Summa Theologica by Saint Thomas Aquinas (whitelam books .TXT) 📕

Whether Prudence Is a Virtue?

Objection 1: It would seem that prudence is not a virtue. For Augustine says (De Lib. Arb. i, 13) that "prudence is the science of what to desire and what to avoid." Now science is condivided with virtue, as appears in the Predicaments (vi). Therefore prudence is not a virtue.

Obj. 2: Further, there is no virtue of a virtue: but "there is a virtue of art," as the Philosopher states (Ethic. vi, 5): wherefore art is not a virtue. Now there is prudence in art, for it is written (2 Paralip. ii, 14) concerning Hiram, that he knew "to grave all sort of graving, and to devise ingeniously (prudenter) all that there may be need of in the work." Therefore prudence is not a virtue.

Obj. 3: Further, no virtue can be immoderate. But prudence is immoderate, else it would be useless to say (Prov. 23:4): "Set bounds to thy prudence." Therefore prudence is not a virtue.

On the contrary, Gregory states (Moral. ii, 49) that prudence, temperance, fortitude and justice are four virtues.

I answer that, As stated above (I-II, Q. 55, A. 3; Q. 56, A. 1) when we were treating of virtues in general, "virtue is that which makes its possessor good, and his work good likewise." Now good may be understood in a twofold sense: first, materially, for the thing that is good, secondly, formally, under the aspect of good. Good, under the aspect of good, is the object of the appetitive power. Hence if any habits rectify the consideration of reason, without regarding the rectitude of the appetite, they have less of the nature of a virtue since they direct man to good materially, that is to say, to the thing which is good, but without considering it under the aspect of good. On the other hand those virtues which regard the rectitude of the appetite, have more of the nature of virtue, because they consider the good not only materially, but also formally, in other words, they consider that which is good under the aspect of good.

Now it belongs to prudence, as stated above (A. 1, ad 3; A. 3) to apply right reason to action, and this is not done without a right appetite. Hence prudence has the nature of virtue not only as the other intellectual virtues have it, but also as the moral virtues have it, among which virtues it is enumerated.

Reply Obj. 1: Augustine there takes science in the broad sense for any kind of right reason.

Reply Obj. 2: The Philosopher says that there is a virtue of art, because art does not require rectitude of the appetite; wherefore in order that a man may make right use of his art, he needs to have a virtue which will rectify his appetite. Prudence however has nothing to do with the matter of art, because art is both directed to a particular end, and has fixed means of obtaining that end. And yet, by a kind of comparison, a man may be said to act prudently in matters of art. Moreover in certain arts, on account of the uncertainty of the means for obtaining the end, there is need for counsel, as for instance in the arts of medicine and navigation, as stated in Ethic. iii, 3.

Reply Obj. 3: This saying of the wise man does not mean that prudence itself should be moderate, but that moderation must be imposed on other things according to prudence. _______________________

FIFTH ARTICLE [II-II, Q. 47, Art. 5]

Whether Prudence Is a Special Virtue?

Objection 1: It would seem that prudence is not a special virtue. For no special virtue is included in the definition of virtue in general, since virtue is defined (Ethic. ii, 6) "an elective habit that follows a mean appointed by reason in relation to ourselves, even as a wise man decides." Now right reason is reason in accordance with prudence, as stated in Ethic. vi, 13. Therefore prudence is not a special virtue.

Obj. 2: Further, the Philosopher says (Ethic. vi, 13) that "the effect of moral virtue is right action as regards the end, and that of prudence, right action as regards the means." Now in every virtue certain things have to be done as means to the end. Therefore prudence is in every virtue, and consequently is not a special virtue.

Obj. 3: Further, a special virtue has a special object. But prudence has not a special object, for it is right reason "applied to action" (Ethic. vi, 5); and all works of virtue are actions. Therefore prudence is not a special virtue.

On the contrary, It is distinct from and numbered among the other virtues, for it is written (Wis. 8:7): "She teacheth temperance and prudence, justice and fortitude."

I answer that, Since acts and habits take their species from their objects, as shown above (I-II, Q. 1, A. 3; Q. 18, A. 2; Q. 54, A. 2), any habit that has a corresponding special object, distinct from other objects, must needs be a special habit, and if it be a good habit, it must be a special virtue. Now an object is called special, not merely according to the consideration of its matter, but rather according to its formal aspect, as explained above (I-II, Q. 54, A. 2, ad 1). Because one and the same thing is the subject matter of the acts of different habits, and also of different powers, according to its different formal aspects. Now a yet greater difference of object is requisite for a difference of powers than for a difference of habits, since several habits are found in the same power, as stated above (I-II, Q. 54, A. 1). Consequently any difference in the aspect of an object, that requires a difference of powers, will a fortiori require a difference of habits.

Accordingly we must say that since prudence is in the reason, as stated above (A. 2), it is differentiated from the other intellectual virtues by a material difference of objects. Wisdom, knowledge and understanding are about necessary things, whereas art and prudence are about contingent things, art being concerned with things made, that is, with things produced in external matter, such as a house, a knife and so forth; and prudence, being concerned with things done, that is, with things that have their being in the doer himself, as stated above (I-II, Q. 57, A. 4). On the other hand prudence is differentiated from the moral virtues according to a formal aspect distinctive of powers, i.e. the intellective power, wherein is prudence, and the appetitive power, wherein is moral virtue. Hence it is evident that prudence is a special virtue, distinct from all other virtues.

