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

[...] for the hope that is in us: endowed with a good conscience, so that by such praiseworthy zeal, one of two things may befall us: either that we save those who separate themselves from us and (as that person called the brother of the Lord advises) snatch them from this perverse disjunction; or, if this does not succeed, that we at least obstruct their mouths by refuting them with just reasons, so that they find no opportunity to speak petulantly and rashly against the truth. And indeed, what is greater and more precious than both of these, that we ourselves may become knowing and more certain of the faith in which we stand, freely and ingenuously professing it, and knowing for what reason we turn away from its adversaries. And I truly conjecture that at the time of retribution, those who, having rightly changed their opinion, have been fitted back into the Church and firmly adhered to the truth, will receive a greater reward than those who will be found to have followed that same right faith simply and fortuitously from custom received from the fathers. For while the latter will have embraced the true faith by chance alone, it will be established that the former did so knowingly and prudently.