Summa Th. III EN Qu.88 a.2

Whether sins that have been forgiven, return through ingratitude which is shown especially in four kinds of sin?

Objection: 1. It would seem that sins do not return through ingratitude, which is shown especially in four kinds of sin, viz., hatred of one's neighbor, apostasy from faith, contempt of confession and regret for past repentance, and which have been expressed in the following verse:"Fratres odit, apostata fit, spernitque, fateri, Poenituisse piget, pristina culpa redit." For the more grievous the sin committed against God after one has received the grace of pardon, the greater the ingratitude. But there are sins more grievous than these, such as blasphemy against God, and the sin against the Holy Ghost. Therefore it seems that sins already pardoned do not return through ingratitude as manifested in these sins, any more than as shown in other sins.
2. Further, Rabanus says: "God delivered the wicked servant to the torturers, until he should pay the whole debt, because a man will be deemed punishable not only for the sins he commits after Baptism, but also for original sin which was taken away when he was baptized." Now venial sins are reckoned among our debts, since we pray in their regard: "Forgive us our trespasses [debita]." Therefore they too return through ingratitude; and, in like manner seemingly, sins already pardoned return through venial sins, and not only through those sins mentioned above.
3. Further, ingratitude is all the greater, according as one sins after receiving a greater favor. Now innocence whereby one avoids sin is a Divine favor, for Augustine says (Confess. ii): "Whatever sins I have avoided committing, I owe it to Thy grace." Now innocence is a greater gift, than even the forgiveness of all sins. Therefore the first sin committed after innocence is no less an ingratitude to God, than a sin committed after repentance, so that seemingly ingratitude in respect of the aforesaid sins is not the chief cause of sins returning.

On the contrary Gregory says (Moral. xviii [*Cf. Dial. iv]): "It is evident from the words of the Gospel that if we do not forgive from our hearts the offenses committed against us, we become once more accountable for what we rejoiced in as forgiven through Penance": so that ingratitude implied in the hatred of one's brother is a special cause of the return of sins already forgiven: and the same seems to apply to the others.
I answer that As stated above (Article [1]), sins pardoned through Penance are said to return, in so far as their debt of punishment, by reason of ingratitude, is virtually contained in the subsequent sin. Now one may be guilty of ingratitude in two ways: first by doing something against the favor received, and, in this way, man is ungrateful to God in every mortal sin whereby he offends God Who forgave his sins, so that by every subsequent mortal sin, the sins previously pardoned return, on account of the ingratitude. Secondly, one is guilty of ingratitude, by doing something not only against the favor itself, but also against the form of the favor received. If this form be considered on the part of the benefactor, it is the remission of something due to him; wherefore he who does not forgive his brother when he asks pardon, and persists in his hatred, acts against this form. If, however, this form be taken in regard to the penitent who receives this favor, we find on his part a twofold movement of the free-will. The first is the movement of the free-will towards God, and is an act of faith quickened by charity; and against this a man acts by apostatizing from the faith. The second is a movement of the free-will against sin, and is the act of penance. This act consists first, as we have stated above (Question [85], Articles [2],5) in man's detestation of his past sins; and against this a man acts when he regrets having done penance. Secondly, the act of penance consists in the penitent purposing to subject himself to the keys of the Church by confession, according to Ps 31,5: "I said: I will confess against myself my injustice to the Lord: and Thou hast forgiven the wickedness of my sin": and against this a man acts when he scorns to confess as he had purposed to do.Accordingly it is said that the ingratitude of sinners is a special cause of the return of sins previously forgiven.

Reply to Objection: 1. This is not said of these sins as though they were more grievous than others, but because they are more directly opposed to the favor of the forgiveness of sin.
2. Even venial sins and original sin return in the way explained above, just as mortal sins do, in so far as the favor conferred by God in forgiving those sins is despised. A man does not, however, incur ingratitude by committing a venial sin, because by sinning venially man does not act against God, but apart from Him, wherefore venial sins nowise cause the return of sins already forgiven.
3. A favor can be weighed in two ways. First by the quantity of the favor itself, and in this way innocence is a greater favor from God than penance, which is called the second plank after shipwreck (cf. Question [84], Article [6]). Secondly, a favor may be weighed with regard to the recipient, who is less worthy, wherefore a greater favor is bestowed on him, so that he is the more ungrateful if he scorns it. In this way the favor of the pardon of sins is greater when bestowed on one who is altogether unworthy, so that the ingratitude which follows is all the greater.