Reply Obj. 1: This is not a definition of virtue in general, but of moral virtue, the definition of which fittingly includes an intellectual virtue, viz., prudence, which has the same matter in common with moral virtue; because, just as the subject of moral virtue is something that partakes of reason, so moral virtue has the aspect of virtue, in so far as it partakes of intellectual virtue.

Reply Obj. 2: This argument proves that prudence helps all the virtues, and works in all of them; but this does not suffice to prove that it is not a special virtue; for nothing prevents a certain genus from containing a species which is operative in every other species of that same genus, even as the sun has an influence over all bodies.

Reply Obj. 3: Things done are indeed the matter of prudence, in so far as they are the object of reason, that is, considered as true: but they are the matter of the moral virtues, in so far as they are the object of the appetitive power, that is, considered as good. _______________________

SIXTH ARTICLE [II-II, Q. 47, Art. 6]

Whether Prudence Appoints the End to Moral Virtues?

Objection 1: It would seem that prudence appoints the end to moral virtues. Since prudence is in the reason, while moral virtue is in the appetite, it seems that prudence stands in relation to moral virtue, as reason to the appetite. Now reason appoints the end to the appetitive power. Therefore prudence appoints the end to the moral virtues.

Obj. 2: Further, man surpasses irrational beings by his reason, but he has other things in common with them. Accordingly the other parts of man are in relation to his reason, what man is in relation to irrational creatures. Now man is the end of irrational creatures, according to Polit. i, 3. Therefore all the other parts of man are directed to reason as to their end. But prudence is "right reason applied to action," as stated above (A. 2). Therefore all actions are directed to prudence as their end. Therefore prudence appoints the end to all moral virtues.

Obj. 3: Further, it belongs to the virtue, art, or power that is concerned about the end, to command the virtues or arts that are concerned about the means. Now prudence disposes of the other moral virtues, and commands them. Therefore it appoints their end to them.

On the contrary, The Philosopher says (Ethic. vi, 12) that "moral virtue ensures the rectitude of the intention of the end, while prudence ensures the rectitude of the means." Therefore it does not belong to prudence to appoint the end to moral virtues, but only to regulate the means.

I answer that, The end of moral virtues is human good. Now the good of the human soul is to be in accord with reason, as Dionysius declares (Div. Nom. iv). Wherefore the ends of moral virtue must of necessity pre-exist in the reason.

Now, just as, in the speculative reason, there are certain things naturally known, about which is understanding, and certain things of which we obtain knowledge through them, viz. conclusions, about which is science, so in the practical reason, certain things pre-exist, as naturally known principles, and such are the ends of the moral virtues, since the end is in practical matters what principles are in speculative matters, as stated above (Q. 23, A. 7, ad 2; I-II, Q. 13, A. 3); while certain things are in the practical reason by way of conclusions, and such are the means which we gather from the ends themselves. About these is prudence, which applies universal principles to the particular conclusions of practical matters. Consequently it does not belong to prudence to appoint the end to moral virtues, but only to regulate the means.

Reply Obj. 1: Natural reason known by the name of synderesis appoints the end to moral virtues, as stated above (I, Q. 79, A. 12): but prudence does not do this for the reason given above.

This suffices for the Reply to the Second Objection.

Reply Obj. 3: The end concerns the moral virtues, not as though they appointed the end, but because they tend to the end which is appointed by natural reason. In this they are helped by prudence, which prepares the way for them, by disposing the means. Hence it follows that prudence is more excellent than the moral virtues, and moves them: yet synderesis moves prudence, just as the understanding of principles moves science. _______________________

SEVENTH ARTICLE [II-II, Q. 47, Art. 7]

Whether It Belongs to Prudence to Find the Mean in Moral Virtues?

Objection 1: It would seem that it does not belong to prudence to find the mean in moral virtues. For the achievement of the mean is the end of moral virtues. But prudence does not appoint the end to moral virtues, as shown above (A. 6). Therefore it does not find the mean in them.

Obj. 2: Further, that which of itself has being, would seem to have no cause, but its very being is its cause, since a thing is said to have being by reason of its cause. Now "to follow the mean" belongs to moral virtue by reason of itself, as part of its definition, as shown above (A. 5, Obj. 1). Therefore prudence does not cause the mean in moral virtues.

Obj. 3: Further, prudence works after the manner of reason. But moral virtue tends to the mean after the manner of nature, because, as Tully states (De Invent. Rhet. ii, 53), "virtue is a habit like a second nature in accord with reason." Therefore prudence does not appoint the mean to moral virtues.

On the contrary, In the foregoing definition of moral virtue (A. 5, Obj. 1) it is stated that it "follows a mean appointed by reason . . . even as a wise man decides."

I answer that, The proper end of each moral virtue consists precisely in conformity with right reason. For temperance intends that man should not stray from reason for the sake of his concupiscences; fortitude, that he should not stray from the