On the contrary, Augustine says (Confess. ii, 6) that "anger craves for revenge." But the desire for revenge is a desire for something good: since revenge belongs to justice. Therefore the object of anger is good.
Moreover, anger is always accompanied by hope, wherefore it causes pleasure, as the Philosopher says (Rhet. ii, 2). But the object of hope and of pleasure is good. Therefore good is also the object of anger.
I answer that, The movement of the appetitive power follows an act of the apprehensive power. Now the apprehensive power apprehends a thing in two ways. First, by way of an incomplex object, as when we understand what a man is; secondly, by way of a complex object, as when we understand that whiteness is in a man. Consequently in each of these ways the appetitive power can tend to both good and evil: by way of a simple and incomplex object, when the appetite simply follows and adheres to good, or recoils from evil: and such movements are desire, hope, pleasure, sorrow, and so forth: by way of a complex object, as when the appetite is concerned with some good or evil being in, or being done to, another, either seeking this or recoiling from it. This is evident in the case of love and hatred: for we love someone, in so far as we wish some good to be in him; and we hate someone, in so far as we wish some evil to be in him. It is the same with anger; for when a man is angry, he wishes to be avenged on someone. Hence the movement of anger has a twofold tendency: viz. to vengeance itself, which it desires and hopes for as being a good, wherefore it takes pleasure in it; and to the person on whom it seeks vengeance, as to something contrary and hurtful, which bears the character of evil.
We must, however, observe a twofold difference in this respect, between anger on the one side, and hatred and love on the other. The first difference is that anger always regards two objects: whereas love and hatred sometimes regard but one object, as when a man is said to love wine or something of the kind, or to hate it. The second difference is, that both the objects of love are good: since the lover wishes good to someone, as to something agreeable to himself: while both the objects of hatred bear the character of evil: for the man who hates, wishes evil to someone, as to something disagreeable to him. Whereas anger regards one object under the aspect of evil, viz. the noxious person, on whom it seeks to be avenged. Consequently it is a passion somewhat made up of contrary passions.
This suffices for the Replies to the Objections.
Whether anger is in the concupiscible faculty?
Objection 1: It would seem that anger is in the concupiscible faculty. For Cicero says (De Quaest. Tusc. iv, 9) that anger is a kind of "desire." But desire is in the concupiscible faculty. Therefore anger is too.
Objection 2: Further, Augustine says in his Rule, that "anger grows into hatred": and Cicero says (De Quaest. Tusc. iv, 9) that "hatred is inveterate anger." But hatred, like love, is a concupiscible passion. Therefore anger is in the concupiscible faculty.
Objection 3: Further, Damascene (De Fide Orth. ii, 16) and Gregory of Nyssa [*Nemesius, De Nat. Hom. xxi.] say that "anger is made up of sorrow and desire." Both of these are in the concupiscible faculty. Therefore anger is a concupiscible passion.
On the contrary, The concupiscible is distinct from the irascible faculty. If, therefore, anger were in the concupiscible power, the irascible would not take its name from it.
I answer that, As stated above (Q[23], A[1]), the passions of the irascible part differ from the passions of the concupiscible faculty, in that the objects of the concupiscible passions are good and evil absolutely considered, whereas the objects of the irascible passions are good and evil in a certain elevation or arduousness. Now it has been stated (A[2]) that anger regards two objects: viz. the vengeance that it seeks; and the person on whom it seeks vengeance; and in respect of both, anger requires a certain arduousness: for the movement of anger does not arise, unless there be some magnitude about both these objects; since "we make no ado about things that are naught or very minute," as the Philosopher observes (Rhet. ii, 2). It is therefore evident that anger is not in the concupiscible, but in the irascible faculty.
Reply to Objection 1: Cicero gives the name of desire to any kind of craving for a future good, without discriminating between that which is arduous and that which is not. Accordingly he reckons anger as a kind of desire, inasmuch as it is a desire of vengeance. In this sense, however, desire is common to the irascible and concupiscible faculties.
Reply to Objection 2: Anger is said to grow into hatred, not as though the same passion which at first was anger, afterwards becomes hatred by becoming inveterate; but by a process of causality. For anger when it lasts a long time engenders hatred.
Reply to Objection 3: Anger is said to be composed of sorrow and desire, not as though they were its parts, but because they are its causes: and it has been said above (Q[25], A[2]) that the concupiscible passions are the causes of the irascible passions.
Whether anger requires an act of reason?
Objection 1: It would seem that anger does not require an act of reason. For, since anger is a passion, it is in the sensitive appetite. But the sensitive appetite follows an apprehension, not of reason, but of the sensitive faculty. Therefore anger does not require an act of reason.
Objection 2: Further, dumb animals are devoid of reason: and yet they are seen to be angry. Therefore anger does not require an act of reason.
Objection 3: Further, drunkenness fetters the reason; whereas it is conducive to anger. Therefore anger does not require an act of reason.
On the contrary, The Philosopher says (Ethic. vii, 6) that "anger listens to reason somewhat."
I answer that, As stated above (A[2]), anger is a desire for vengeance. Now vengeance implies a comparison between the punishment to be inflicted and the hurt done; wherefore the Philosopher says (Ethic. vii, 6) that "anger, as if it had drawn the inference that it ought to quarrel with such a person, is therefore immediately exasperated." Now to compare and to draw an inference is an act of reason. Therefore anger, in a fashion, requires an act of reason.
Reply to Objection 1: The movement of the appetitive power may follow an act of reason in two ways. In the first way, it follows the reason in so far as the reason commands: and thus the will follows reason, wherefore it is called the rational appetite. In another way, it follows reason in so far as the reason denounces, and thus anger follows reason. For the Philosopher says (De Problem. xxviii, 3) that "anger follows reason, not in obedience to reason's command, but as a result of reason's denouncing the injury." Because the sensitive appetite is subject to the reason, not immediately but through the will.
Reply to Objection 2: Dumb animals have a natural instinct imparted to them by the Divine Reason, in virtue of which they are gifted with movements, both internal and external, like unto rational movements, as stated above (Q[40], A[3]).
Reply to Objection 3: As stated in Ethic. vii, 6, "anger listens somewhat to reason" in so far as reason denounces the injury inflicted, "but listens not perfectly," because it does not observe the rule of reason as to the measure of vengeance. Anger, therefore, requires an act of reason; and yet proves a hindrance to reason. Wherefore the Philosopher says (De Problem. iii, 2,27) that whose who are very drunk, so as to be incapable of the use of reason, do not get angry: but those who are slightly drunk, do get angry, through being still able, though hampered, to form a judgment of reason.
Whether anger is more natural than desire?
Objection 1: It would seem that anger is not more natural than desire. Because it is proper to man to be by nature a gentle animal. But "gentleness is contrary to anger," as the Philosopher states (Rhet. ii, 3). Therefore anger is no more natural than desire, in fact it seems to be altogether unnatural to man.