(b) Acts done through fear are voluntary simply and absolutely, for the act done under the impulse of fear is what the agent considers here and now as most desirable. Examples: Balbus’ surrender of his purse and Claudius’ act of contrition are just what these two men wish to do as best suited to the circumstances.
(c) Acts done through fear are involuntary in a certain respect, if the agent can retain his inclination towards the opposite of the act and still avoid what he fears; otherwise, they are in no way involuntary. Examples: Balbus retains his liking for the money taken from him by force, and hence the surrender of it to the highwayman, although voluntary, if all things are considered, is not voluntary, if only the money itself is considered. Claudius, on the contrary, retains no liking for his sins, for he knows that, if he does, he will defeat the purpose of his act of sorrow, which is to escape the pains of hell; hence, his contrition, although the result of fear, is in no respect involuntary.
45. Passion is a movement of the sensitive appetite towards its object through love, desire, hope, or its repose therein through delight. It tends towards good, as fear tends away from evil (see 117 sqq.). Passion is an obstacle to consent in the following ways: (a) it takes away voluntariness (i.e., the quality of proceeding from an internal principle with knowledge of the end of the act), whenever it is so intense as to prevent knowledge; (b) it diminishes liberty (i.e., the quality of being perfectly voluntary, or indifferent as between many acts), even when it does not prevent knowledge.
46. Spiritual appetites fortify the reason, but the opposite is true of sensible appetites; for these latter draw all the attention to things that are lower and away from those that are higher, and impede the exercise of imagination and other senses that serve the reason. In extreme and rare cases passion may be so intense as to distract from or prevent altogether the exercise of reason, or to produce insanity. Thus, we sometimes hear of persons losing their minds through affection for money, or of performing irrational deeds under the excitement of joy.
47. With reference to the will, passion is twofold. (a) It is antecedent, when it precedes the act of the will and causes it. In this case the passion arises not from the will, but from some other cause (e.g., the bodily state, as when a sick man longs for food that is forbidden). (b) Passion is consequent when it follows the act of the will and results from it. This may happen either without the will choosing the passion (as when the very vehemence with which the will desires some object causes a corresponding sensitive emotion to awaken), or because the will has deliberately aroused the emotion in order to be able the better to act through its cooperation.
48. Antecedent passion makes an act more voluntary, since it makes the will tend with greater inclination to its object; but it likewise makes an act less free, since it impedes deliberation and disturbs the power of choice. Example: A man who takes extreme delight in sports, plays voluntarily, but is less free than if he were not so immoderately inclined that way.
49. Consequent passion which results naturally from an intense act of the will does not increase the voluntariness of the act, since it is not its cause; but it does show that the act of the will is intense, for it is only that which is willed vehemently that overflows from the will and affects the emotions.
50. Consequent passion which results from the deliberate choice of the will increases the voluntariness of the act that follows, since the act is performed with greater intensity on account of the passion that has been deliberately excited.
51. What has been said about the passions that tend to sensible good can be applied also to the passions that are concerned with sensible evils, such as hatred, sadness, aversion, boldness, anger. If they are antecedent, they increase the voluntariness of an act, but diminish its freedom; and, if they cause a passing frenzy or insanity, they take away all responsibility. If they are consequent, they either increase the willingness of the act, or indicate that it is willed with great intensity.
52. Violence, or coercion, is the use of force by an external agent to compel one to do what one does not want to do. Its effects on voluntariness are: (a) it cannot affect the internal act of the will, else we should have the contradiction that the act of the will was both voluntary, as proceeding from the will, and involuntary, as proceeding from external coercion; (b) it can affect external acts, such as walking, and so make them involuntary. If a boy is driven to school, the violence makes his going involuntary, but it does not make his will not to go to school involuntary.