Theodori presbyteri Rhaethensis Libellus adversus haereses quibus jam olim hypostatica duarum in Christo naturarum unio oppugnata est

[...sharpen and incite themselves to say and hear what makes for the doctrine held by them;] we, however, are so slothful and have fallen into such a state, that we do not even strive to know this very thing: wherein they differ from the Church, from what origins this war they wage against us is kindled, and who these leaders of theirs are from whom they have taken their name. Therefore, there is no reason why we should consider the effort spent on these matters to be vain and superfluous; nor, even if by the grace and clemency of God, the affairs of the Church are peaceful and tranquil, with all heresies removed and banished into the shadows of their own lairs, is it therefore right for us to cast away all care for armor and be without experience in the affairs of war, lest perhaps, with a war suddenly arising, impieted should find us naked and unprepared and destroy us. "In a favorable wind," says that Theologian Gregory, "fear shipwreck, and relying on fear as a helper, you will much less incur shipwreck." Let us be, therefore, always ready according to the command of that chief Apostle to respond with gentleness and fear to the one who asks of us a reason for our hope.