HOW THE PASSIONS DIFFER FROM ONE ANOTHER (FOUR ARTICLES)
We must now consider how the passions differ from one another: and under this head there are four points of inquiry:
(1) Whether the passions of the concupiscible part are different from those of the irascible part?
(2) Whether the contrariety of passions in the irascible part is based on the contrariety of good and evil?
(3) Whether there is any passion that has no contrary?
(4) Whether, in the same power, there are any passions, differing in species, but not contrary to one another?
Whether the passions of the concupiscible part are different from those of the irascible part?
Objection 1: It would seem that the same passions are in the irascible and concupiscible parts. For the Philosopher says (Ethic. ii, 5) that the passions of the soul are those emotions "which are followed by joy or sorrow." But joy and sorrow are in the concupiscible part. Therefore all the passions are in the concupiscible part, and not some in the irascible, others in the concupiscible part.
Objection 2: Further, on the words of Mat. 13:33, "The kingdom of heaven is like to leaven," etc., Jerome's gloss says: "We should have prudence in the reason; hatred of vice in the irascible faculty; desire of virtue, in the concupiscible part." But hatred is in the concupiscible faculty, as also is love, of which it is the contrary, as is stated in Topic. ii, 7. Therefore the same passion is in the concupiscible and irascible faculties.
Objection 3: Further, passions and actions differ specifically according to their objects. But the objects of the irascible and concupiscible passions are the same, viz. good and evil. Therefore the same passions are in the irascible and concupiscible faculties.
On the contrary, The acts of the different powers differ in species; for instance, to see, and to hear. But the irascible and the concupiscible are two powers into which the sensitive appetite is divided, as stated in the FP, Q[81], A[2]. Therefore, since the passions are movements of the sensitive appetite, as stated above (Q[22], A[3]), the passions of the irascible faculty are specifically distinct from those of the concupiscible part.
I answer that, The passions of the irascible part differ in species from those of the concupiscible faculty. For since different powers have different objects, as stated in the FP, Q[77], A[3], the passions of different powers must of necessity be referred to different objects. Much more, therefore, do the passions of different faculties differ in species; since a greater difference in the object is required to diversify the species of the powers, than to diversify the species of passions or actions. For just as in the physical order, diversity of genus arises from diversity in the potentiality of matter, while diversity of species arises from diversity of form in the same matter; so in the acts of the soul, those that belong to different powers, differ not only in species but also in genus, while acts and passions regarding different specific objects, included under the one common object of a single power, differ as the species of that genus.
In order, therefore, to discern which passions are in the irascible, and which in the concupiscible, we must take the object of each of these powers. For we have stated in the FP, Q[81], A[2], that the object of the concupiscible power is sensible good or evil, simply apprehended as such, which causes pleasure or pain. But, since the soul must, of necessity, experience difficulty or struggle at times, in acquiring some such good, or in avoiding some such evil, in so far as such good or evil is more than our animal nature can easily acquire or avoid; therefore this very good or evil, inasmuch as it is of an arduous or difficult nature, is the object of the irascible faculty. Therefore whatever passions regard good or evil absolutely, belong to the concupiscible power; for instance, joy, sorrow, love, hatred, and such like: whereas those passions which regard good or bad as arduous, through being difficult to obtain or avoid, belong to the irascible faculty; such are daring, fear, hope and the like.
Reply to Objection 1: As stated in the FP, Q[81], A[2], the irascible faculty is bestowed on animals, in order to remove the obstacles that hinder the concupiscible power from tending towards its object, either by making some good difficult to obtain, or by making some evil hard to avoid. The result is that all the irascible passions terminate in the concupiscible passions: and thus it is that even the passions which are in the irascible faculty are followed by joy and sadness which are in the concupiscible faculty.
Reply to Objection 2: Jerome ascribes hatred of vice to the irascible faculty, not by reason of hatred, which is properly a concupiscible passion; but on account of the struggle, which belongs to the irascible power.
