Summa Th. II-II EN Qu.36


We must now consider envy, and under this head there are four points of inquiry:

(1) What is envy?

(2) Whether it is a sin?

(3) Whether it is a mortal sin?

(4) Whether it is a capital sin, and which are its daughters?

Whether envy is a kind of sorrow?

Objection: 1. It would seem that envy is not a kind of sorrow. For the object of envy is a good, for Gregory says (Moral. v, 46) of the envious man that "self-inflicted pain wounds the pining spirit, which is racked by the prosperity of another." Therefore envy is not a kind of sorrow.
2. Further, likeness is a cause, not of sorrow but rather of pleasure. But likeness is a cause of envy: for the Philosopher says (Rhet. ii, 10): "Men are envious of such as are like them in genus, in knowledge, in stature, in habit, or in reputation." Therefore envy is not a kind of sorrow.
3. Further, sorrow is caused by a defect, wherefore those who are in great defect are inclined to sorrow, as stated above (I-II 47,3) when we were treating of the passions. Now those who lack little, and who love honors, and who are considered wise, are envious, according to the Philosopher (Rhet. ii, 10). Therefore envy is not a kind of sorrow.
4. Further, sorrow is opposed to pleasure. Now opposite effects have not one and the same cause. Therefore, since the recollection of goods once possessed is a cause of pleasure, as stated above (I-II 32,3) it will not be a cause of sorrow. But it is a cause of envy; for the Philosopher says (Rhet. ii, 10) that "we envy those who have or have had things that befitted ourselves, or which we possessed at some time." Therefore sloth is not a kind of sorrow.

On the contrary Damascene (De Fide Orth. ii, 14) calls envy a species of sorrow, and says that "envy is sorrow for another's good."
I answer that The object of a man's sorrow is his own evil. Now it may happen that another's good is apprehended as one's own evil, and in this way sorrow can be about another's good. But this happens in two ways: First, when a man is sorry about another's good, in so far as it threatens to be an occasion of harm to himself, as when a man grieves for his enemy's prosperity, for fear lest he may do him some harm: such like sorrow is not envy, but rather an effect of fear, as the Philosopher states (Rhet. ii, 9).Secondly, another's good may be reckoned as being one's own evil, in so far as it conduces to the lessening of one's own good name or excellence. It is in this way that envy grieves for another's good: and consequently men are envious of those goods in which a good name consists, and about which men like to be honored and esteemed, as the Philosopher remarks (Rhet. ii, 10).

Reply to Objection: 1. Nothing hinders what is good for one from being reckoned as evil for another: and in this way it is possible for sorrow to be about good, as stated above.
2. Since envy is about another's good name in so far as it diminishes the good name a man desires to have, it follows that a man is envious of those only whom he wishes to rival or surpass in reputation. But this does not apply to people who are far removed from one another: for no man, unless he be out of his mind, endeavors to rival or surpass in reputation those who are far above him. Thus a commoner does not envy the king, nor does the king envy a commoner whom he is far above. Wherefore a man envies not those who are far removed from him, whether in place, time, or station, but those who are near him, and whom he strives to rival or surpass. For it is against our will that these should be in better repute than we are, and that gives rise to sorrow. On the other hand, likeness causes pleasure in so far as it is in agreement with the will.
3. A man does not strive for mastery in matters where he is very deficient; so that he does not envy one who surpasses him in such matters, unless he surpass him by little, for then it seems to him that this is not beyond him, and so he makes an effort; wherefore, if his effort fails through the other's reputation surpassing his, he grieves. Hence it is that those who love to be honored are more envious; and in like manner the faint-hearted are envious, because all things are great to them, and whatever good may befall another, they reckon that they themselves have been bested in something great. Hence it is written (Jb 5,2): "Envy slayeth the little one," and Gregory says (Moral. v, 46) that "we can envy those only whom we think better in some respect than ourselves."
4. Recollection of past goods in so far as we have had them, causes pleasure; in so far as we have lost them, causes sorrow; and in so far as others have them, causes envy, because that, above all, seems to belittle our reputation. Hence the Philosopher says (Rhet. ii) that the old envy the young, and those who have spent much in order to get something, envy those who have got it by spending little, because they grieve that they have lost their goods, and that others have acquired goods.

