Given these facts it is impossible to estimate how much harm is done to good morals, what destruction daily threatens the integrity of religion. Therefore by exhortation, by admonition. Now an admonition for authors who by an honest and holy determination combine the love of writing with a love and zeal for the Catholic cause. If they really want their works to be fruitful and worthy of praise, let them remember what is required of those who engage in controversy for a good cause. In writing they must exercise the greatest care to be moderate and prudent, but above all loving.
Love is the mother and companion of all the other virtues.
You can see that fickle suspicion and rash accusations are detrimental indeed to fraternal love. From this you can understand the injustice of those who, in favoring one political party, do not hesitate in matters of religion to accuse others of unorthodoxy. They do this only because they belong to another party, as though orthodox Catholic faith is necessarily the prerogative of this or that political party. We commend all which We have either warned against or commanded to your authority, which all whom you govern must respect and accept. This applies especially to priests who are, subject to you in their private and public lives, whether they are engaged in the duties of the sacred ministry or in teaching in the schools.