"Archbishop Lefebvre is a theologian, and by far superior to his own theologian, and God grant that all the [Council] Fathers might be theologians to the same degree as he is! He has a perfectly sure and refined theological habitus, to which his very great devotion to the Holy See adds that connaturality that allows him, even before discursive thinking intervenes, to discern intuitively what is and what is not compatible with the prerogatives of the Rock of the Church."

from The Catechism of the Council of Trent

BUT while the preaching of the divine Word should never be interrupted in the Church, surely in these, our days, it becomes necessary to labor with more than ordinary zeal and piety to nourish and strengthen the faithful with sound and wholesome doctrine, as with the food of life. For false prophets have gone forth into the world to corrupt the faithful with various and strange doctrines, of whom the Lord has said: "I did not send prophets, yet they ran; I spoke not to them, yet they prophesied."

In this work, to such extremes has their impiety, practiced in all the arts of Satan, been carried, that it would seem almost impossible to confine it within any bounds; and did we not rely on the splendid promises of the Savior, Who declared that He had built His Church on so solid a foundation that the gates of hell shall not prevail against it, we should have good reason to fear lest, beset on every side by such a host of enemies and assailed and attacked by so many machinations, it would, in these days, fall to the ground.