
What is the outcome of this practice? It allows any person or group to conclude with moral certainty, some say with Divine Faith, that a particular man is not and could not have been the Pope based on individual reasoning and without juridical process.
What are the implications of this approach? Any man, with good reasoning, may judge for himself the legitimacy of a Roman Pontiff and conclude that he was not in fact the Roman Pontiff thereby rejecting the authoritative magisterial acts of the Pope that is rejected.
What are the consequences of this mindset? The creation of individual liberties which allow persons to judge for themselves who is and is not a Pope. Therefore Richard Ibranyi believes that there has been no Pope since the 12th century and all subsequent developments heretical and illegitimate, the Old Catholic believes Pius IX was a heretic and there has been no Pope since then, others still say that there has been no Pope since the Arian crisis. In fact, we have a member of this board, Roscoe, who believes that Pope Boniface VIII was an anti-Pope.
The consequences of this action are dangerous and contrary to the accepted principles of the Church’s magisterium and Her theologians.
Suarez explains:
“Catholic truth could not subsist, nor the certitude of which is Christ’s only Church, since these depend altogether on the union with the true head, and requires true and legitimate priests, pastors, and ecclesiastical hierarchy. But all these things depend on whether or not the true and legitimate Pontiff, taken individually, is certain. And the reason why I could doubt the legitimacy of one Pontiff would allow me to doubt the legitimacy of his predecessor, and thus of the entire series before them. Therefore, one could also doubt the legitimacy of the bishops and cardinals which they have created, and thus any certainty of the true Church and of the hierarchical order would be ruined. How could the heretics be refuted, who argue that true succession has ceased at least from the time of Pope Urban. They indeed seem to infer that it could not anymore be certain enough, whether he has truly succeeded
to the supreme pontiff, or where among the nations is the true visible Church.”
St. Jerome: “Nevertheless there is no schism which does not trump up a heresy to justify its departure from the Church” (In Ep. ad Tit., iii, 10). And St. Augustine: "By false doctrines concerning God heretics wound faith, by iniquitous dissensions schismatics deviate from fraternal charity, although they believe what we believe" (On Faith and the Creed 9).