This work (by https://lucianofsamosata.info/wiki), identified by Frank Redmond, is free of known copyright restrictions.

//Diogenes.// But look you, it is all so easy; it is within every man’s reach. No education is necessary, no nonsensical argumentation. I offer you a short cut to Glory. You may be the merest clown — cobbler, fishmonger, carpenter, money-changer; yet there is nothing to prevent your becoming famous. Given brass and boldness, you have only to learn to wag your tongue with dexterity.