Whether envy is a sin?

Objection: 1. It would seem that envy is not a sin. For Jerome says to Laeta about the education of her daughter (Ep. cvii): "Let her have companions, so that she may learn together with them, envy them, and be nettled when they are praised." But no one should be advised to commit a sin. Therefore envy is not a sin
2. Further, "Envy is sorrow for another's good," as Damascene says (De Fide Orth. ii, 14). But this is sometimes praiseworthy: for it is written (Pr 29,2): "When the wicked shall bear rule, the people shall mourn." Therefore envy is not always a sin.
3. Further, envy denotes a kind of zeal. But there is a good zeal, according to Ps 68,10: "The zeal of Thy house hath eaten me up." Therefore envy is not always a sin.
4. Further, punishment is condivided with fault. But envy is a kind of punishment: for Gregory says (Moral. v, 46): "When the foul sore of envy corrupts the vanquished heart, the very exterior itself shows how forcibly the mind is urged by madness. For paleness seizes the complexion, the eyes are weighed down, the spirit is inflamed, while the limbs are chilled, there is frenzy in the heart, there is gnashing with the teeth." Therefore envy is not a sin.

On the contrary It is written (Ga 5,26): "Let us not be made desirous of vainglory, provoking one another, envying one another."
I answer that As stated above (Article [1]), envy is sorrow for another's good. Now this sorrow may come about in four ways. First, when a man grieves for another's good, through fear that it may cause harm either to himself, or to some other goods. This sorrow is not envy, as stated above (Article [1]), and may be void of sin. Hence Gregory says (Moral. xxii, 11): "It very often happens that without charity being lost, both the destruction of an enemy rejoices us, and again his glory, without any sin of envy, saddens us, since, when he falls, we believe that some are deservedly set up, and when he prospers, we dread lest many suffer unjustly."Secondly, we may grieve over another's good, not because he has it, but because the good which he has, we have not: and this, properly speaking, is zeal, as the Philosopher says (Rhet. ii, 9). And if this zeal be about virtuous goods, it is praiseworthy, according to 1Co 14,1: "Be zealous for spiritual gifts": while, if it be about temporal goods, it may be either sinful or sinless. Thirdly, one may grieve over another's good, because he who happens to have that good is unworthy of it. Such sorrow as this cannot be occasioned by virtuous goods, which make a man righteous, but, as the Philosopher states, is about riches, and those things which can accrue to the worthy and the unworthy; and he calls this sorrow (nemesis) [*The nearest equivalent is "indignation." The use of the word "nemesis" to signify "revenge" does not represent the original Greek.], saying that it belongs to good morals. But he says this because he considered temporal goods in themselves, in so far as they may seem great to those who look not to eternal goods: whereas, according to the teaching of faith, temporal goods that accrue to those who are unworthy, are so disposed according to God's just ordinance, either for the correction of those men, or for their condemnation, and such goods are as nothing in comparison with the goods to come, which are prepared for good men. Wherefore sorrow of this kind is forbidden in Holy Writ, according to Ps 36,1: "Be not emulous of evil doers, nor envy them that work iniquity," and elsewhere (Ps 72,2-3): "My steps had well nigh slipped, for I was envious of the wicked, when I saw the prosperity of sinners [*Douay: 'because I had a zeal on occasion of the wicked, seeing the prosperity of sinners']." Fourthly, we grieve over a man's good, in so far as his good surpasses ours; this is envy properly speaking, and is always sinful, as also the Philosopher states (Rhet. ii, 10), because to do so is to grieve over what should make us rejoice, viz. over our neighbor's good.

Reply to Objection: 1. Envy there denotes the zeal with which we ought to strive to progress with those who are better than we are.
2. This argument considers sorrow for another's good in the first sense given above.
3. Envy differs from zeal, as stated above. Hence a certain zeal may be good, whereas envy is always evil.
4. Nothing hinders a sin from being penal accidentally, as stated above (I-II 87,2) when we were treating of sins.

Whether envy is a mortal sin?

