May I make one small correction?
"We wish to persuade Ourselves that they did not wish to confine the obligation, by which Catholic teachers and writers are absolutely bound, only to those decrees which are set forth by the infallible judgment of the Church as dogmas of faith to be believed by all [see n. 1722]. And We persuade Ourselves, also, that they did not wish to declare that that perfect adhesion to revealed truths, which they recognized as absolutely necessary to attain true progress in the sciences and to refute errors, could be obtained if faith and obedience were given only to the dogmas expressly defined by the Church. For, even if it were a matter concerning that subjection which is to be manifested by an act of divine faith, nevertheless, it would not have to be limited to those matters which have been defined by express decrees of the ecumenical Councils, or of the Roman Pontiffs and of this See, but would have to be extended also to those matters which are handed down as divinely revealed by the ordinary teaching power of the whole Church spread throughout the world, and therefore, by universal and common consent are held by Catholic theologians to belong to faith.
āBut, since it is a matter of that subjection by which in conscience all those Catholics are bound who work in the speculative sciences, in order that they may bring new advantages to the Church by their writings, on that account, then, the men of that same convention should recognize that it is not sufficient for learned Catholics to accept and revere the aforesaid dogmas of the Church, but that it is also necessary to subject themselves to the decisions pertaining to doctrine which are issued by the Pontifical Congregations, and also to those forms of doctrine which are held by the common and constant consent of Catholics as theological truths and conclusions, so certain that opinions opposed to these same forms of doctrine, although they cannot be called heretical, nevertheless deserve some theological censureā (
Pope Pius IX,
Tuas Libenter, 21 December 1863: Denz. 1683-84).
catecheticsonline.com/SourcesofDogma17.php
In short, we are bound to believe - besides the infallibly-defined dogmas ā what the ordinary and universal Magisterium teaches as belonging to the faith (which includes what the common consent of theologians holds as
de fide), even if she hasnāt solemnly defined these particular doctrines; we are also to accept the decisions of the Roman Congregations and the Churchās theological truths and conclusions (e.g., Christ was impeccable), held by the common and constant consent of her theologians.