Reply to Objection 3: Good, inasmuch as it is delightful, moves the concupiscible power. But if it prove difficult to obtain, from this very fact it has a certain contrariety to the concupiscible power: and hence the need of another power tending to that good. The same applies to evil. And this power is the irascible faculty. Consequently the concupiscible passions are specifically different from the irascible passions.
Whether the contrariety of the irascible passions is based on the contrariety of good and evil?
Objection 1: It would seem that the contrariety of the irascible passions is based on no other contrariety than that of good and evil. For the irascible passions are ordained to the concupiscible passions, as stated above (A[1], ad 1). But the contrariety of the concupiscible passions is no other than that of good and evil; take, for instance, love and hatred, joy and sorrow. Therefore the same applies to the irascible passions.
Objection 2: Further, passions differ according to their objects; just as movements differ according to their termini. But there is no other contrariety of movements, except that of the termini, as is stated in Phys. v, 3. Therefore there is no other contrariety of passions, save that of the objects. Now the object of the appetite is good or evil. Therefore in no appetitive power can there be contrariety of passions other than that of good and evil.
Objection 3: Further, "every passion of the soul is by way of approach and withdrawal," as Avicenna declares in his sixth book of Physics. Now approach results from the apprehension of good; withdrawal, from the apprehension of evil: since just as "good is what all desire" (Ethic. i, 1), so evil is what all shun. Therefore, in the passions of the soul, there can be no other contrariety than that of good and evil.
On the contrary, Fear and daring are contrary to one another, as stated in Ethic. iii, 7. But fear and daring do not differ in respect of good and evil: because each regards some kind of evil. Therefore not every contrariety of the irascible passions is that of good and evil.
I answer that, Passion is a kind of movement, as stated in Phys. iii, 3. Therefore contrariety of passions is based on contrariety of movements or changes. Now there is a twofold contrariety in changes and movements, as stated in Phys. v, 5. One is according to approach and withdrawal in respect of the same term: and this contrariety belongs properly to changes, i.e. to generation, which is a change "to being," and to corruption, which is a change "from being." The other contrariety is according to opposition of termini, and belongs properly to movements: thus whitening, which is movement from black to white, is contrary to blackening, which is movement from white to black.
Accordingly there is a twofold contrariety in the passions of the soul: one, according to contrariety of objects, i.e. of good and evil; the other, according to approach and withdrawal in respect of the same term. In the concupiscible passions the former contrariety alone is to be found; viz. that which is based on the objects: whereas in the irascible passions, we find both forms of contrariety. The reason of this is that the object of the concupiscible faculty, as stated above (A[1]), is sensible good or evil considered absolutely. Now good, as such, cannot be a term wherefrom, but only a term whereto, since nothing shuns good as such; on the contrary, all things desire it. In like manner, nothing desires evil, as such; but all things shun it: wherefore evil cannot have the aspect of a term whereto, but only of a term wherefrom. Accordingly every concupiscible passion in respect of good, tends to it, as love, desire and joy; while every concupiscible passion in respect of evil, tends from it, as hatred, avoidance or dislike, and sorrow. Wherefore, in the concupiscible passions, there can be no contrariety of approach and withdrawal in respect of the same object.
On the other hand, the object of the irascible faculty is sensible good or evil, considered not absolutely, but under the aspect of difficulty or arduousness. Now the good which is difficult or arduous, considered as good, is of such a nature as to produce in us a tendency to it, which tendency pertains to the passion of "hope"; whereas, considered as arduous or difficult, it makes us turn from it; and this pertains to the passion of "despair." In like manner the arduous evil, considered as an evil, has the aspect of something to be shunned; and this belongs to the passion of "fear": but it also contains a reason for tending to it, as attempting something arduous, whereby to escape being subject to evil; and this tendency is called "daring." Consequently, in the irascible passions we find contrariety in respect of good and evil (as between hope and fear): and also contrariety according to approach and withdrawal in respect of the same term (as between daring and fear).
From what has been said the replies to the objections are evident.