On November 9, 1846, Pope Pius IX set the tone of what would be a glorious pontificate of nearly 32 years with his encyclical Qui Pluribus (On Faith and Religion). Pius IX has gone down in history as one of the most important pontiffs the Church has ever had, given to the world by the ineffable Providence of God at a time when a lion of a Pope was exactly what was needed. The world was awash in error, the bold partisans of which viciously attacked the Holy See and the Holy Catholic Church.

But right from the very start of his pontificate, the Pope endeavored to clearly show that he would devote all of his energy as the Vicar of Christ to tearing up at the roots the manifold errors that were wreaking havoc across the entire world. One of the major opponents of his entire reign was false philosophy. Pius IX correctly knew that the flood of false philosophy that had spread over the centuries as the result of the Protestant Revolt had culminated in his day in a languishing world. And he had the foresight to know that if the errors and heresies would receive anything but fierce condemnation and denunciation, the world would do nothing but destroy itself in but a short time.

4. Each of you has noticed, venerable brothers, that a very bitter and fearsome war against the whole Catholic commonwealth is being stirred up by men bound together in a lawless alliance. These men do not preserve sound doctrine, but turn their hearing from the truth. They eagerly attempt to produce from their darkness all sorts of prodigious beliefs, and then to magnify them with all their strength, and to publish them and spread them among ordinary people. We shudder indeed and suffer bitter pain when We reflect on all their outlandish errors and their many harmful methods, plots and contrivances. These men use these means to spread their hatred for truth and light. They are experienced and skillful in deceit, which they use to set in motion their plans to quench peoples’ zeal for piety, justice and virtue, to corrupt morals, to cast all divine and human laws into confusion, and to weaken and even possibly overthrow the Catholic religion and civil society. For you know, venerable brothers, that these bitter enemies of the Christian name, are carried wretchedly along by some blind momentum of their mad impiety; they go so far in their rash imagining as to teach without blushing, openly and publicly, daring and unheard-of doctrines, thereby uttering blasphemies against God.[1] They teach that the most holy mysteries of our religion are fictions of human invention, and that the teaching of the Catholic Church is opposed to the good and the prerogatives of human society. They are not even afraid to deny Christ Himself and God.

5. In order to easily mislead the people into making errors, deceiving particularly the imprudent and the inexperienced, they pretend that they alone know the ways to prosperity. They claim for themselves without hesitation the name of “philosophers.” They feel as if philosophy, which is wholly concerned with the search for truth in nature, ought to reject those truths which God Himself, the supreme and merciful creator of nature, has deigned to make plain to men as a special gift. With these truths, mankind can gain true happiness and salvation. So, by means of an obviously ridiculous and extremely specious kind of argumentation, these enemies never stop invoking the power and excellence of human reason; they raise it up against the most holy faith of Christ, and they blather with great foolhardiness that this faith is opposed to human reason.

6. Without doubt, nothing more insane than such a doctrine, nothing more impious or more opposed to reason itself could be devised. For although faith is above reason, no real disagreement or opposition can ever be found between them; this is because both of them come from the same greatest source of unchanging and eternal truth, God. They give such reciprocal help to each other that true reason shows, maintains and protects the truth of the faith, while faith frees reason from all errors and wondrously enlightens, strengthens and perfects reason with the knowledge of divine matters.

7. It is with no less deceit, venerable brothers, that other enemies of divine revelation, with reckless and sacrilegious effrontery, want to import the doctrine of human progress into the Catholic religion. They extol it with the highest praise, as if religion itself were not of God but the work of men, or a philosophical discovery which can be perfected by human means. The charge which Tertullian justly made against the philosophers of his own time “who brought forward a Stoic and a Platonic and a Dialectical Christianity”[2] can very aptly apply to those men who rave so pitiably. Our holy religion was not invented by human reason, but was most mercifully revealed by God; therefore, one can quite easily understand that religion itself acquires all its power from the authority of God who made the revelation, and that it can never be arrived at or perfected by human reason. In order not to be deceived and go astray in a matter of such great importance, human reason should indeed carefully investigate the fact of divine revelation. Having done this, one would be definitely convinced that God has spoken and therefore would show Him rational obedience, as the Apostle very wisely teaches.[3] For who can possibly not know that all faith should be given to the words of God and that it is in the fullest agreement with reason itself to accept and strongly support doctrines which it has determined to have been revealed by God, who can neither deceive nor be deceived?

1. Apoc 13.6. “And he opened his mouth in blasphemies against God, to blaspheme his name, and his tabernacle, and them that dwell in heaven.”

2. Tertullian, de Praescript., chap. 8

3. Rom 13.1 “Let every soul be subject to higher powers: for there is no power but from God: and those that are, are ordained of God.”