17 For these reasons it is unlawful either to weigh true morality against conflicting expediency, or common morality, which is cultivated by those who wish to be considered good men, against what is profitable; but we every-day people must observe and live up to that moral right which comes within the range of our comprehension as jealously as the truly wise men have to observe and live up to that which is morally right in the technical and true sense of the word. For otherwise we cannot maintain such progress as we have made in the direction of virtue.
So much for those who have won a reputation for being good men by their careful observance of duty.
Moral rectitude and apparent expediency.
18 Those, on the other hand, who measure everything by a standard of profits and personal advantage and refuse to have these outweighed by considerations of moral rectitude are accustomed, in considering any question, to weigh the morally right against what they think the expedient; good men are not. And so I believe that when Panaetius stated that people were accustomed to hesitate to do such weighing, he meant precisely what he said—merely that "such was their custom," not that such was their duty. And he gave it no approval; for it is most immoral to think more highly of the apparently expedient than of the morally right, or even to set these over against each other and to hesitate to choose between them.
Occasion for doubt.
What, then, is it that may sometimes give room for a doubt and seem to call for consideration? It is, I believe, when a question arises as to the character of an action under consideration. 19 For it often happens, owing to exceptional circumstances, that what is accustomed under ordinary circumstances to be considered morally wrong is found not to be morally wrong. For the sake of illustration, let us assume some particular case that admits of wider application: what more atrocious crime can there be than to kill a fellow-man, and especially an intimate friend? But if anyone kills a tyrant—be he never so intimate a friend—he has not laden his soul with guilt, has he? The Roman People, at all events, are not of that opinion; for of all glorious deeds they hold such an one to be the most noble. Has expediency, then, prevailed over moral rectitude? Not at all; moral rectitude has gone hand in hand with expediency.
Need of a rule for guidance.
Some general rule, therefore, should be laid down to enable us to decide without error, whenever what we call the expedient seems to clash with what we feel to be morally right; and if we follow that rule in comparing courses of conduct, we shall never swerve from the path of duty. 20 That rule, moreover, shall be in perfect harmony with the Stoics' system and doctrines. It is their teachings that I am following in these books, and for this reason: the older Academicians and your Peripatetics (who were once the same as the Academicians) give what is morally right the preference over what seems expedient; and yet the discussion of these problems, if conducted by those who consider whatever is morally right also expedient and nothing expedient that is not at the same time morally right, will be more illuminating than if conducted by those who think that something not expedient may be morally right and that something not morally right may be expedient. But our New Academy allows us wide liberty, so that it is within my right to defend any theory that presents itself to me as most probable. But to return to my rule.
21 V. Detrahere igitur alteri aliquid et hominem hominis incommodo suum commodum augere magis est contra naturam quam mors, quam paupertas, quam dolor, quam cetera, quae possunt aut corpori accidere aut rebus externis. Nam principio tollit convictum humanum et societatem. Si enim sic erimus affecti, ut propter suum quisque emolumentum spoliet aut violet alterum, disrumpi necesse est, eam quae maxime est secundum naturam, humani generis societatem. 22 Ut, si unum quodque membrum sensum hunc haberet, ut posse putaret se valere, si proximi membri valetudinem ad se traduxisset, debilitari et interire totum corpus necesse esset, sic, si unus quisque nostrum ad se rapiat commoda aliorum detrahatque, quod cuique possit, emolumenti sui gratia, societas hominum et communitas evertatur necesse est. Nam sibi ut quisque malit, quod ad usum vitae pertineat, quam alteri acquirere, concessum est non repugnante natura, illud natura non patitur, ut aliorum spoliis nostras facultates, copias, opes augeamus.
23 Neque vero hoc solum natura, id est iure gentium, sed etiam legibus populorum, quibus in singulis civitatibus res publica continetur, eodem modo constitutum est, ut non liceat sui commodi causa nocere alteri; hoc enim spectant leges, hoc volunt, incolumem esse civium coniunctionem; quam qui dirimunt, eos morte, exsilio, vinclis, damno coërcent.