And yet there is no one of men, not even of the lowest and of beggars, who is not capable of justice. But because they did not know what it was, from what source it proceeded, and what was its mode of operation, they assigned to a few only that highest virtue, that is, the common good of all, and said that it aimed at no advantages peculiar to itself, but only the interests of others. And not without reason was Carneades raised up, a man of the greatest talent and penetration, to refute their speech, and overthrow the justice, which had no firm foundation; not because he thought that justice was to be blamed, but that he might show that its defenders brought forward no firm or certain argument respecting justice.