Since the words of the Church's Magisterium must in turn be answered by words of the Church's Magisterium, we ask anyone having found any quotations from pre-Vatican II Popes restricting either papal infallibility or the submission we owe the Sovereign Pontiff to kindly forward them to us.

 “Nor can We pass over in silence the audacity of those who, not enduring sound doctrine, contend that “without sin and without any sacrifice of the Catholic profession assent and obedience may be refused to those judgments and decrees of the Apostolic See, whose object is declared to concern the Church’s general good and her rights and discipline, so only it does not touch the dogmata of faith and morals.” But no one can be found not clearly and distinctly to see and understand how grievously this is opposed to the Catholic dogma of the full power given from God by Christ Our Lord Himself to the Roman Pontiff of feeding, ruling and guiding the Universal Church.”

His Holiness Pope Pius IX, Encyclical Letter Quanta cura, 8 December 1864

If in the difficult times in which Our lot is cast, Catholics will give ear to Us, as it behoves them to do, they will readily see what are the duties of each one in matters of opinion as well as action. As regards opinion, whatever the Roman Pontiffs have hitherto taught, or shall hereafter teach, must be held with a firm grasp of mind, and, so often as occasion requires, must be openly professed.

Pope Leo XIII, Encyclical Letter Immortale Dei, 1st November 1895

This obedience should, however, be perfect, because it is enjoined by faith itself, and has this in common with faith, that it cannot be given in shreds; nay, were it not absolute and perfect in every particular, it might wear the name of obedience, but its essence would disappear. Christian usage attaches such value to this perfection of obedience that it has been, and will ever be, accounted the distinguishing mark by which we are able to recognize Catholics. Admirably does the following passage from St. Thomas Aquinas set before us the right view:

"The formal object of faith is primary truth, as it is shown forth in the holy Scriptures, and in the teaching of the Church, which proceeds from the fountainhead of truth. It follows, therefore, that he who does not adhere, as to an infallible divine rule, to the teaching of the Church, which proceeds from the primary truth manifested in the holy Scriptures, possesses not the habit of faith; but matters of faith he holds otherwise than true faith. Now, it is evident that he who clings to the doctrines of the Church as to an infallible rule yields his assent to everything the Church teaches; but otherwise, if with reference to what the Church teaches he holds what he likes but does not hold what he does not like, he adheres not to the teaching of the Church as to an infallible rule, but to his own will."

"The faith of the whole Church should be one, according to the precept (1 Cor. 1:10): "Let all speak the same thing, and let there be no schisms among you"; and this cannot be observed save on condition that questions which arise touching faith should be determined by him who presides over the whole Church, whose sentence must consequently be accepted without wavering. And hence to the sole authority of the supreme Pontiff does it pertain to publish a new revision of the symbol, as also to decree all other matters that concern the universal Church."

In defining the limits of the obedience owed to the pastors of souls, but most of all to the authority of the Roman Pontiff, it must not be supposed that it is only to be yielded in relation to dogmas of which the obstinate denial cannot be disjoined from the crime of heresy. Nay, further, it is not enough sincerely and firmly to assent to doctrines which, though not defined by any solemn pronouncement of the Church, are by her proposed to belief, as divinely revealed, in her common and universal teaching, and which the Vatican Council declared are to be believed "with Catholic and divine faith." But this likewise must be reckoned amongst the duties of Christians, that they allow themselves to be ruled and directed by the authority and leadership of bishops, and, above all, of the Apostolic See. And how fitting it is that this should be so any one can easily perceive. For the things contained in the divine oracles have reference to God in part, and in part to man, and to whatever is necessary for the attainment of his eternal salvation. Now, both these, that is to say, what we are bound to believe and what we are obliged to do, are laid down, as we have stated, by the Church using her divine right, and in the Church by the supreme Pontiff. Wherefore it belongs to the Pope to judge authoritatively what things the sacred oracles contain, as well as what doctrines are in harmony, and what in disagreement, with them; and also, for the same reason, to show forth what things are to be accepted as right, and what to be rejected as worthless; what it is necessary to do and what to avoid doing, in order to attain eternal salvation. For, otherwise, there would be no sure interpreter of the commands of God, nor would there be any safe guide showing man the way he should live.