Objection: 1. It would seem that envy is not a mortal sin. For since envy is a kind of sorrow, it is a passion of the sensitive appetite. Now there is no mortal sin in the sensuality, but only in the reason, as Augustine declares (De Trin. xii, 12) [*Cf. I-II 74,4]. Therefore envy is not a mortal sin. Aquin.: SMT SS Question [36] Article [3] Obj. 2 Para. 1/1 OBJ 2:
2. Further, there cannot be mortal sin in infants. But envy can be in them, for Augustine says (Confess. i): "I myself have seen and known even a baby envious, it could not speak, yet it turned pale and looked bitterly on its foster-brother." Therefore envy is not a mortal sin.
3. Further, every mortal sin is contrary to some virtue. But envy is contrary, not to a virtue but to (nemesis), which is a passion, according to the Philosopher (Rhet. ii, 9). Therefore envy is not a mortal sin.

On the contrary It is written (Jb 5,2): "Envy slayeth the little one." Now nothing slays spiritually, except mortal sin. Therefore envy is a mortal sin.
I answer that Envy is a mortal sin, in respect of its genus. For the genus of a sin is taken from its object; and envy according to the aspect of its object is contrary to charity, whence the soul derives its spiritual life, according to 1Jn 3,14: "We know that we have passed from death to life, because we love the brethren." Now the object both of charity and of envy is our neighbor's good, but by contrary movements, since charity rejoices in our neighbor's good, while envy grieves over it, as stated above (Article [1]). Therefore it is evident that envy is a mortal sin in respect of its genus.Nevertheless, as stated above (Question [35], Article [4]; I-II 72,5, ad 1), in every kind of mortal sin we find certain imperfect movements in the sensuality, which are venial sins: such are the first movement of concupiscence, in the genus of adultery, and the first movement of anger, in the genus of murder, and so in the genus of envy we find sometimes even in perfect men certain first movements, which are venial sins.

Reply to Objection: 1. The movement of envy in so far as it is a passion of the sensuality, is an imperfect thing in the genus of human acts, the principle of which is the reason, so that envy of that kind is not a mortal sin. The same applies to the envy of little children who have not the use of reason:
2. wherefore the Reply to the Second Objection is manifest.
3. According to the Philosopher (Rhet. ii, 9), envy is contrary both to (nemesis) and to pity, but for different reasons. For it is directly contrary to pity, their principal objects being contrary to one another, since the envious man grieves over his neighbor's good, whereas the pitiful man grieves over his neighbor's evil, so that the envious have no pity, as he states in the same passage, nor is the pitiful man envious. On the other hand, envy is contrary to (nemesis) on the part of the man whose good grieves the envious man, for (nemesis) is sorrow for the good of the undeserving according to Ps 72,3: "I was envious of the wicked, when I saw the prosperity of sinners" [*Douay: 'because I had a zeal on occasion of the wicked, seeing the prosperity of sinners'], whereas the envious grieves over the good of those who are deserving of it. Hence it is clear that the former contrariety is more direct than the latter. Now pity is a virtue, and an effect proper to charity: so that envy is contrary to pity and charity.

Whether envy is a capital vice?

Objection: 1. It would seem that envy is not a capital vice. For the capital vices are distinct from their daughters. Now envy is the daughter of vainglory; for the Philosopher says (Rhet. ii, 10) that "those who love honor and glory are more envious." Therefore envy is not a capital vice.
2. Further, the capital vices seem to be less grave than the other vices which arise from them. For Gregory says (Moral. xxxi, 45): "The leading vices seem to worm their way into the deceived mind under some kind of pretext, but those which follow them provoke the soul to all kinds of outrage, and confuse the mind with their wild outcry." Now envy is seemingly a most grave sin, for Gregory says (Moral. v, 46): "Though in every evil thing that is done, the venom of our old enemy is infused into the heart of man, yet in this wickedness the serpent stirs his whole bowels and discharges the bane of spite fitted to enter deep into the mind." Therefore envy is not a capital sin.
3. Further, it seems that its daughters are unfittingly assigned by Gregory (Moral. xxxi, 45), who says that from envy arise "hatred, tale-bearing, detraction, joy at our neighbor's misfortunes, and grief for his prosperity." For joy at our neighbor's misfortunes and grief for his prosperity seem to be the same as envy, as appears from what has been said above (Article [3]). Therefore these should not be assigned as daughters of envy.

