Against Apion

10. There have been indeed some bad men, who have attempted to calumniate my history, and took it to be a kind of scholastic performance for the exercise of young men. A strange sort of accusation and calumny this! since every one that undertakes to deliver the history of actions truly ought to know them accurately himself in the first place, as either having been concerned in them himself, or been informed of them by such as knew them. Now both these methods of knowledge I may very properly pretend to in the composition of both my works; for, as I said, I have translated the Antiquities out of our sacred books; which I easily could do, since I was a priest by my birth, and have studied that philosophy which is contained in those writings: and for the History of the War, I wrote it as having been an actor myself in many of its transactions, an eye-witness in the greatest part of the rest, and was not unacquainted with any thing whatsoever that was either said or done in it. How impudent then must those deserve to be esteemed that undertake to contradict me about the true state of those affairs! who, although they pretend to have made use of both the emperors' own memoirs, yet could not they he acquainted with our affairs who fought against them.
11. This digression I have been obliged to make out of necessity, as being desirous to expose the vanity of those that profess to write histories; and I suppose I have sufficiently declared that this custom of transmitting down the histories of ancient times hath been better preserved by those nations which are called Barbarians, than by the Greeks themselves. I am now willing, in the next place, to say a few things to those that endeavor to prove that our constitution is but of late time, for this reason, as they pretend, that the Greek writers have said nothing about us; after which I shall produce testimonies for our antiquity out of the writings of foreigners; I shall also demonstrate that such as cast reproaches upon our nation do it very unjustly.