Q: Whether in the Same Power, There Are Any Passions, Specifically Different, but Not Contrary to One Another?

A: On the contrary,
Love and joy differ in species, and are in the concupiscible power; and yet they are not contrary to one another; rather, in fact, one causes the other. Therefore in the same power there are passions that differ in species without being contrary to one another.

I answer that,
Passions differ in accordance with their active causes, which, in the case of the passions of the soul, are their objects. Now, the difference in active causes may be considered in two ways: first, from the point of view of their species or nature, as fire differs from water; secondly, from the point of view of the difference in their active power. In the passions of the soul we can treat the difference of their active or motive causes in respect of their motive power, as if they were natural agents. For every mover, in a fashion, either draws the patient to itself, or repels it from itself. Now in drawing it to itself, it does three things in the patient. Because, in the first place, it gives the patient an inclination or aptitude to tend to the mover: thus a light body, which is above, bestows lightness on the body generated, so that it has an inclination or aptitude to be above. Secondly, if the generated body be outside its proper place, the mover gives it movement towards that place. Thirdly, it makes it to rest, when it shall have come to its proper place: since to the same cause are due, both rest in a place, and the movement to that place. The same applies to the cause of repulsion.

Now, in the movements of the appetitive faculty, good has, as it were, a force of attraction, while evil has a force of repulsion. In the first place, therefore, good causes, in the appetitive power, a certain inclination, aptitude or connaturalness in respect of good: and this belongs to the passion of
love:
the corresponding contrary of which is
hatred
in respect of evil. Secondly, if the good be not yet possessed, it causes in the appetite a movement towards the attainment of the good beloved: and this belongs to the passion of
desire
or concupiscence: and contrary to it, in respect of evil, is the passion of
aversion
or dislike. Thirdly, when the good is obtained, it causes the appetite to rest, as it were, in the good obtained: and this belongs to the passion of
delight
or joy; the contrary of which, in respect of evil, is
sorrow
or sadness.

On the other hand, in the irascible passions, the aptitude, or inclination to seek good, or to shun evil, is presupposed as arising from the concupiscible faculty, which regards good or evil absolutely. And in respect of good not yet obtained, we have
hope
and despair. In respect of evil not yet present we have
fear
and daring. But in respect of good obtained there is no irascible passion: because it is no longer considered in the light of something arduous, as stated above (A. 3). But evil already present gives rise to the passion of
anger.

Accordingly it is clear that in the concupiscible faculty there are three couples of passions; viz. love and hatred, desire and aversion, joy and sadness. In like manner there are three groups in the irascible faculty; viz. hope and despair, fear and daring, and anger which has no contrary passion.

Consequently there are altogether eleven passions differing specifically; six in the concupiscible faculty, and five in the irascible; and under these all the passions of the soul are contained.

From this the replies to the objections are evident.

QUESTION 24

OF GOOD AND EVIL IN THE PASSIONS OF THE SOUL (In Four Articles)

We must now consider good and evil in the passions of the soul: and under this head there are four points of inquiry:

(1) Whether moral good and evil can be found in the passions of the soul?

(2) Whether every passion of the soul is morally evil?

(3) Whether every passion increases or decreases the goodness or malice of an act?

(4) Whether any passion is good or evil specifically?