A prominent part of papal praxis is the way of Heresy condemned in the fifth century

The way of heresy in the Shadow * Church and it's long ago condemnation...

(Pope) St. Gelasius 1 492-496 A.D.

Denzinger's 161 (1) [For] it has been reported to us, that in the regions of the Dalmatians certain men had disseminated the recurring tares of the Pelagian pest, and that their blasphemy prevails there to such a degree that they are deceiving all the simple by the insinuation of their deadly madness. . . . [But] since the Lord is superior, the pure truth of Catholic faith drawn front the concordant opinions of all the Fathers remains present. . . . (2) . . . What pray permits us to abrogate what has been condemned by the venerable Fathers, and to reconsider the impious dogmas that have been demolished by them? Why is it, therefore, that we take such great precautions lest any dangerous heresy, once driven out, strive anew to come [up] for examination, if we argue that what has been known, discussed, and refuted of old by our elders ought to be restored? Are we not ourselves offering, which God forbid, to all the enemies of the truth an example of rising again against ourselves, which the Church will never permit? Where is it that it is written: Do not go beyond the limits of your fathers [Prov. 22:28], and: Ask your fathers and they will tell you, and your elders will declare unto you [Deut. 32:7]? Why, accordingly, do we aim beyond the definitions of our elders, or why do they not suffice for us? If in our ignorance we desire to learn something, how every single thing to be avoided has been prescribed by the orthodox fathers and elders, or everything to be adapted to Catholic truth has been decreed, why are they not approved by these? Or are we wiser than they, or shall we be able to stand constant with firm stability, if we should undermine those [dogmas] which have been established by them? . . .


Luther's works ** are a fetid sinkhole, an abomination, and following his claims will lead a soul to HELL.  

The truth about Luther and his claims are not to be praised, as the Papal Preacher, Fr. Raniero Cantalemessa does, but to be condemned and his books burned, not cited and excerpts from them praised inside Saint Peter's Basilica during the Sacred Tritium.

Exsurge Domine
(Condemning the Errors of Martin Luther)
Bull of Pope Leo X issued June 15, 1520



...No one of sound mind is ignorant how destructive, pernicious, scandalous, and seductive to pious and simple minds these various errors are, how opposed they are to all charity and reverence for the holy Roman Church who is the mother of all the faithful and teacher of the faith; how destructive they are of the vigor of ecclesiastical discipline, namely obedience. This virtue is the font and origin of all virtues and without it anyone is readily convicted of being unfaithful.

Therefore we, in this above enumeration, important as it is, wish to proceed with great care as is proper, and to cut off the advance of this plague and cancerous disease so it will not spread any further in the Lord's field as harmful thorn bushes. We have therefore held a careful inquiry, scrutiny, discussion, strict examination, and mature deliberation with each of the brothers, the eminent cardinals of the holy Roman Church, as well as the priors and ministers general of the religious orders, besides many other professors and masters skilled in sacred theology and in civil and canon law. We have found that these errors or theses are not Catholic, as mentioned above, and are not to be taught, as such; but rather are against the doctrine and tradition of the Catholic Church, and against the true interpretation of the sacred Scriptures received from the Church. Now Augustine maintained that her authority had to be accepted so completely that he stated he would not have believed the Gospel unless the authority of the Catholic Church had vouched for it. For, according to these errors, or any one or several of them, it clearly follows that the Church which is guided by the Holy Spirit is in error and has always erred. This is against what Christ at his ascension promised to his disciples (as is read in the holy Gospel of Matthew): "I will be with you to the consummation of the world"; it is against the determinations of the holy Fathers, or the express ordinances and canons of the councils and the supreme pontiffs. Failure to comply with these canons, according to the testimony of Cyprian, will be the fuel and cause of all heresy and schism.

