---
title: "Summa Theologica, First Half"
author: "Thomas Aquinas"
translator: "Fathers of the English Dominican Province"
languages: [en]
shelf: "Medieval"
section: 1007 of 1210
url: https://scriptura.si/works/thomas-aquinas-summa-theologica-first-half/1007/
cite: "Thomas Aquinas, tr. Fathers of the English Dominican Province, Summa Theologica, First Half, section 1007. Scriptura (scriptura.si), https://scriptura.si/works/thomas-aquinas-summa-theologica-first-half/1007/"
---

# Summa Theologica, First Half

*Thomas Aquinas, tr. Fathers of the English Dominican Province*

God and creation, human action, law and grace, then faith, hope, charity and justice.

## 1007. II–II · Q. 53, Art. 1: Whether imprudence is a sin?

Source: https://scriptura.si/works/thomas-aquinas-summa-theologica-first-half/1007/ · cite a paragraph as https://scriptura.si/works/thomas-aquinas-summa-theologica-first-half/1007/#p-N

[¶0] Whether imprudence is a sin?

[¶1] Objection 1: It would seem that imprudence is not a sin. For every sin is voluntary, according to Augustine [*De Vera Relig. xiv]; whereas imprudence is not voluntary, since no man wishes to be imprudent. Therefore imprudence is not a sin.

[¶2] Objection 2: Further, none but original sin comes to man with his birth. But imprudence comes to man with his birth, wherefore the young are imprudent; and yet it is not original sin which is opposed to original justice. Therefore imprudence is not a sin.

[¶3] Objection 3: Further, every sin is taken away by repentance. But imprudence is not taken away by repentance. Therefore imprudence is not a sin.

[¶4] On the contrary, The spiritual treasure of grace is not taken away save by sin. But it is taken away by imprudence, according to Prov. 21:20, "There is a treasure to be desired, and oil in the dwelling of the just, and the imprudent [Douay: 'foolish'] man shall spend it." Therefore imprudence is a sin.

[¶5] I answer that, Imprudence may be taken in two ways, first, as a privation, secondly, as a contrary. Properly speaking it is not taken as a negation, so as merely to signify the absence of prudence, for this can be without any sin. Taken as a privation, imprudence denotes lack of that prudence which a man can and ought to have, and in this sense imprudence is a sin by reason of a man's negligence in striving to have prudence.

[¶6] Imprudence is taken as a contrary, in so far as the movement or act of reason is in opposition to prudence: for instance, whereas the right reason of prudence acts by taking counsel, the imprudent man despises counsel, and the same applies to the other conditions which require consideration in the act of prudence. In this way imprudence is a sin in respect of prudence considered under its proper aspect, since it is not possible for a man to act against prudence, except by infringing the rules on which the right reason of prudence depends. Wherefore, if this should happen through aversion from the Divine Law, it will be a mortal sin, as when a man acts precipitately through contempt and rejection of the Divine teaching: whereas if he act beside the Law and without contempt, and without detriment to things necessary for salvation, it will be a venial sin.

[¶7] Reply to Objection 1: No man desires the deformity of imprudence, but the rash man wills the act of imprudence, because he wishes to act precipitately. Hence the Philosopher says (Ethic. vi, 5) that "he who sins willingly against prudence is less to be commended."

[¶8] Reply to Objection 2: This argument takes imprudence in the negative sense. It must be observed however that lack of prudence or of any other virtue is included in the lack of original justice which perfected the entire soul. Accordingly all such lack of virtue may be ascribed to original sin.

[¶9] Reply to Objection 3: Repentance restores infused prudence, and thus the lack of this prudence ceases; but acquired prudence is not restored as to the habit, although the contrary act is taken away, wherein properly speaking the sin of imprudence consists.

### II–II · Q. 53, Art. 2: Whether imprudence is a special sin?

[¶11] Whether imprudence is a special sin?

