"The declared enemies of God and of the Church should be defamed as much as possible, provided we don't lack the truth it is a charitable act to shout: 'Here's the wolf!' Whether he is in the flock or anywhere to be found." (St. Francis de Sales, Bishop and Doctor of the Church)
"If, however, through works they profaned the faith and don't hide themselves
covered with shame under the earth, why they get irritated against
us, who condemn with words that what they manifest with
actions? "(St. John Chrysostom)
"If the propagation and the necessity of combating evil require the employment of terms somewhat harsh against error and its supporters, this usage is certainly not against charity."
"In the writings of the great athletes of Christianity the usage of irony, imprecation, execration and of the most crushing epithets is continual."
"Popular propagation and apologetics cannot preserve elegant and constrained academic forms. In order to convince the people we must speak to their heart and their imagination which can only be touched by ardent , brilliant, and impassioned language. To be impassioned is not to be reprehensible, when our heat is the holy ardor of truth."
"It is all well enough to make war on abstract doctrines," some may say, "but in combating error, be it ever so evident, is it so proper to make an attack upon the persons of those who uphold it?" We reply that very often it is, and not only proper but at times even indispensable and meritorious before God and men."
"The accusation of indulging in personalities is not spared to Catholic apologists, and when Liberals and those tainted with Liberalism have hurled it at our heads they imagine that we are overwhelmed by the charge. But they deceive themselves. We are not so easily thrust in the back ground. We have reason and substantial reason on our side. In order to combat and discredit false ideas, we must inspire contempt and horror in the hearts of the multitude for those who seek to seduce and debauch them. A disease is inseparable from the persons of the diseased."
"(...) impartiality is not permissible when it is distorted to the offense of truth, whose rights are imprescriptible."
"Therefore to offend our neighbor for the love of God is a true act of charity. Not to offend our neighbor for the love of God is a sin."
"It is the archer and the gunner to whom we should give our first attention; save for them the fire would not be murderous."
"It is thus lawful, in certain cases, to expose the infamy of a Liberal opponent, to bring his habits into contempt, and drag his name in the mire. Yes, this is permissible, permissible in prose, in verse, in caricature, in a serious vein or in badinage, by every means and method within reach. The only restriction is not to employ a lie in the service of justice. This never."
"Whence do the Liberals derive their power to impose upon us the new obligation of fighting errors only in the abstract and of lavishing smiles and flattery upon them?" (Fr. Felix Sarda Y Salvany)