Whether the debt of punishment that arises through ingratitude in respect of a subsequent sin is as great as that of the sins previously pardoned?

Objection: 1. It would seem that the debt of punishment arising through ingratitude in respect of a subsequent sin is as great as that of the sins previously pardoned. Because the greatness of the favor of the pardon of sins is according to the greatness of the sin pardoned, and so too, in consequence, is the greatness of the ingratitude whereby this favor is scorned. But the greatness of the consequent debt of punishment is in accord with the greatness of the ingratitude. Therefore the debt of punishment arising through ingratitude in respect of a subsequent sin is as great as the debt of punishment due for all the previous sins.
2. Further, it is a greater sin to offend God than to offend man. But a slave who is freed by his master returns to the same state of slavery from which he was freed, or even to a worse state. Much more therefore he that sins against God after being freed from sin, returns to the debt of as great a punishment as he had incurred before.
3. Further, it is written (Mt 18,34) that "his lord being angry, delivered him" (whose sins returned to him on account of his ingratitude) "to the torturers, until he paid all the debt." But this would not be so unless the debt of punishment incurred through ingratitude were as great as that incurred through all previous sins. Therefore an equal debt of punishment returns through ingratitude.

On the contrary It is written (Dt 25,2): "According to the measure of the sin shall the measure also of the stripes be," whence it is evident that a great debt of punishment does not arise from a slight sin. But sometimes a subsequent mortal sin is much less grievous than any one of those previously pardoned. Therefore the debt of punishment incurred through subsequent sins is not equal to that of sins previously forgiven.
I answer that Some have maintained that the debt of punishment incurred through ingratitude in respect of a subsequent sin is equal to that of the sins previously pardoned, in addition to the debt proper to this subsequent sin. But there is no need for this, because, as stated above (Article [1]), the debt of punishment incurred by previous sins does not return on account of a subsequent sin, as resulting from the acts of the subsequent sin. Wherefore the amount of the debt that returns must be according to the gravity of the subsequent sin.It is possible, however, for the gravity of the subsequent sin to equal the gravity of all previous sins. But it need not always be so, whether we speak of the gravity which a sin has from its species (since the subsequent sin may be one of simple fornication, while the previous sins were adulteries, murders, or sacrileges); or of the gravity which it incurs through the ingratitude connected with it. For it is not necessary that the measure of ingratitude should be exactly equal to the measure of the favor received, which latter is measured according to the greatness of the sins previously pardoned. Because it may happen that in respect of the same favor, one man is very ungrateful, either on account of the intensity of his scorn for the favor received, or on account of the gravity of the offense committed against the benefactor, while another man is slightly ungrateful, either because his scorn is less intense, or because his offense against the benefactor is less grave. But the measure of ingratitude is proportionately equal to the measure of the favor received: for supposing an equal contempt of the favor, or an equal offense against the benefactor, the ingratitude will be so much the greater, as the favor received is greater.Hence it is evident that the debt of punishment incurred by a subsequent sin need not always be equal to that of previous sins; but it must be in proportion thereto, so that the more numerous or the greater the sins previously pardoned, the greater must be the debt of punishment incurred by any subsequent mortal sin whatever.

Reply to Objection: 1. The favor of the pardon of sins takes its absolute quantity from the quantity of the sins previously pardoned: but the sin of ingratitude does not take its absolute quantity from the measure of the favor bestowed, but from the measure of the contempt or of the offense, as stated above: and so the objection does not prove.
2. A slave who has been given his freedom is not brought back to his previous state of slavery for any kind of ingratitude, but only when this is grave.
3. He whose forgiven sins return to him on account of subsequent ingratitude, incurs the debt for all, in so far as the measure of his previous sins is contained proportionally in his subsequent ingratitude, but not absolutely, as stated above.

Whether the ingratitude whereby a subsequent sin causes the return of previous sins, is a special sin?

