http://www.dici.org/en/docuмents/conference-given-by-bp-fellay-october-8-2016-port-marly-france/

Can a Pastoral Council be Debatable?

All of a sudden, more than a year ago, Rome made us a new proposition. They were really stuck because we were saying: No. We cannot say that the Council is traditional. We cannot. And then this new Mass, we cannot say that it is good. Well, then, all of a sudden, they made us a new proposition, and you can understand what happened through certain interviews given by Abp. Pozzo. He explains to us that, at the start, they wanted to make us accept everything and that that did not work. They asked themselves therefore how to get out of the predicament, since everything was blocked, and it seems that they found the method. It was to distinguish within the Council some more important parts and others that are less important. The first time Abp. Pozzo spoke about this was in February of 2016, but you see, that was already almost nine months after they had made us their proposition.

In effect they dropped some rather important things. They no longer ask us to recite the “profession of Cardinal Ratzinger” . Precisely where Abp. Lefebvre had stumbled on a remark by Cardinal Ratzinger that had added something to the usual profession of faith. And this addition concerns what we call the authentic Magisterium. Cardinal Ratzinger, at that time, had explained that with this addition they were asking for religious submission to the docuмents of the authentic Magisterium, obliging Catholics to accept the Council.

This can be debated: it is true per se that we owe respectful submision to magisterial docuмents, an Encyclical for example. It is normal to receive this docuмent respectfully, since it is issued by the supreme authority. In itself the phrase is not shocking, it is even Catholic. But of course, when you make the connection with this Council, it starts to become more awkward.

And therefore we truly balked at this profession of faith. Well, as it turns out, they no longer demand it of us! They ask us to recite the old one that is called the Tridentine profession of faith of Pie IV. In the docuмent they call it the “profession of the Council Fathers”. Yes, the Council Fathers—in other words, all the bishops gathered at Vatican Council II—made, at the beginning of the first session, a profession of faith that is the traditional profession of faith. Just as the Mass that was celebrated during the Council was the old Mass….

http://www.preces-latinae.org/thesaurus/Symbola/Tridentinae.html

The "Professio fidei Tridentina", also known as the "Creed of Pope Pius IV", is one of the four authoritative Creeds of the Catholic Church. It was issued on November 13, 1565 by Pope Pius IV in his bull "Iniunctum nobis" under the auspices of the Council of Trent (1545 - 1563). It was subsequently modified slightly after the First Vatican Council (1869 - 1870) to bring it inline with the dogmatic definitions of the Council. The major intent of the Creed was to clearly define the Catholic faith against Protestantism. At one time it was used by Theologians as an oath of loyalty to the Church and to reconcile converts to the Church, but it is rarely used these days.

I, N, with a firm faith believe and profess each and everything which is contained in the Creed which the Holy Roman Church maketh use of. To wit:

I believe in one God, The Father Almighty, Maker of heaven and earth, and of all things visible and invisible. And in one Lord, Jesus Christ, the Only-begotten Son of God. Born of the Father before all ages. God of God, Light of Light, true God of true God. Begotten, not made, of one substance with the Father. By whom all things were made. Who for us men and for our salvation came down from heaven. And became incarnate by the Holy Spirit of the Virgin Mary: and was made man. He was also crucified for us, suffered under Pontius Pilate, and was buried. And on the third day He rose again according to the Scriptures. He ascended into heaven and sits at the right hand of the Father. He will come again in glory to judge the living and the dead and His kingdom will have no end. And in the Holy Spirit, the Lord and Giver of life, Who proceeds from the Father and the Son. Who together with the Father and the Son is adored and glorified, and who spoke through the prophets. And one holy, Catholic and Apostolic Church. I confess one baptism for the forgiveness of sins and I await the resurrection of the dead and the life of the world to come. Amen.

The Apostolic and Ecclesiastical traditions and all other observances and constitutions of that same Church I firmly admit to and embrace.

I also accept the Holy Scripture according to that sense which holy mother the Church hath held, and doth hold, and to whom it belongeth to judge the true sense and interpretations of the Scriptures. Neither will I ever take and interpret them otherwise than according to the unanimous consent of the Fathers.

I also profess that there are truly and properly Seven Sacraments of the New Law, instituted by Jesus Christ our Lord, and necessary for the salvation of mankind, though not all are necessary for everyone; to wit, Baptism, Confirmation, Eucharist, Penance, Extreme Unction, Holy Orders, and Matrimony; and that they confer grace; and that of these, Baptism, Confirmation, and Holy Orders cannot be repeated without sacrilege. I also receive and admit the accepted and approved ceremonies of the Catholic Church in the solemn administration of the aforesaid sacraments.

I embrace and accept each and everything which has been defined and declared in the holy Council of Trent concerning original sin and justification.

This true Catholic faith, outside of which no one can be saved, which I now freely profess and to which I truly adhere, I do so profess and swear to maintain inviolate and with firm constancy with the help of God until the last breath of life. And I shall strive, as far as possible, that this same faith shall be held, taught, and professed by all those over whom I have charge. I N. do so pledge, promise, and swear, so help me God and these Holy Gospels of God.

The distinguished theologians who deny the papal encyclicals the status of infallible docuмents teach, none the less, that the faithful are bound in conscience to accord these letters not only the tribute of respectful silence, but also a definite and sincere internal religious assent. To this end many of them, like Fr. De Groot, [30] apply to the encyclicals a teaching with the eminent and brilliant Dominic Palmieri had developed about the Catholic attitude towards non-infallible teaching in the Church. [31] Pegues, in his Revue thomiste article, makes this application with his usual clarity.

Hence it follows that the authority of the encyclicals is not at all the same as that of the solemn definition, the one properly so-called. The definition demands an assent without reservation and makes a formal act of faith obligatory. The case of the encyclical’s authority is not the same. This authority (of the papal encyclicals) is undoubtedly great. It is, in a sense, sovereign. It is the teaching of the supreme pastor and teacher of the Church. Hence the faithful have a strict obligation to receive this teaching with an infinite respect. A man must not be content simply not to contradict it openly and in a more or less scandalous fashion. An internal mental assent is demanded. It should be received as the teaching sovereignly authorized within the Church.

Ultimately, however, this assent is not the same as the one demanded in the formal act of faith. Strictly speaking, it is possible that this teaching (proposed in the encyclical letter) is subject to error. There are a thousand reasons to believe that it is not. It has probably never been (erroneous), and it is normally certain that it will never be. But, absolutely speaking, it could be, because God does not guarantee it as He guarantees the teaching formulated by way of definition’.

Our Lady of Fatima gave us "heads up" with her warning about "Apostasy from the top". What is happening in Rome should not surprise us. I just read an interesting quote from St. Athanasius which we can apply to our own times:

Quote

Thus, the more violently they try to occupy the places of worship, the more they separate themselves from the Church. They claim that they represent the Church; but in reality, they are the ones who are expelling themselves from it and going astray. Even if Catholics faithful to the Tradition are reduced to a handful, they are the ones who are the true Church of Jesus Christ.  
St. Athanasius