Reply Obj. 2: Every object or end has some goodness or malice, at least natural to it: but this does not imply moral goodness or malice, which is considered in relation to the reason, as stated above. And it is of this that we are here treating.
Reply Obj. 3: Not everything belonging to an action belongs also to its species. Wherefore although an action's specific nature may not contain all that belongs to the full complement of its goodness, it is not therefore an action specifically bad; nor is it specifically good. Thus a man in regard to his species is neither virtuous nor wicked. ________________________
NINTH ARTICLE [I-II, Q. 18, Art. 9]
Whether an Individual Action Can Be Indifferent?
Objection 1: It would seem that an individual action can be indifferent. For there is no species that does not, or cannot, contain an individual. But an action can be indifferent in its species, as stated above (A. 8). Therefore an individual action can be indifferent.
Obj. 2: Further, individual actions cause like habits, as stated in Ethic. ii, 1. But a habit can be indifferent: for the Philosopher says (Ethic. iv, 1) that those who are of an even temper and prodigal disposition are not evil; and yet it is evident that they are not good, since they depart from virtue; and thus they are indifferent in respect of a habit. Therefore some individual actions are indifferent.
Obj. 3: Further, moral good belongs to virtue, while moral evil belongs to vice. But it happens sometimes that a man fails to ordain a specifically indifferent action to a vicious or virtuous end. Therefore an individual action may happen to be indifferent.
On the contrary, Gregory says in a homily (vi in Evang.): "An idle word is one that lacks either the usefulness of rectitude or the motive of just necessity or pious utility." But an idle word is an evil, because "men . . . shall render an account of it in the day of judgment" (Matt. 12:36): while if it does not lack the motive of just necessity or pious utility, it is good. Therefore every word is either good or bad. For the same reason every other action is either good or bad. Therefore no individual action is indifferent.
I answer that, It sometimes happens that an action is indifferent in its species, but considered in the individual it is good or evil. And the reason of this is because a moral action, as stated above (A. 3), derives its goodness not only from its object, whence it takes its species; but also from the circumstances, which are its accidents, as it were; just as something belongs to a man by reason of his individual accidents, which does not belong to him by reason of his species. And every individual action must needs have some circumstance that makes it good or bad, at least in respect of the intention of the end. For since it belongs to the reason to direct; if an action that proceeds from deliberate reason be not directed to the due end, it is, by that fact alone, repugnant to reason, and has the character of evil. But if it be directed to a due end, it is in accord with reason; wherefore it has the character of good. Now it must needs be either directed or not directed to a due end. Consequently every human action that proceeds from deliberate reason, if it be considered in the individual, must be good or bad.
If, however, it does not proceed from deliberate reason, but from some act of the imagination, as when a man strokes his beard, or moves his hand or foot; such an action, properly speaking, is not moral or human; since this depends on the reason. Hence it will be indifferent, as standing apart from the genus of moral actions.