22 But since, as Plato has admirably expressed it, we are not born for ourselves alone, but our country claims a share of our being, and our friends a share; and since, as the Stoics hold, everything that the earth produces is created for man's use; and as men, too, are born for the sake of men, that they may be able mutually to help one another; in this direction we ought to follow Nature as our guide, to contribute to the general good by an interchange of acts of kindness, by giving and receiving, and thus by our skill, our industry, and our talents to cement human society more closely together, man to man.
Good faith.
23 The foundation of justice, moreover, is good faith—that is, truth and fidelity to promises and agreements. And therefore we may follow the Stoics, who diligently investigate the etymology of words; and we may accept their statement that "good faith" is so called because what is promised is "made good," although some may find this derivation[E] rather far-fetched.
Injustice: active and passive.
There are, on the other hand, two kinds of injustice—the one, on the part of those who inflict wrong, the other on the part of those who, when they can, do not shield from wrong those upon whom it is being inflicted. For he who, under the influence of anger or some other passion, wrongfully assaults another seems, as it were, to be laying violent hands upon a comrade; but he who does not prevent or oppose wrong, if he can, is just as guilty of wrong as if he deserted his parents or his friends or his country. 24 Then, too, those very wrongs which people try to inflict on purpose to injure are often the result of fear: that is, he who premeditates injuring another is afraid that, if he does not do so, he may himself be made to suffer some hurt. But for the most part, people are led to wrong-doing in order to secure some personal end; in this vice, avarice is generally the controlling motive.
25 VIII. Expetuntur autem divitiae cum ad usus vitae necessarios, tum ad perfruendas voluptates. In quibus autem maior est animus, in iis pecuniae cupiditas spectat ad opes et ad gratificandi facultatem, ut nuper M. Crassus negabat ullam satis magnam pecuniam esse ei, qui in re publica princeps vellet esse, cuius fructibus exercitum alere non posset. Delectant etiam magnifici apparatus vitaeque cultus cum elegantia et copia; quibus rebus effectum est, ut infinita pecuniae cupiditas esset. Nec vero rei familiaris amplificatio nemini nocens vituperanda est, sed fugienda semper iniuria est.
26 Maxime autem adducuntur plerique, ut eos iustitiae capiat oblivio, cum in imperiorum, honorum, gloriae cupiditatem inciderunt.[23] Quod enim est apud Ennium:
Fab. inc. (Thyestes?) Vahlen2, 404
Núlla sancta sócietas
Néc fides regni ést,