Gregory of Tours, The History of the Franks (Preface):
On the verge of writing the wars of kings with enemy nations, of martyrs with pagans, of the churches with heretics, I would first like to bring forth a display of my faith, so that one who reads me will not doubt that I am a Catholic. That plan has pleased me because of those, who despair of the approaching end of the world, so that the chief points of preceding times collected through chronicles and histories, and how many years there have been since the beginning of the world, may be clearly explained. But first I entreat the pardon of my readers, if I have run off the rails of grammatical art in my letters or my syllables, because I was not really educated with that skill, instead pursuing only that I may retain what is preached in the church without any recoiling or hesitation of my heart, because I know that one who is corrupted by sings is nevertheless able to obtain God’s pardon through a pure credulity.
Scribturus bella regum cum gentibus adversis, martyrum cum paganis, eclesiarum cum hereticis, prius fidem meam proferre cupio, ut qui legerit me non dubitet esse catholicum. Illud etiam placuit propter eos, qui adpropinquantem finem mundi disperant, ut, collectam per chronicas vel historias anteriorum summa, explanetur aperte, quanti ab exordio mundi sint anni. Sed prius veniam legentibus praecor, si aut in litteris aut in syllabis grammaticam artem excessero, de qua adpaene non sum inbutus; illud tantum studens, ut quod in eclesia credi praedicatur sine aliquo fugo aut cordis haesitatione reteneam, quia scio peccatis obnoxium per credulitatem puram obtinere posse veniam apud Deum.