3 You must be aware, beloved sons, Venerable Brethren, of the truth which was perfectly appreciated at the Congressof Braga, that it has come to pass that the faith itself is among many indanger, and that every effort must be made, that, through ignorance orindifference, it should not fall and fail from souls, but rather that it shouldtake deep root in hearts and should bring forth in good works and the practiceof virtue a glad and plentiful sweetness of perfect fruits. Strife must be madeagainst the attempts of the enemies of truth, lest the evil stain which dropsfrom their bad example and their widely disseminated teaching should spread moreand more. Many wounds are to be healed which the dishonest toil of such men, andthe unhappiness of the times, have struck in the flocks committed to your care,many ruins are to be built up, many hardships still oppress the souls of thefaithful, which - though haply it is impossible to destroy them - may at least belightened.
Source: Pastoralis Vigilantiae (Vatican.va)