With the advice and consent of these our venerable brothers, with mature deliberation on each and every one of the above theses, and by the authority of almighty God, the blessed Apostles Peter and Paul, and our own authority, we condemn, reprobate, and reject completely each of these theses or errors as either heretical, scandalous, false, offensive to pious ears or seductive of simple minds, and against Catholic truth. By listing them, we decree and declare that all the faithful of both sexes must regard them as condemned, reprobated, and rejected . . . We restrain all in the virtue of holy obedience and under the penalty of an automatic major excommunication....

Moreover, because the preceding errors and many others are contained in the books or writings of Martin Luther, we likewise condemn, reprobate, and reject completely the books and all the writings and sermons of the said Martin, whether in Latin or any other language, containing the said errors or any one of them; and we wish them to be regarded as utterly condemned, reprobated, and rejected. We forbid each and every one of the faithful of either sex, in virtue of holy obedience and under the above penalties to be incurred automatically, to read, assert, preach, praise, print, publish, or defend them. They will incur these penalties if they presume to uphold them in any way, personally or through another or others, directly or indirectly, tacitly or explicitly, publicly or occultly, either in their own homes or in other public or private places. 

Indeed immediately after the publication of this letter these works, wherever they may be, shall be sought out carefully by the ordinaries and others [ecclesiastics and regulars], and under each and every one of the above penalties shall be burned publicly and solemnly in the presence of the clerics and people.

As far as Martin himself is concerned, O good God, what have we overlooked or not done? What fatherly charity have we omitted that we might call him back from such errors? For after we had cited him, wishing to deal more kindly with him, we urged him through various conferences with our legate and through our personal letters to abandon these errors. We have even offered him safe conduct and the money necessary for the journey urging him to come without fear or any misgivings, which perfect charity should cast out, and to talk not secretly but openly and face to face after the example of our Savior and the Apostle Paul. If he had done this, we are certain he would have changed in heart, and he would have recognized his errors. He would not have found all these errors in the Roman Curia which he attacks so viciously, ascribing to it more than he should because of the empty rumors of wicked men. We would have shown him clearer than the light of day that the Roman pontiffs, our predecessors, whom he injuriously attacks beyond all decency, never erred in their canons or constitutions which he tries to assail. For, according to the prophet, neither is healing oil nor the doctor lacking in Galaad.

But he always refused to listen and, despising the previous citation and each and every one of the above overtures, disdained to come. To the present day he has been contumacious. With a hardened spirit he has continued under censure over a year. What is worse, adding evil to evil, and on learning of the citation, he broke forth in a rash appeal to a future council. This to be sure was contrary to the constitution of Pius II and Julius II our predecessors that all appealing in this way are to be punished with the penalties of heretics. In vain does he implore the help of a council, since he openly admits that he does not believe in a council.

Therefore we can, without any further citation or delay, proceed against him to his condemnation and damnation as one whose faith is notoriously suspect and in fact a true heretic with the full severity of each and all of the above penalties and censures. Yet, with the advice of our brothers, imitating the mercy of almighty God who does not wish the death of a sinner but rather that he be converted and live, and forgetting all the injuries inflicted on us and the Apostolic See, we have decided to use all the compassion we are capable of. It is our hope, so far as in us lies, that he will experience a change of heart by taking the road of mildness we have proposed, return, and turn away from his errors. We will receive him kindly as the prodigal son returning to the embrace of the Church.

Therefore let Martin himself and all those adhering to him, and those who shelter and support him, through the merciful heart of our God and the sprinkling of the blood of our Lord Jesus Christ by which and through whom the redemption of the human race and the upbuilding of holy mother Church was accomplished, know that from our heart we exhort and beseech that he cease to disturb the peace, unity, and truth of the Church for which the Savior prayed so earnestly to the Father. Let him abstain from his pernicious errors that he may come back to us. If they really will obey, and certify to us by legal documents that they have obeyed, they will find in us the affection of a father's love, the opening of the font of the effects of paternal charity, and opening of the font of mercy and clemency.