Carlo_Borromeo

“It is a certain, well- established fact that no other crime so seriously offends God and provokes His greatest wrath as the vice of heresy. Nothing contributes more to the down fall of provinces and kingdoms than this frightful pest.”

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“Certum atque exploratum, nulla alia re Deum gravius offendi, nullaque ad vehementiorem iram, quam haeresum labe provocari; nihilque rursus ad provinciarum regnorumque interitum maiores vires habere, quam teterrimam illam pestem.”

– Cited by St Pius X in Editae saepe (26th May 1910)