This kind of unanimity is found in good men; for they are of one mind with themselves and with each other, standing, so to speak, always on the same ground: for the wishes of such people are constant, and do not ebb and flow like the Euripus; they wish what is just and for the common interest, and make united efforts to attain it. But people who are not good cannot be of one mind, just as they cannot be friends except for a little space or to a slight extent, as they strive for more than their share of profit, but take less than their share of labours and public services: but every man, while wishing to do this himself, keeps a sharp eye upon his neighbour, and prevents him from doing it; for if they are not thus on their guard, the community is ruined. The result is that they are at discord, striving to compel one another to do what is just, but not willing to do it themselves.

Benefactors seem to love those whom they have benefited more than those who have received benefits love those who have conferred them; and as this appears irrational, people seek for the cause of this phenomenon.