Explains "authentic magisterium," distinguishing it from the ordinary magisterium.Excerpt from another good article discussing the authentic magisterium:https://sspx.org/en/clear-ideas-popes-infallible-magisterium Clear ideas on the pope's infallible magisterium
What worries Catholics most in the current crisis in the Church is precisely the "problem of the pope." We need very clear ideas on this question. We must avoid shipwreck to the right and to the left, either by the spirit of rêbêllïon or, on the other hand, by an inappropriate and servile obedience. The serious error which is behind many current disasters is the belief that the "Authentic Magisterium" is nothing other than the "Ordinary Magisterium."
The "Authentic Magisterium" cannot be so simply identified with the Ordinary Magisterium. In fact, the Ordinary Magisterium can be infallible and non-infallible, and it is only in this second case that it is called the "Authentic Magisterium." The Dictionnaire de Theologie Catholique [hereafter referred to as DTC—Ed.] under the heading of "papal infallibility" (vol. VII, col. 1699ff) makes the following distinctions:
there is the "infallible or ex cathedra papal definition in the sense defined by Vatican I" (col.1699);
there is the "infallible papal teaching which flows from the pope’s Ordinary Magisterium" (col.1705);
there is "non-infallible papal teaching" (col.1709).
Similarly, Salaverri, in his Sacrae Theologiae Summa (vol. I, 5th ed., Madrid, B.A.C.) distinguishes the following:
Extraordinary Infallible Papal Magisterium (no. 592 ff);
Ordinary Infallible Papal Magisterium (no. 645 ff);
Papal Magisterium that is mere authenticum, that is, only "authentic" or "authorized" as regards the person himself, not as regards his infallibility (no. 659 ff).
While he always has full and supreme doctrinal authority, the pope does not always exercise it at its highest level that is at the level of infallibility. As the theologians say, he is like a giant who does not always use his full strength. What follows is this:
"It would be incorrect to say that the pope is infallible simply by possessing papal authority," as we read in the Acts of Vatican I (Coll. L ac. 399b). This would be equivalent to saying that the pope’s authority and his infallibility are the same thing.
It is necessary to know "what degree of assent is due to the decrees of the sovereign pontiff when he is teaching at a level which is not that of infallibility, i.e., when he is not exercising the supreme degree of his doctrinal authority" (Salaverri, op.cit., no. 659).