Objection: 1. It would seem that the ingratitude, whereby a subsequent sin causes the return of sins previously forgiven, is a special sin. For the giving of thanks belongs to counterpassion which is a necessary condition of justice, as the Philosopher shows (Ethic. v, 5). But justice is a special virtue. Therefore this ingratitude is a special sin.
2. Further, Tully says (De Inv. Rhet. ii) that thanksgiving is a special virtue. But ingratitude is opposed to thanksgiving. Therefore ingratitude is a special sin.
3. Further, a special effect proceeds from a special cause. Now ingratitude has a special effect, viz. the return, after a fashion, of sins already forgiven. Therefore ingratitude is a special sin.

On the contrary That which is a sequel to every sin is not a special sin. Now by any mortal sin whatever, a man becomes ungrateful to God, as evidenced from what has been said (Article [1]). Therefore ingratitude is not a special sin.
I answer that The ingratitude of the sinner is sometimes a special sin; and sometimes it is not, but a circumstance arising from all mortal sins in common committed against God. For a sin takes its species according to the sinner's intention, wherefore the Philosopher says (Ethic. v, 2) that "he who commits adultery in order to steal is a thief rather than an adulterer."If, therefore, a sinner commits a sin in contempt of God and of the favor received from Him, that sin is drawn to the species of ingratitude, and in this way a sinner's ingratitude is a special sin. If, however, a man, while intending to commit a sin, e.g. murder or adultery, is not withheld from it on account of its implying contempt of God, his ingratitude will not be a special sin, but will be drawn to the species of the other sin, as a circumstance thereof. And, as Augustine observes (De Nat. et Grat. xxix), not every sin implies contempt of God in His commandments. Therefore it is evident that the sinner's ingratitude is sometimes a special sin, sometimes not.

Reply to Objection: 1. This suffices for the Replies to the Objections: for the first (three) objections prove that ingratitude is in itself a special sin; while the last objection proves that ingratitude, as included in every sin, is not a special sin.


We must now consider the recovery of virtues by means of Penance, under which head there are six points of inquiry:

(1) Whether virtues are restored through Penance?

(2) Whether they are restored in equal measure?

(3) Whether equal dignity is restored to the penitent?

(4) Whether works of virtue are deadened by subsequent sin?

(5) Whether works deadened by sin revive through Penance?

(6) Whether dead works, i.e. works that are done without charity, are quickened by Penance?

Whether the virtues are restored through Penance?

Objection: 1. It would seem that the virtues are not restored through penance. Because lost virtue cannot be restored by penance, unless penance be the cause of virtue. But, since penance is itself a virtue, it cannot be the cause of all the virtues, and all the more, since some virtues naturally precede penance, viz., faith, hope, and charity, as stated above (Question [85], Article [6]). Therefore the virtues are not restored through penance.
2. Further, Penance consists in certain acts of the penitent. But the gratuitous virtues are not caused through any act of ours: for Augustine says (De Lib. Arb. ii, 18: In Ps 118) that "God forms the virtues in us without us." Therefore it seems that the virtues are not restored through Penance.
3. Further, he that has virtue performs works of virtue with ease and pleasure: wherefore the Philosopher says (Ethic. i, 8) that "a man is not just if he does not rejoice in just deeds." Now many penitents find difficulty in performing deeds of virtue. Therefore the virtues are not restored through Penance.

On the contrary We read (Lc 15,22) that the father commanded his penitent son to be clothed in "the first robe," which, according to Ambrose (Expos. in Luc. vii), is the "mantle of wisdom," from which all the virtues flow together, according to Sg 8,7: "She teacheth temperance, and prudence, and justice, and fortitude, which are such things as men can have nothing more profitable in life." Therefore all the virtues are restored through Penance.
I answer that Sins are pardoned through Penance, as stated above (Question [86], Article [1]). But there can be no remission of sins except through the infusion of grace. Wherefore it follows that grace is infused into man through Penance. Now all the gratuitous virtues flow from grace, even as all the powers result from the essence of the soul; as stated in the I-II 110,4, ad 1. Therefore all the virtues are restored through Penance.