 Pope Leo XIII, Encyclical Letter Sapientiae Christianae, 10 January 1890

Christ instituted in the Church a living, authoritative and permanent Magisterium […] He willed and ordered, under the gravest penalties, that its teachings should be received as if they were His own. […] If it [i.e. the teaching of the Church] could in any way be false, an evident contradiction follows; for then God Himself would be the author of error in man.

Pope Leo XIII, Encyclical Letter Satis cognitum, 29 June 1896

 Therefore, when we love the Pope, there are no discussions regarding what he orders or demands, or up to what point obedience must go, and in what things he is to be obeyed; when we love the Pope, we do not say that he has not spoken clearly enough, almost as if he were forced to repeat to the ear of each one the will clearly expressed so many times not only in person, but with letters and other public documents; we do not place his orders in doubt, adding the facile pretext of those unwilling to obey - that it is not the Pope who commands, but those who surround him; we do not limit the field in which he might and must exercise his authority; we do not set above the authority of the Pope that of other persons, however learned, who dissent from the Pope, who, even though learned, are not holy, because whoever is holy cannot dissent from the Pope.

Pope St Pius X, Allocution Vi ringrazio to the Priests of the Apostolic Union, 18 November 1912

For the teaching authority of the Church, which in the divine wisdom was constituted on earth in order that revealed doctrines might remain intact for ever, and that they might be brought with ease and security to the knowledge of men, and which is daily exercised through the Roman Pontiff and the Bishops who are in communion with him, has also the office of defining, when it sees fit, any truth with solemn rites and decrees, whenever this is necessary either to oppose the errors or the attacks of heretics, or more clearly and in greater detail to stamp the minds of the faithful with the articles of sacred doctrine which have been explained… In the use of this extraordinary teaching authority no newly invented matter is brought in…

In the continual carrying out of this task, will any element of strength and efficiency be wanting to the Church, when Christ Himself is perpetually present to it, according to His solemn promise: "Behold I am with you all days, even to the consummation of the world?" (Mat. XXVIII, 20)?

Has then this doctrine of the Apostles completely vanished away, or sometimes been obscured, in the Church, whose ruler and defence is God Himself? If our Redeemer plainly said that His Gospel was to continue not only during the times of the Apostles, but also till future ages, is it possible that the object of faith should in the process of time become so obscure and uncertain, that it would be necessary today to tolerate opinions which are even incompatible one with another? If this were true, we should have to confess that the coming of the Holy Ghost on the Apostles, and the perpetual indwelling of the same Spirit in the Church, and the very preaching of Jesus Christ, have several centuries ago, lost all their efficacy and use, to affirm which would be blasphemy. But the Only-begotten Son of God, when He commanded His representatives to teach all nations, obliged all men to give credence to whatever was made known to them by "witnesses preordained by God," (Act. X, 41) and also confirmed His command with this sanction: "He that believeth and is baptised shall be saved; but he that believeth not shall be condemned." (Marc. XVI, 16) These two commands of Christ, which must be fulfilled, the one, namely, to teach, and the other to believe, cannot even be understood, unless the Church proposes a complete and easily understood teaching, and is immune when it thus teaches from all danger of erring.

Pope Pius XI, Encyclical Letter Mortalium animos, 6 January 1928

Nor must it be thought that what is expounded in Encyclical Letters does not of itself demand consent, since in writing such Letters the Popes do not exercise the supreme power of their Teaching Authority. For these matters are taught with the ordinary teaching authority, of which it is true to say: "He who heareth you, heareth me"; (Saint Luc X, 16) and generally what is expounded and inculcated in Encyclical Letters already for other reasons appertains to Catholic doctrine. But if the Supreme Pontiffs in their official documents purposely pass judgment on a matter up to that time under dispute, it is obvious that that matter, according to the mind and will of the Pontiffs, cannot be any longer considered a question open to discussion among theologians.

Pope Pius XII, Encyclical Letter Humani generis, 12 August 1950