On the contrary On the contrary stands the authority of Gregory (Moral. xxxi, 45) who states that envy is a capital sin and assigns the aforesaid daughters thereto.
I answer that Just as sloth is grief for a Divine spiritual good, so envy is grief for our neighbor's good. Now it has been stated above (Question [35], Article [4]) that sloth is a capital vice for the reason that it incites man to do certain things, with the purpose either of avoiding sorrow or of satisfying its demands. Wherefore envy is accounted a capital vice for the same reason.

Reply to Objection: 1. As Gregory says (Moral. xxxi, 45), "the capital vices are so closely akin to one another that one springs from the other. For the first offspring of pride is vainglory, which by corrupting the mind it occupies begets envy, since while it craves for the power of an empty name, it repines for fear lest another should acquire that power." Consequently the notion of a capital vice does not exclude its originating from another vice, but it demands that it should have some principal reason for being itself the origin of several kinds of sin. However it is perhaps because envy manifestly arises from vainglory, that it is not reckoned a capital sin, either by Isidore (De Summo Bono) or by Cassian (De Instit. Caenob. v, 1).
2. It does not follow from the passage quoted that envy is the greatest of sins, but that when the devil tempts us to envy, he is enticing us to that which has its chief place in his heart, for as quoted further on in the same passage, "by the envy of the devil, death came into the world" (Sg 2,24).There is, however, a kind of envy which is accounted among the most grievous sins, viz. envy of another's spiritual good, which envy is a sorrow for the increase of God's grace, and not merely for our neighbor's good. Hence it is accounted a sin against the Holy Ghost, because thereby a man envies, as it were, the Holy Ghost Himself, Who is glorified in His works.
3. The number of envy's daughters may be understood for the reason that in the struggle aroused by envy there is something by way of beginning, something by way of middle, and something by way of term. The beginning is that a man strives to lower another's reputation, and this either secretly, and then we have "tale-bearing," or openly, and then we have "detraction." The middle consists in the fact that when a man aims at defaming another, he is either able to do so, and then we have "joy at another's misfortune," or he is unable, and then we have "grief at another's prosperity." The term is hatred itself, because just as good which delights causes love, so does sorrow cause hatred, as stated above (Question [34], Article [6]). Grief at another's prosperity is in one way the very same as envy, when, to Wit, a man grieves over another's prosperity, in so far as it gives the latter a good name, but in another way it is a daughter of envy, in so far as the envious man sees his neighbor prosper notwithstanding his efforts to prevent it. On the other hand, "joy at another's misfortune" is not directly the same as envy, but is a result thereof, because grief over our neighbor's good which is envy, gives rise to joy in his evil.


We must now consider the sins contrary to peace, and first we shall consider discord which is in the heart, secondly contention, which is on the lips, thirdly, those things which consist in deeds, viz. schism, quarrelling, war, and sedition. Under the first head there are two points of inquiry:

(1) Whether discord is a sin?

(2) Whether it is a daughter of vainglory?

Whether discord is a sin?

Objection: 1. It would seem that discord is not a sin. For to disaccord with man is to sever oneself from another's will. But this does not seem to be a sin, because God's will alone, and not our neighbor's, is the rule of our own will. Therefore discord is not a sin.
2. Further, whoever induces another to sin, sins also himself. But it appears not to be a sin to incite others to discord, for it is written (Ac 23,6) that Paul, knowing that the one part were Sadducees, and the other Pharisees, cried out in the council: "Men brethren, I am a Pharisee, the son of Pharisees, concerning the hope and resurrection of the dead I am called in question. And when he had so said, there arose a dissension between the Pharisees and the Sadducees." Therefore discord is not a sin.
3. Further, sin, especially mortal sin, is not to be found in a holy man. But discord is to be found even among holy men, for it is written (Ac 15,39): "There arose a dissension" between Paul and Barnabas, "so that they departed one from another." Therefore discord is not a sin. and least of all a mortal sin.