Reply to Objection: 1. Penance restores the virtues in the same way as it causes grace, as stated above (Question [86], Article [1]). Now it is a cause of grace, in so far as it is a sacrament, because, in so far as it is a virtue, it is rather an effect of grace. Consequently it does not follow that penance, as a virtue, needs to be the cause of all the other virtues, but that the habit of penance together with the habits of the other virtues is caused through the sacrament of Penance.
2. In the sacrament of Penance human acts stand as matter, while the formal power of this sacrament is derived from the power of the keys. Consequently the power of the keys causes grace and virtue effectively indeed, but instrumentally; and the first act of the penitent, viz., contrition, stands as ultimate disposition to the reception of grace, while the subsequent acts of Penance proceed from the grace and virtues which are already there.
3. As stated above (Question [86], Article [5]), sometimes after the first act of Penance, which is contrition, certain remnants of sin remain, viz. dispositions caused by previous acts, the result being that the penitent finds difficulty in doing deeds of virtue. Nevertheless, so far as the inclination itself of charity and of the other virtues is concerned, the penitent performs works of virtue with pleasure and ease. even as a virtuous man may accidentally find it hard to do an act of virtue, on account of sleepiness or some indisposition of the body.

Whether, after Penance, man rises again to equal virtue?

Objection: 1. It would seem that, after Penance, man rises again to equal virtue. For the Apostle says (Rm 8,28): "To them that love God all things work together unto good," whereupon a gloss of Augustine says that "this is so true that, if any such man goes astray and wanders from the path, God makes even this conduce to his good." But this would not be true if he rose again to lesser virtue. Therefore it seems that a penitent never rises again to lesser virtue.
2. Further, Ambrose says [*Cf. Hypognosticon iii, an anonymous work falsely ascribed to St. Augustine] that "Penance is a very good thing, for it restores every defect to a state of perfection." But this would not be true unless virtues were recovered in equal measure. Therefore equal virtue is always recovered through Penance.
3. Further, on Gn 1,5: "There was evening and morning, one day," a gloss says: "The evening light is that from which we fall the morning light is that to which we rise again." Now the morning light is greater than the evening light. Therefore a man rises to greater grace or charity than that which he had before; which is confirmed by the Apostle's words (Rm 5,20): "Where sin abounded, grace did more abound."

On the contrary Charity whether proficient or perfect is greater than incipient charity. But sometimes a man falls from proficient charity, and rises again to incipient charity. Therefore man always rises again to less virtue.
I answer that As stated above (Question [86], Article [6], ad 3; Question [89], Article [1], ad 2), the movement of the free-will, in the justification of the ungodly, is the ultimate disposition to grace; so that in the same instant there is infusion of grace together with the aforesaid movement of the free-will, as stated in the I-II 113,5 I-II 113,7, which movement includes an act of penance, as stated above (Question [86], Article [2]). But it is evident that forms which admit of being more or less, become intense or remiss, according to the different dispositions of the subject, as stated in the I-II 52,1 I-II 52,2; I-II 66,1. Hence it is that, in Penance, according to the degree of intensity or remissness in the movement of the free-will, the penitent receives greater or lesser grace. Now the intensity of the penitent's movement may be proportionate sometimes to a greater grace than that from which man fell by sinning, sometimes to an equal grace, sometimes to a lesser. Wherefore the penitent sometimes arises to a greater grace than that which he had before, sometimes to an equal, sometimes to a lesser grace: and the same applies to the virtues, which flow from grace.

