Prima Secundæ, Question 35 — Summa Theologiae
Article 1. Whether pain is a passion of the soul?
Objection 1. It would seem that pain is not a passion of the soul. Because no passion of the soul is in the body. But pain can be in the body, since Augustine says (De Vera Relig. xii), that “bodily pain is a sudden corruption of the well-being of that thing which the soul, by making evil use of it, made subject to corruption.” Therefore pain is not a passion of the soul.
Objection 2. Further, every passion of the soul belongs to the appetitive faculty. But pain does not belong to the appetitive, but rather to the apprehensive part: for Augustine says (De Nat. Boni xx) that “bodily pain is caused by the sense resisting a more powerful body.” Therefore pain is not a passion of the soul.
Objection 3. Further, every passion of the soul belongs to the animal appetite. But pain does not belong to the animal appetite, but rather to the natural appetite; for Augustine says (Gen. ad lit. viii, 14): “Had not some good remained in nature, we should feel no pain in being punished by the loss of good.” Therefore pain is not a passion of the soul.
On the contrary, Augustine (De Civ. Dei xiv, 8) reckons pain among the passions of the soul; quoting Virgil (Aeneid, vi, 733): “hence wild desires and grovelling fears/And human laughter, human tears.” [Translation: Conington.]
I answer that, Just as two things are requisite for pleasure; namely, conjunction with good and perception of this conjunction; so also two things are requisite for pain: namely, conjunction with some evil (which is in so far evil as it deprives one of some good), and perception of this conjunction. Now whatever is conjoined, if it have not the aspect of good or evil in regard to the being to which it is conjoined, cannot cause pleasure or pain. Whence it is evident that something under the aspect of good or evil is the object of the pleasure or pain. But good and evil, as such, are objects of the appetite. Consequently it is clear that pleasure and pain belong to the appetite.
Now every appetitive movement or inclination consequent to apprehension, belongs to the intellective or sensitive appetite: since the inclination of the natural appetite is not consequent to an apprehension of the subject of that appetite, but to the apprehension of another, as stated in the I:13:1; I:13:3. Since then pleasure and pain presuppose some sense or apprehension in the same subject, it is evident that pain, like pleasure, is in the intellective or sensitive appetite.
Again every movement of the sensitive appetite is called a passion, as stated above (I-II:22:3): and especially those which tend to some defect. Consequently pain, according as it is in the sensitive appetite, is most properly called a passion of the soul: just as bodily ailments are properly called passions of the body. Hence Augustine (De Civ. Dei xiv, 7,[8 [Quoting Cicero]) reckons pain especially as being a kind of ailment.
Reply to Objection 1. We speak of the body, because the cause of pain is in the body: as when we suffer something hurtful to the body. But the movement of pain is always in the soul; since “the body cannot feel pain unless the soul feel it,” as Augustine says (Super Psalm 87:4).
Reply to Objection 2. We speak of pain of the senses, not as though it were an act of the sensitive power; but because the senses are required for bodily pain, in the same way as for bodily pleasure.
Reply to Objection 3. Pain at the loss of good proves the goodness of the nature, not because pain is an act of the natural appetite, but because nature desires something as good, the removal of which being perceived, there results the passion of pain in the sensitive appetite.
Article 2. Whether sorrow is the same as pain?
Objection 1. It would seem that sorrow is not pain. For Augustine says (De Civ. Dei xiv, 7) that “pain is used to express bodily suffering.” But sorrow is used more in reference to the soul. Therefore sorrow is not pain.
Objection 2. Further, pain is only in respect of present evil. But sorrow can refer to both past and future evil: thus repentance is sorrow for the past, and anxiety for the future. Therefore sorrow is quite different from pain.
Objection 3. Further, pain seems not to follow save from the sense of touch. But sorrow can arise from all the senses. Therefore sorrow is not pain, and extends to more objects.
On the contrary, The Apostle says (Romans 9:2): “I have great sorrow [Douay: ‘sadness’] and continual pain [Douay: ‘sorrow’] in my heart,” thus denoting the same thing by sorrow and pain.
I answer that, Pleasure and pain can arise from a twofold apprehension, namely, from the apprehension of an exterior sense; and from the interior apprehension of the intellect or of the imagination. Now the interior apprehension extends to more objects than the exterior apprehension: because whatever things come under the exterior apprehension, come under the interior, but not conversely. Consequently that pleasure alone which is caused by an interior apprehension is called joy, as stated above (I-II:31:3): and in like manner that pain alone which is caused by an interior apprehension, is called sorrow. And just as that pleasure which is caused by an exterior apprehension, is called pleasure but not joy; so too that pain which is caused by an exterior apprehension, is called pain indeed but not sorrow. Accordingly sorrow is a species of pain, as joy is a species of pleasure.
Reply to Objection 1. Augustine is speaking there of the use of the word: because “pain” is more generally used in reference to bodily pains, which are better known, than in reference to spiritual pains.
Reply to Objection 2. External sense perceives only what is present; but the interior cognitive power can perceive the present, past and future. Consequently sorrow can regard present, past and future: whereas bodily pain, which follows apprehension of the external sense, can only regard something present.
Reply to Objection 3. The sensibles of touch are painful, not only in so far as they are disproportionate to the apprehensive power, but also in so far as they are contrary to nature: whereas the objects of the other senses can indeed be disproportionate to the apprehensive power, but they are not contrary to nature, save as they are subordinate to the sensibles of touch. Consequently man alone, who is a perfectly cognizant animal, takes pleasure in the objects of the other senses for their own sake; whereas other animals take no pleasure in them save as referable to the sensibles of touch, as stated in Ethic. iii, 10. Accordingly, in referring to the objects of the other senses, we do not speak of pain in so far as it is contrary to natural pleasure: but rather of sorrow, which is contrary to joy. So then if pain be taken as denoting bodily pain, which is its more usual meaning, then it is contrasted with sorrow, according to the distinction of interior and exterior apprehension; although, on the part of the objects, pleasure extends further than does bodily pain. But if pain be taken in a wide sense, then it is the genus of sorrow, as stated above.