On the contrary "Dissensions," that is, discords, are reckoned among the works of the flesh (Ga 5,20), of which it is said afterwards (Ga 5,21) that "they who do such things shall not obtain the kingdom of God." Now nothing, save mortal sin, excludes man from the kingdom of God. Therefore discord is a mortal sin.
I answer that Discord is opposed to concord. Now, as stated above (Question [29], Articles [1],3) concord results from charity, in as much as charity directs many hearts together to one thing, which is chiefly the Divine good, secondarily, the good of our neighbor. Wherefore discord is a sin, in so far as it is opposed to this concord.But it must be observed that this concord is destroyed by discord in two ways: first, directly; secondly, accidentally. Now, human acts and movements are said to be direct when they are according to one's intention. Wherefore a man directly disaccords with his neighbor, when he knowingly and intentionally dissents from the Divine good and his neighbor's good, to which he ought to consent. This is a mortal sin in respect of its genus, because it is contrary to charity, although the first movements of such discord are venial sins by reason of their being imperfect acts.The accidental in human acts is that which occurs beside the intention. Hence when several intend a good pertaining to God's honor, or our neighbor's profit, while one deems a certain thing good, and another thinks contrariwise, the discord is in this case accidentally contrary to the Divine good or that of our neighbor. Such like discord is neither sinful nor against charity, unless it be accompanied by an error about things necessary to salvation, or by undue obstinacy, since it has also been stated above (Question [29], Articles [1],3, ad 2) that the concord which is an effect of charity, is union of wills not of opinions. It follows from this that discord is sometimes the sin of one party only, for instance, when one wills a good which the other knowingly resists; while sometimes it implies sin in both parties, as when each dissents from the other's good, and loves his own.

Reply to Objection: 1. One man's will considered in itself is not the rule of another man's will; but in so far as our neighbor's will adheres to God's will, it becomes in consequence, a rule regulated according to its proper measure. Wherefore it is a sin to disaccord with such a will, because by that very fact one disaccords with the Divine rule.
2. Just as a man's will that adheres to God is a right rule, to disaccord with which is a sin, so too a man's will that is opposed to God is a perverse rule, to disaccord with which is good. Hence to cause a discord, whereby a good concord resulting from charity is destroyed, is a grave sin: wherefore it is written (Pr 6,16): "Six things there are, which the Lord hateth, and the seventh His soul detesteth," which seventh is stated (Pr 6,19) to be "him that soweth discord among brethren." On the other hand, to arouse a discord whereby an evil concord (i.e. concord in an evil will) is destroyed, is praiseworthy. In this way Paul was to be commended for sowing discord among those who concorded together in evil, because Our Lord also said of Himself (Mt 10,34): "I came not to send peace, but the sword."
3. The discord between Paul and Barnabas was accidental and not direct: because each intended some good, yet the one thought one thing good, while the other thought something else, which was owing to human deficiency: for that controversy was not about things necessary to salvation. Moreover all this was ordained by Divine providence, on account of the good which would ensue.

Whether discord is a daughter of vainglory?

Objection: 1. It would seem that discord is not a daughter of vainglory. For anger is a vice distinct from vainglory. Now discord is apparently the daughter of anger, according to Pr 15,18: "A passionate man stirreth up strifes." Therefore it is not a daughter of vainglory.
2. Further, Augustine expounding the words of Jn 7,39, "As yet the Spirit was not given," says (Tract. xxxii) "Malice severs, charity unites." Now discord is merely a separation of wills. Therefore discord arises from malice, i.e. envy, rather than from vainglory.
3. Further, whatever gives rise to many evils, would seem to be a capital vice. Now such is discord, because Jerome in commenting on Mt 12,25, "Every kingdom divided against itself shall be made desolate," says: "Just as concord makes small things thrive, so discord brings the greatest things to ruin." Therefore discord should itself be reckoned a capital vice, rather than a daughter of vainglory.

