I answer that, A thing is said to be "general" in two ways. First, by "predication": thus "animal" is general in relation to man and horse and the like: and in this sense that which is general must needs be essentially the same as the things in relation to which it is general, for the reason that the genus belongs to the essence of the species, and forms part of its definition. Secondly a thing is said to be general "virtually"; thus a universal cause is general in relation to all its effects, the sun, for instance, in relation to all bodies that are illumined, or transmuted by its power; and in this sense there is no need for that which is "general" to be essentially the same as those things in relation to which it is general, since cause and effect are not essentially the same. Now it is in the latter sense that, according to what has been said (A[5]), legal justice is said to be a general virtue, in as much, to wit, as it directs the acts of the other virtues to its own end, and this is to move all the other virtues by its command; for just as charity may be called a general virtue in so far as it directs the acts of all the virtues to the Divine good, so too is legal justice, in so far as it directs the acts of all the virtues to the common good. Accordingly, just as charity which regards the Divine good as its proper object, is a special virtue in respect of its essence, so too legal justice is a special virtue in respect of its essence, in so far as it regards the common good as its proper object. And thus it is in the sovereign principally and by way of a mastercraft, while it is secondarily and administratively in his subjects.
However the name of legal justice can be given to every virtue, in so far as every virtue is directed to the common good by the aforesaid legal justice, which though special essentially is nevertheless virtually general. Speaking in this way, legal justice is essentially the same as all virtue, but differs therefrom logically: and it is in this sense that the Philosopher speaks.
Wherefore the Replies to the First and Second Objections are manifest.
Reply to Objection 3: This argument again takes legal justice for the virtue commanded by legal justice.
Reply to Objection 4: Every virtue strictly speaking directs its act to that virtue's proper end: that it should happen to be directed to a further end either always or sometimes, does not belong to that virtue considered strictly, for it needs some higher virtue to direct it to that end. Consequently there must be one supreme virtue essentially distinct from every other virtue, which directs all the virtues to the common good; and this virtue is legal justice.
Whether there is a particular besides a general justice?
Objection 1: It would seem that there is not a particular besides a general justice. For there is nothing superfluous in the virtues, as neither is there in nature. Now general justice directs man sufficiently in all his relations with other men. Therefore there is no need for a particular justice.
Objection 2: Further, the species of a virtue does not vary according to "one" and "many." But legal justice directs one man to another in matters relating to the multitude, as shown above (AA[5],6). Therefore there is not another species of justice directing one man to another in matters relating to the individual.
Objection 3: Further, between the individual and the general public stands the household community. Consequently, if in addition to general justice there is a particular justice corresponding to the individual, for the same reason there should be a domestic justice directing man to the common good of a household: and yet this is not the case. Therefore neither should there be a particular besides a legal justice.
On the contrary, Chrysostom in his commentary on Mat. 5:6, "Blessed are they that hunger and thirst after justice," says (Hom. xv in Matth.): "By justice He signifies either the general virtue, or the particular virtue which is opposed to covetousness."
I answer that, As stated above (A[6]), legal justice is not essentially the same as every virtue, and besides legal justice which directs man immediately to the common good, there is a need for other virtues to direct him immediately in matters relating to particular goods: and these virtues may be relative to himself or to another individual person. Accordingly, just as in addition to legal justice there is a need for particular virtues to direct man in relation to himself, such as temperance and fortitude, so too besides legal justice there is need for particular justice to direct man in his relations to other individuals.
Reply to Objection 1: Legal justice does indeed direct man sufficiently in his relations towards others. As regards the common good it does so immediately, but as to the good of the individual, it does so mediately. Wherefore there is need for particular justice to direct a man immediately to the good of another individual.
Reply to Objection 2: The common good of the realm and the particular good of the individual differ not only in respect of the "many" and the "few," but also under a formal aspect. For the aspect of the "common" good differs from the aspect of the "individual" good, even as the aspect of "whole" differs from that of "part." Wherefore the Philosopher says (Polit. i, 1) that "they are wrong who maintain that the State and the home and the like differ only as many and few and not specifically."
Reply to Objection 3: The household community, according to the Philosopher (Polit. i, 2), differs in respect of a threefold fellowship; namely "of husband and wife, father and son, master and slave," in each of which one person is, as it were, part of the other. Wherefore between such persons there is not justice simply, but a species of justice, viz. "domestic" justice, as stated in Ethic. v, 6.
Whether particular justice has a special matter?
Objection 1: It would seem that particular justice has no special matter. Because a gloss on Gn. 2:14, "The fourth river is Euphrates," says: "Euphrates signifies 'fruitful'; nor is it stated through what country it flows, because justice pertains to all the parts of the soul." Now this would not be the case, if justice had a special matter, since every special matter belongs to a special power. Therefore particular justice has no special matter.
Objection 2: Further, Augustine says (QQ. lxxxiii, qu. 61) that "the soul has four virtues whereby, in this life, it lives spiritually, viz. temperance, prudence, fortitude and justice;" and he says that "the fourth is justice, which pervades all the virtues." Therefore particular justice, which is one of the four cardinal virtues, has no special matter.
Objection 3: Further, justice directs man sufficiently in matters relating to others. Now a man can be directed to others in all matters relating to this life. Therefore the matter of justice is general and not special.
On the contrary, The Philosopher reckons (Ethic. v, 2) particular justice to be specially about those things which belong to social life.
I answer that, Whatever can be rectified by reason is the matter of moral virtue, for this is defined in reference to right reason, according to the Philosopher (Ethic. ii, 6). Now the reason can rectify not only the internal passions of the soul, but also external actions, and also those external things of which man can make use. And yet it is in respect of external actions and external things by means of which men can communicate with one another, that the relation of one man to another is to be considered; whereas it is in respect of internal passions that we consider man's rectitude in himself. Consequently, since justice is directed to others, it is not about the entire matter of moral virtue, but only about external actions and things, under a certain special aspect of the object, in so far as one man is related to another through them.
Reply to Objection 1: It is true that justice belongs essentially to one part of the soul, where it resides as in its subject; and this is the will which moves by its command all the other parts of the soul; and accordingly justice belongs to all the parts of the soul, not directly but by a kind of diffusion.
Reply to Objection 2: As stated above (FS, Q[61], AA[3],4), the cardinal virtues may be taken in two ways: first as special virtues, each having a determinate matter; secondly, as certain general modes of virtue. In this latter sense Augustine speaks in the passage quoted: for he says that "prudence is knowledge of what we should seek and avoid, temperance is the curb on the lust for fleeting pleasures, fortitude is strength of mind in bearing with passing trials, justice is the love of God and our neighbor which pervades the other virtues, that is to say, is the common principle of the entire order between one man and another."
Reply to Objection 3: A man's internal passions which are a part of moral matter, are not in themselves directed to another man, which belongs to the specific nature of justice; yet their effects, i.e. external actions, are capable of being directed to another man. Consequently it does not follow that the matter of justice is general.
Whether justice is about the passions?
Objection 1: It would seem that justice is about the passions. For the Philosopher says (Ethic. ii, 3) that "moral virtue is about pleasure and pain." Now pleasure or delight, and pain are passions, as stated above [*FS, Q[23], A[4]; FS, Q[31], A[1]; FS, Q[35], A[1]] when we were treating of the passions. Therefore justice, being a moral virtue, is about the passions.