Reply to Objection: 1. The very fact of falling away from the love of God by sin, does not work unto the good of all those who love God, which is evident in the case of those who fall and never rise again, or who rise and fall yet again; but only to the good of "such as according to His purpose are called to be saints," viz. the predestined, who, however often they may fall, yet rise again finally. Consequently good comes of their falling, not that they always rise again to greater grace, but that they rise to more abiding grace, not indeed on the part of grace itself, because the greater the grace, the more abiding it is, but on the part of man, who, the more careful and humble he is, abides the more steadfastly in grace. Hence the same gloss adds that "their fall conduces to their good, because they rise more humble and more enlightened."
2. Penance, considered in itself, has the power to bring all defects back to perfection, and even to advance man to a higher state; but this is sometimes hindered on the part of man, whose movement towards God and in detestation of sin is too remiss, just as in Baptism adults receive a greater or a lesser grace, according to the various ways in which they prepare themselves.
3. This comparison of the two graces to the evening and morning light is made on account of a likeness of order, since the darkness of night follows after the evening light, and the light of day after the light of morning, but not on account of a likeness of greater or lesser quantity. Again, this saying of the Apostle refers to the grace of Christ, which abounds more than any number of man's sins. Nor is it true of all, that the more their sins abound, the more abundant grace they receive, if we measure habitual grace by the quantity. Grace is, however, more abundant, as regards the very notion of grace, because to him who sins more a more "gratuitous" favor is vouchsafed by his pardon; although sometimes those whose sins abound, abound also in sorrow, so that they receive a more abundant habit of grace and virtue, as was the case with Magdalen.To the argument advanced in the contrary sense it must be replied that in one and the same man proficient grace is greater than incipient grace, but this is not necessarily the case in different men, for one begins with a greater grace than another has in the state of proficiency: thus Gregory says (Dial. ii, 1): "Let all, both now and hereafter, acknowledge how perfectly the boy Benedict turned to the life of grace from the very beginning."

Whether, by Penance, man is restored to his former dignity?

Objection: 1. It would seem that man is not restored by Penance to his former dignity: because a gloss on Amos 5:2, "The virgin of Israel is cast down," observes: "It is not said that she cannot rise up, but that the virgin of Israel shall not rise; because the sheep that has once strayed, although the shepherd bring it back on his shoulder, has not the same glory as if it had never strayed." Therefore man does not, through Penance, recover his former dignity.
2. Further, Jerome says: "Whoever fail to preserve the dignity of the sacred order, must be content with saving their souls; for it is a difficult thing to return to their former degree." Again, Pope Innocent I says (Ep. vi ad Agapit.) that "the canons framed at the council of Nicaea exclude penitents from even the lowest orders of clerics." Therefore man does not, through Penance, recover his former dignity.
3. Further, before sinning a man can advance to a higher sacred order. But this is not permitted to a penitent after his sin, for it is written (Ez 44,10 Ez 44,13): "The Levites that went away . . . from Me . . . shall never [Vulg.: 'not'] come near to Me, to do the office of priest": and as laid down in the Decretals (Dist. 1Ch 52), and taken from the council of Lerida: "If those who serve at the Holy Altar fall suddenly into some deplorable weakness of the flesh, and by God's mercy do proper penance, let them return to their duties, yet so as not to receive further promotion." Therefore Penance does not restore man to his former dignity.

