Prodicus of Ceos, and Gorgias of Leontini, and Polus of Acragas, and many others, who are so wise that they go from city to city and persuade the most aristocratic and wealthiest of the young men who can associate with any of the citizens they want without charge these men persuade them to desert the others and associate only with them instead, to pay a great deal of money up front, and, on top of that, to be grateful!