On the contrary On the contrary stands the authority of Gregory (Moral. xxxi, 45).
I answer that Discord denotes a certain disunion of wills, in so far, to wit, as one man's will holds fast to one thing, while the other man's will holds fast to something else. Now if a man's will holds fast to its own ground, this is due to the act that he prefers what is his own to that which belongs to others, and if he do this inordinately, it is due to pride and vainglory. Therefore discord, whereby a man holds to his own way of thinking, and departs from that of others, is reckoned to be a daughter of vainglory.

Reply to Objection: 1. Strife is not the same as discord, for strife consists in external deeds, wherefore it is becoming that it should arise from anger, which incites the mind to hurt one's neighbor; whereas discord consists in a divergence in the movements of wills, which arises from pride or vainglory, for the reason given above.
2. In discord we may consider that which is the term "wherefrom," i.e. another's will from which we recede, and in this respect it arises from envy; and again we may consider that which is the term "whither," i.e. something of our own to which we cling, and in this respect it is caused by vainglory. And since in every moment the term "whither" is more important than the term "wherefrom" (because the end is of more account than the beginning), discord is accounted a daughter of vainglory rather than of envy, though it may arise from both for different reasons, as stated.
3. The reason why concord makes small things thrive, while discord brings the greatest to ruin, is because "the more united a force is, the stronger it is, while the more disunited it is the weaker it becomes" (De Causis xvii). Hence it is evident that this is part of the proper effect of discord which is a disunion of wills, and in no way indicates that other vices arise from discord, as though it were a capital vice.


We must now consider contention, in respect of which there are two points of inquiry:

(1) Whether contention is a mortal sin?

(2) Whether it is a daughter of vainglory?

Whether contention is a mortal sin?

Objection: 1. It would seem that contention is not a mortal sin. For there is no mortal sin in spiritual men: and yet contention is to be found in them, according to Lc 22,24: "And there was also a strife amongst" the disciples of Jesus, "which of them should . . . be the greatest." Therefore contention is not a mortal sin.
2. Further, no well disposed man should be pleased that his neighbor commit a mortal sin. But the Apostle says (Ph 1,17): "Some out of contention preach Christ," and afterwards he says (Ph 1,18): "In this also I rejoice, yea, and will rejoice." Therefore contention is not a mortal sin.
3. Further, it happens that people contend either in the courts or in disputations, without any spiteful purpose, and with a good intention, as, for example, those who contend by disputing with heretics. Hence a gloss on 1S 14,1, "It came to pass one day," etc. says: "Catholics do not raise contentions with heretics, unless they are first challenged to dispute." Therefore contention is not a mortal sin.
4. Further, Job seems to have contended with God, according to Jb 39,32: "Shall he that contendeth with God be so easily silenced?" And yet Job was not guilty of mortal sin, since the Lord said of him (Jb 42,7): "You have not spoken the thing that is right before me, as my servant Job hath." Therefore contention is not always a mortal sin.

On the contrary It is against the precept of the Apostle who says (2Tm 2,14): "Contend not in words." Moreover (Ga 5,20) contention is included among the works of the flesh, and as stated there (Ga 5,21) "they who do such things shall not obtain the kingdom of God." Now whatever excludes a man from the kingdom of God and is against a precept, is a mortal sin. Therefore contention is a mortal sin.
I answer that To contend is to tend against some one. Wherefore just as discord denotes a contrariety of wills, so contention signifies contrariety of speech. For this reason when a man contrasts various contrary things in a speech, this is called "contentio," which Tully calls one of the rhetorical colors (De Rhet. ad Heren. iv), where he says that "it consists in developing a speech from contrary things," for instance: "Adulation has a pleasant beginning, and a most bitter end."Now contrariety of speech may be looked at in two ways: first with regard to the intention of the contentious party, secondly, with regard to the manner of contending. As to the intention, we must consider whether he contends against the truth, and then he is to be blamed, or against falsehood, and then he should be praised. As to the manner, we must consider whether his manner of contending is in keeping with the persons and the matter in dispute, for then it would be praiseworthy, hence Tully says (De Rhet. ad Heren. iii) that "contention is a sharp speech suitable for proof and refutation"---or whether it exceeds the demands of the persons and matter in dispute, in which case it is blameworthy.Accordingly if we take contention as denoting a disclaimer of the truth and an inordinate manner, it is a mortal sin. Thus Ambrose [*Cf. Gloss. Ord. in Rom. i, 29] defines contention: "Contention is a disclaimer of the truth with clamorous confidence." If, however, contention denote a disavowal of what is false, with the proper measure of acrimony, it is praiseworthy: whereas, if it denote a disavowal of falsehood, together with an inordinate manner, it can be a venial sin, unless the contention be conducted so inordinately, as to give scandal to others. Hence the Apostle after saying (2Tm 2,14): "Contend not in words," adds, "for it is to no profit, but to the subverting of the hearers."