On the contrary As we read in the same Distinction, Gregory writing to Secundinus (Regist. vii) says: "We consider that when a man has made proper satisfaction, he may return to his honorable position": and moreover we read in the acts of the council of Agde: "Contumacious clerics, so far as their position allows, should be corrected by their bishops. so that when Penance has reformed them, they may recover their degree and dignity."
I answer that By sin, man loses a twofold dignity, one in respect of God, the other in respect of the Church. In respect of God he again loses a twofold dignity. one is his principal dignity, whereby he was counted among the children of God, and this he recovers by Penance, which is signified (Lc 15) in the prodigal son, for when he repented, his father commanded that the first garment should be restored to him, together with a ring and shoes. The other is his secondary dignity, viz. innocence, of which, as we read in the same chapter, the elder son boasted saying (Lc 15,29): "Behold, for so many years do I serve thee, and I have never transgressed thy commandments": and this dignity the penitent cannot recover. Nevertheless he recovers something greater sometimes; because as Gregory says (Hom. de centum Ovibus, 34 in Evang.), "those who acknowledge themselves to have strayed away from God, make up for their past losses, by subsequent gains: so that there is more joy in heaven on their account, even as in battle, the commanding officer thinks more of the soldier who, after running away, returns and bravely attacks the foe, than of one who has never turned his back, but has done nothing brave."By sin man loses his ecclesiastical dignity, because thereby he becomes unworthy of those things which appertain to the exercise of the ecclesiastical dignity. This he is debarred from recovering: First, because he fails to repent; wherefore Isidore wrote to the bishop Masso, and as we read in the Distinction quoted above (Objection [3]): "The canons order those to be restored to their former degree, who by repentance have made satisfaction for their sins, or have made worthy confession of them. On the other hand, those who do not mend their corrupt and wicked ways are neither allowed to exercise their order, nor received to the grace of communion."Secondly, because he does penance negligently, wherefore it is written in the same Distinction (OBJ 3): "We can be sure that those who show no signs of humble compunction, or of earnest prayer, who avoid fasting or study, would exercise their former duties with great negligence if they were restored to them."Thirdly, if he has committed a sin to which an irregularity is attached; wherefore it is said in the same Distinction (Objection [3]), quoting the council of Pope Martin [*Martin, bishop of Braga]: "If a man marry a widow or the relict of another, he must not be admitted to the ranks of the clergy: and if he has succeeded in creeping in, he must be turned out. In like manner, if anyone after Baptism be guilty of homicide, whether by deed, or by command, or by counsel, or in self-defense." But this is in consequence not of sin, but of irregularity.Fourthly, on account of scandal, wherefore it is said in the same Distinction (Objection [3]): "Those who have been publicly convicted or caught in the act of perjury, robbery, fornication, and of such like crimes, according to the prescription of the sacred canons must be deprived of the exercise of their respective orders, because it is a scandal to God's people that such persons should be placed over them. But those who commit such sins occultly and confess them secretly to a priest, may be retained in the exercise of their respective orders, with the assurance of God's merciful forgiveness, provided they be careful to expiate their sins by fasts and alms, vigils and holy deeds." The same is expressed (Extra, De Qual. Ordinand.): "If the aforesaid crimes are not proved by a judicial process, or in some other way made notorious, those who are guilty of them must not be hindered, after they have done penance, from exercising the orders they have received, or from receiving further orders, except in cases of homicide."

Reply to Objection: 1. The same is to be said of the recovery of virginity as of the recovery of innocence which belongs to man's secondary dignity in the sight of God.
2. In these words Jerome does not say that it is impossible, but that it is difficult, for man to recover his former dignity after having sinned, because this is allowed to none but those who repent perfectly, as stated above. To those canonical statutes, which seem to forbid this, Augustine replies in his letter to Boniface (Ep. clxxxv): "If the law of the Church forbids anyone, after doing penance for a crime, to become a cleric, or to return to his clerical duties, or to retain them the intention was not to deprive him of the hope of pardon, but to preserve the rigor of discipline; else we should have to deny the keys given to the Church, of which it was said: 'Whatsoever you shall loose on earth shall be loosed in heaven.'" And further on he adds: "For holy David did penance for his deadly crimes, and yet he retained his dignity; and Blessed Peter by shedding most bitter tears did indeed repent him of having denied his Lord, and yet he remained an apostle. Nevertheless we must not deem the care of later teachers excessive, who without endangering a man's salvation, exacted more from his humility, having, in my opinion, found by experience, that some assumed a pretended repentance through hankering after honors and power."
3. This statute is to be understood as applying to those who do public penance, for these cannot be promoted to a higher order. For Peter, after his denial, was made shepherd of Christ's sheep, as appears from Jn 21,21, where Chrysostom comments as follows: "After his denial and repentance Peter gives proof of greater confidence in Christ: for whereas, at the supper, he durst not ask Him, but deputed John to ask in his stead, afterwards he was placed at the head of his brethren, and not only did not depute another to ask for him, what concerned him, but henceforth asks the Master instead of John."

Whether virtuous deeds done in charity can be deadened?

Objection: 1. It would seem that virtuous deeds done in charity cannot be deadened. For that which is not cannot be changed. But to be deadened is to be changed from life to death. Since therefore virtuous deeds, after being done, are no more, it seems that they cannot afterwards be deadened.
2. Further, by virtuous deeds done in charity, man merits eternal life. But to take away the reward from one who has merited it is an injustice, which cannot be ascribed to God. Therefore it is not possible for virtuous deeds done in charity to be deadened by a subsequent sin.
3. Further, the strong is not corrupted by the weak. Now works of charity are stronger than any sins, because, as it is written (Pr 10,12), "charity covereth all sins." Therefore it seems that deeds done in charity cannot be deadened by a subsequent mortal sin.

