W]hen one loves the Pope, one does not say that he did not speak clearly enough… his orders are not questioned... the field in which he can and must exercise his authority is not limited"

~ Pope Saint Pius X, 1912

From Cardinal Fernandez's book. He is currently the head of the Dicastery for the Doctrine of the Faith of Roman Catholicism.

We ought ever to hold as a fixed principle that what is white that I see I will believe to be black if the superior authorities in Rome define it so." – St. Ignatius Loyola

Every cleric must obey the pope, even if he commands what is evil; for no one may judge the pope." – Pope Innocent III

The pope is not only the representative of Jesus Christ, but he is Jesus Christ Himself, hidden under the veil of the flesh." – St. Pius X

The Pope is God on earth Jesus has placed the pope higher than the prophets, than John the Baptist, and than all the angels Jesus has put the Pope on the same level as God Himself!" – St. John Bosco

Even if he [the Pope] were an incarnate devil we ought not to raise up our heads against him, but calmly lie down to rest on his bosom.” – St. Catherine of Siena

"If the Pope errs by commanding vices or forbidding virtues, then the Church must believe that vices are good and virtues bad, unless one wants to sin against conscience." – St. Robert Bellarmine

according to the testimony of the Gospel, the primacy of jurisdiction over the universal Church of God was immediately and directly promised and given to blessed Peter the Apostle by Christ the Lord. ... Whence, whosoever succeeds to Peter in this See, does by the institution of Christ himself obtain the Primacy of Peter over the whole Church. ... The Roman Church possesses a superiority of ordinary power over all other churches, and that this power of jurisdiction of the Roman Pontiff, which is truly episcopal, is immediate; to which all, of whatever rite and dignity, both pastors and faithful, both individually and collectively, are bound, by their duty of hierarchical subordination and true obedience, to submit not only in matters which belong to faith and morals, but also in those that appertain to the discipline and government of the Church throughout the world, so that the Church of Christ may be one flock under one supreme pastor through the preservation of unity both of communion and of profession of the same faith with the Roman Pontiff. ... And since by the divine right of Apostolic primacy the Roman Pontiff is placed over the universal Church, we further teach and declare that he is the supreme judge of the faithful, and that in all causes, the decision of which belongs to the Church, recourse may be had to his tribunal, and that none may re-open the judgment of the Apostolic See, than whose authority there is no greater, nor can any lawfully review its judgment. Wherefore they err from the right course who assert that it is lawful to appeal from the judgments of the Roman Pontiffs to an œcumenical Council, as to an authority higher than that of the Roman Pontiff."

— Vatican I, Pastor Aeternus, ch. I, III

Whoever calls himself universal bishop, or desires this noscript, is, by his pride, the precursor to the Antichrist.”

- St. Gregory the Dialogist, Pope of Rome

His Holiness Patriarch of Moscow and All Russia Kirill answered this question when he was Metropolitan of Smolensk and Kaliningrad: “I really like animals, especially dogs. I have three dogs in Moscow and two in Smolensk. The Church never considered dogs unclean animals, never forbade them to enter the room. Very many are opposed to letting the dog enter a church, not for theological reasons, but for reasons of traditional, historical nature, rooted, as it seems to me, in hygiene issues. Speaking of dogs, I would like to say that the ban on dogs entering a church is not fixed in canon law. This is just part of the tradition, and the same tradition probably applies to horses, piglets, chickens, geese and other animals. But does not apply to cats. Why? Because they always caught mice. And cats were sent in a church for this very purpose. Moreover, a cat is a very clean, almost sterile creature, it is domestic in the full sense of the word. It does not create hygiene problems for the space in which it is. I think that this is the only problem, and there is no mystery related to dogs, and, of course, there is no some kind of “anti-dog” theology. We must love animals, because, showing love for animals, we train our human emotions, become more human. As for the immortal soul, I must say that only man was created in the image and likeness of God. According to Christian teaching, animals do not have an immortal soul, and therefore, when an animal dies, we say goodbye to it forever. “

No one may drive any beast into a church except perchance a traveller, urged thereto by the greatest necessity, in default of a shed or resting-place, may have turned aside into said church. For unless the beast had been taken inside, it would have perished, and he, by the loss of his beast of burden, and thus without means of continuing his journey, would be in peril of death. And we are taught that the Sabbath was made for man: wherefore also the safety and comfort of man are by all means to be placed first. But should anyone be detected without any necessity such as we have just mentioned, leading his beast into a church, if he be a cleric let him be deposed, and if a layman let him be cut off.

(Canon 88, Qunisext Council, 692AD)

If I speak in the tongues of men and of angels, but have not love, I am a noisy gong or a clanging cymbal. And if I have prophetic powers, and understand all mysteries and all knowledge, and if I have all faith, so as to remove mountains, but have not love, I am nothing. If I give away all I have, and if I deliver up my body to be burned, but have not love, I gain nothing. (I Corinthians 13:1-3)