But their situation and mine is not the same, for they, opening the old histories and chronicles could as if gathering from some great meadow, weave some small crown at least for their work. As for me, what shall I do, who, having no predecessor, have, as the saying is, the worst possible master, namely myself, and yet I must acknowledge that Eusebius Pamphilus in the ten books of his Church History has been of the utmost assistance, and the works of various among those of whom we are to write, often testify to the dates of their authors. And so I pray the Lord Jesus, that what your Cicero, who stood at the summit of Roman eloquence, did not scorn to do, compiling in his Brutus, a catalogue of Latin orators, this I too may accomplish in the enumeration of ecclesiastical writers, and accomplish in a fashion worthy of the exhortation which you made. But if, perchance any of those who are yet writing have been overlooked by me in this volume, they ought to ascribe it to themselves, rather than to me, for among those whom I have not read, I could not, in the first place, know those who concealed their own writings, and, in the second place, what is perhaps well known to others, would be quite unknown to me in this out of the way corner of the earth. But surely when they are distinguished by their writings, they will not very greatly grieve over any loss in our non-mention of them. Let Celsus, Porphyry, and Julian learn, rabid as they are against Christ, let their followers, they who think the church has had no philosophers or orators or men of learning, learn how many and what sort of men founded, built and adorned it, and cease to accuse our faith of such rustic simplicity, and recognize rather their own ignorance.