On the contrary It is written (Ez 18,24): "If the just man turn himself away from his justice . . . all his justices which he hath done shall not be remembered."
I answer that A living thing, by dying, ceases to have vital operations: for which reason, by a kind of metaphor, a thing is said to be deadened when it is hindered from producing its proper effect or operation.Now the effect of virtuous works, which are done in charity, is to bring man to eternal life; and this is hindered by a subsequent mortal sin, inasmuch as it takes away grace. Wherefore deeds done in charity are said to be deadened by a subsequent mortal sin.

Reply to Objection: 1. Just as sinful deeds pass as to the act but remain as to guilt, so deeds done in charity, after passing, as to the act, remain as to merit, in so far as they are acceptable to God. It is in this respect that they are deadened, inasmuch as man is hindered from receiving his reward.
2. There is no injustice in withdrawing the reward from him who has deserved it, if he has made himself unworthy by his subsequent fault, since at times a man justly forfeits through his own fault, even that which he has already received.
3. It is not on account of the strength of sinful deeds that deeds, previously done in charity, are deadened, but on account of the freedom of the will which can be turned away from good to evil.

Whether deeds deadened by sin, are revived by Penance?

Objection: 1. It would seem that deeds deadened by sin are not revived by Penance. Because just as past sins are remitted by subsequent Penance, so are deeds previously done in charity, deadened by subsequent sin. But sins remitted by Penance do not return, as stated above (Question [88], Articles [1],2). Therefore it seems that neither are dead deeds revived by charity.
2. Further, deeds are said to be deadened by comparison with animals who die, as stated above (Article [4]). But a dead animal cannot be revived. Therefore neither can dead works be revived by Penance.
3. Further, deeds done in charity are deserving of glory according to the quantity of grace or charity. But sometimes man arises through Penance to lesser grace or charity. Therefore he does not receive glory according to the merit of his previous works; so that it seems that deeds deadened by sin are not revived.

On the contrary on Joel 2:25, "I will restore to you the years, which the locust . . . hath eaten," a gloss says: "I will not suffer to perish the fruit which you lost when your soul was disturbed." But this fruit is the merit of good works which was lost through sin. Therefore meritorious deeds done before are revived by Penance.
I answer that Some have said that meritorious works deadened by subsequent sin are not revived by the ensuing Penance, because they deemed such works to have passed away, so that they could not be revived. But that is no reason why they should not be revived: because they are conducive to eternal life (wherein their life consists) not only as actually existing, but also after they cease to exist actually, and as abiding in the Divine acceptance. Now, they abide thus, so far as they are concerned, even after they have been deadened by sin, because those works, according as they were done, will ever be acceptable to God and give joy to the saints, according to Apoc. 3:11: "Hold fast that which thou hast, that no man take thy crown." That they fail in their efficacy to bring the man, who did them, to eternal life, is due to the impediment of the supervening sin whereby he is become unworthy of eternal life. But this impediment is removed by Penance, inasmuch as sins are taken away thereby. Hence it follows that deeds previously deadened, recover, through Penance, their efficacy in bringing him, who did them, to eternal life, and, in other words, they are revived. It is therefore evident that deadened works are revived by Penance.

Reply to Objection: 1. The very works themselves of sin are removed by Penance, so that, by God's mercy, no further stain or debt of punishment is incurred on their account: on the other hand, works done in charity are not removed by God, since they abide in His acceptance, but they are hindered on the part of the man who does them; wherefore if this hindrance, on the part of the man who does those works, be removed, God on His side fulfills what those works deserved.
2. Deeds done in charity are not in themselves deadened, as explained above, but only with regard to a supervening impediment on the part of the man who does them. On the other hand, an animal dies in itself, through being deprived of the principle of life: so that the comparison fails.
3. He who, through Penance, arises to lesser charity, will receive the essential reward according to the degree of charity in which he is found. Yet he will have greater joy for the works he had done in his former charity, than for those which he did in his subsequent charity: and this joy belongs to the accidental reward.

Summa Th. III EN Qu.88 a.2