BOOK V
I
Now the points for our inquiry in respect of Justice and Injustice1129a are, what kind of actions are their object-matter, and what kind of a mean state Justice is, and between what points the abstract principle of it, i.e. the Just, is a mean. And our inquiry shall be, if you please, conducted in the same method as we have observed in the foregoing parts of this treatise.
We see then that all men mean by the term Justice a moral state such that in consequence of it men have the capacity of doing what is just, and actually do it, and wish it:1 similarly also with respect to Injustice, a moral state such that in consequence of it men do unjustly and wish what is unjust: let us also be content then with these as a ground-work sketched out.
I mention the two, because the same does not hold with regard to States whether of mind or body as with regard to Sciences or Faculties: I mean that whereas it is thought that the same Faculty or Science embraces contraries, a State will not: from health, for instance, not the contrary acts are done but the healthy ones only; we say a man walks healthily when he walks as the healthy man would.
However, of the two contrary states the one may be frequently known from the other, and oftentimes the states from their subject-matter: if it be seen clearly what a good state of body is, then is it also seen what a bad state is, and from the things which belong to a good state of body the good state itself is seen, and vice versâ. If, for instance, the good state is firmness of flesh it follows that the bad state is flabbiness of flesh; and whatever causes firmness of flesh is connected with the good state.
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