On the False Embassy

Why have I begun by reviving these memories and quoting those old speeches? My first and chief object, men of Athens, is that, when you hear me relate some performance that seems to you atrocious and incredible, no one may ask in surprise: Then why did you not speak out and give us this information instantly?

but that, by recalling the assurances by which on every occasion these men stopped others from getting your attention, and that magnificent promise of Aeschines, you may realize that you have to thank him for this crowning injury,—that you were precluded from learning the truth promptly and at the proper time, being cheated by hopes and impostures and vain assurances.