Reply to Objection: 1. The disciples of Christ contended together, not with the intention of disclaiming the truth, since each one stood up for what he thought was true. Yet there was inordinateness in their contention, because they contended about a matter which they ought not to have contended about, viz. the primacy of honor; for they were not spiritual men as yet, as a gloss says on the same passage; and for this reason Our Lord checked them.
2. Those who preached Christ "out of contention," were to be blamed, because, although they did not gainsay the truth of faith, but preached it, yet they did gainsay the truth, by the fact that they thought they would "raise affliction" to the Apostle who was preaching the truth of faith. Hence the Apostle rejoiced not in their contention, but in the fruit that would result therefrom, namely that Christ would be made known---since evil is sometimes the occasion of good results.
3. Contention is complete and is a mortal sin when, in contending before a judge, a man gainsays the truth of justice, or in a disputation, intends to impugn the true doctrine. In this sense Catholics do not contend against heretics, but the reverse. But when, whether in court or in a disputation, it is incomplete, i.e. in respect of the acrimony of speech, it is not always a mortal sin.
4. Contention here denotes an ordinary dispute. For Job had said (Jb 13,3): "I will speak to the Almighty, and I desire to reason with God": yet he intended not to impugn the truth, but to defend it, and in seeking the truth thus, he had no wish to be inordinate in mind or in speech.

Whether contention is a daughter of vainglory?

Objection: 1. It would seem that contention is not a daughter of vainglory. For contention is akin to zeal, wherefore it is written (1Co 3,3): "Whereas there is among you zeal [Douay: 'envying'] and contention, are you not carnal, and walk according to men?" Now zeal pertains to envy. Therefore contention arises rather from envy.
2. Further, contention is accompanied by raising of the voice. But the voice is raised on account of anger, as Gregory declares (Moral. xxxi, 14). Therefore contention too arises from anger.
3. Further, among other things knowledge seems to be the matter of pride and vainglory, according to 1Co 8,1: "Knowledge puffeth up." Now contention is often due to lack of knowledge, and by knowledge we do not impugn the truth, we know it. Therefore contention is not a daughter of vainglory.

On the contrary On the contrary stands the authority of Gregory (Moral. xxxi, 14).
I answer that As stated above (Question [37], Article [2]), discord is a daughter of vainglory, because each of the disaccording parties clings to his own opinion, rather than acquiesce with the other. Now it is proper to pride and vainglory to seek one's own glory. And just as people are discordant when they hold to their own opinion in their hearts, so are they contentious when each defends his own opinion by words. Consequently contention is reckoned a daughter of vainglory for the same reason as discord.

Reply to Objection: 1. Contention, like discord, is akin to envy in so far as a man severs himself from the one with whom he is discordant, or with whom he contends, but in so far as a contentious man holds to something, it is akin to pride and vainglory, because, to wit, he clings to his own opinion, as stated above (Question [37], Article [2], ad 1).
2. The contention of which we are speaking puts on a loud voice, for the purpose of impugning the truth, so that it is not the chief part of contention. Hence it does not follow that contention arises from the same source as the raising of the voice.
3. Pride and vainglory are occasioned chiefly by goods even those that are contrary to them, for instance, when a man is proud of his humility: for when a thing arises in this way, it does so not directly but accidentally, in which way nothing hinders one contrary from arising out of another. Hence there is no reason why the "per se" and direct effects of pride or vainglory, should not result from the contraries of those things which are the occasion of pride.

Summa Th. II-II EN Qu.36