[¶12] Objection 1: It would seem that imprudence is not a special sin. For whoever sins, acts against right reason, i.e. against prudence. But imprudence consists in acting against prudence, as stated above (A 1). Therefore imprudence is not a special sin.

[¶13] Objection 2: Further, prudence is more akin to moral action than knowledge is. But ignorance which is opposed to knowledge, is reckoned one of the general causes of sin. Much more therefore should imprudence be reckoned among those causes.

[¶14] Objection 3: Further, sin consists in the corruption of the circumstances of virtue, wherefore Dionysius says (Div. Nom. iv) that "evil results from each single defect." Now many things are requisite for prudence; for instance, reason, intelligence docility, and so on, as stated above (QQ 48,49). Therefore there are many species of imprudence, so that it is not a special sin.

[¶15] On the contrary, Imprudence is opposed to prudence, as stated above (A 1). Now prudence is a special virtue. Therefore imprudence too is one special vice.

[¶16] I answer that, A vice or sin may be styled general in two ways; first, absolutely, because, to wit, it is general in respect of all sins; secondly, because it is general in respect of certain vices, which are its species. In the first way, a vice may be said to be general on two counts: first, essentially, because it is predicated of all sins: and in this way imprudence is not a general sin, as neither is prudence a general virtue: since it is concerned with special acts, namely the very acts of reason: secondly, by participation; and in this way imprudence is a general sin: for, just as all the virtues have a share of prudence, in so far as it directs them, so have all vices and sins a share of imprudence, because no sin can occur, without some defect in an act of the directing reason, which defect belongs to imprudence.

[¶17] If, on the other hand, a sin be called general, not simply but in some particular genus, that is, as containing several species of sin, then imprudence is a general sin. For it contains various species in three ways. First, by opposition to the various subjective parts of prudence, for just as we distinguish the prudence that guides the individual, from other kinds that govern communities, as stated above (Q 48; Q 50, A 7 ), so also we distinguish various kinds of imprudence. Secondly, in respect of the quasi-potential parts of prudence, which are virtues connected with it, and correspond to the several acts of reason. Thus, by defect of "counsel" to which {euboulia} (deliberating well) corresponds, "precipitation" or "temerity" is a species of imprudence; by defect of "judgment," to which {synesis} (judging well according to common law) and {gnome} (judging well according to general law) refer, there is "thoughtlessness"; while "inconstancy" and "negligence" correspond to the "command" which is the proper act of prudence. Thirdly, this may be taken by opposition to those things which are requisite for prudence, which are the quasi-integral parts of prudence. Since however all these things are intended for the direction of the aforesaid three acts of reason, it follows that all the opposite defects are reducible to the four parts mentioned above. Thus incautiousness and incircumspection are included in "thoughtlessness"; lack of docility, memory, or reason is referable to "precipitation"; improvidence, lack of intelligence and of shrewdness, belong to "negligence" and "inconstancy."

[¶18] Reply to Objection 1: This argument considers generality by participation.

[¶19] Reply to Objection 2: Since knowledge is further removed from morality than prudence is, according to their respective proper natures, it follows that ignorance has the nature of mortal sin, not of itself, but on account either of a preceding negligence, or of the consequent result, and for this reason it is reckoned one of the general causes of sin. On the other hand imprudence, by its very nature, denotes a moral vice; and for this reason it can be called a special sin.

[¶20] Reply to Objection 3: When various circumstances are corrupted for the same motive, the species of sin is not multiplied: thus it is the same species of sin to take what is not one's own, where one ought not, and when one ought not. If, however, there be various motives, there are various species: for instance, if one man were to take another's property from where he ought not, so as to wrong a sacred place, this would constitute the species called sacrilege, while if another were to take another's property when he ought not, merely through the lust of possession, this would be a case of simple avarice. Hence the lack of those things which are requisite for prudence, does not constitute a diversity of species, except in so far as they are directed to different acts of reason, as stated above.