Summa Th. II-II EN Qu.23 a.2

Whether charity is something created in the soul?

Objection: 1. It would seem that charity is not something created in the soul. For Augustine says (De Trin. viii, 7): "He that loveth his neighbor, consequently, loveth love itself." Now God is love. Therefore it follows that he loves God in the first place. Again he says (De Trin. xv, 17): "It was said: God is Charity, even as it was said: God is a Spirit." Therefore charity is not something created in the soul, but is God Himself.
2. Further, God is the life of the soul spiritually just as the soul is the life of the body, according to Dt 30,20: "He is thy life." Now the soul by itself quickens the body. Therefore God quickens the soul by Himself. But He quickens it by charity, according to 1Jn 3,14: "We know that we have passed from death to life, because we love the brethren." Therefore God is charity itself.
3. Further, no created thing is of infinite power; on the contrary every creature is vanity. But charity is not vanity, indeed it is opposed to vanity; and it is of infinite power, since it brings the human soul to the infinite good. Therefore charity is not something created in the soul.

On the contrary On the charity, Augustine says (De Doctr. Christ. iii, 10): "By charity I mean the movement of the soul towards the enjoyment of God for His own sake." But a movement of the soul is something created in the soul. Therefore charity is something created in the soul.
I answer that The Master looks thoroughly into this question in Question [17]of the First Book, and concludes that charity is not something created in the soul, but is the Holy Ghost Himself dwelling in the mind. Nor does he mean to say that this movement of love whereby we love God is the Holy Ghost Himself, but that this movement is from the Holy Ghost without any intermediary habit, whereas other virtuous acts are from the Holy Ghost by means of the habits of other virtues, for instance the habit of faith or hope or of some other virtue: and this he said on account of the excellence of charity.But if we consider the matter aright, this would be, on the contrary, detrimental to charity. For when the Holy Ghost moves the human mind the movement of charity does not proceed from this motion in such a way that the human mind be merely moved, without being the principle of this movement, as when a body is moved by some extrinsic motive power. For this is contrary to the nature of a voluntary act, whose principle needs to be in itself, as stated above (I-II 6,1): so that it would follow that to love is not a voluntary act, which involves a contradiction, since love, of its very nature, implies an act of the will.Likewise, neither can it be said that the Holy Ghost moves the will in such a way to the act of loving, as though the will were an instrument, for an instrument, though it be a principle of action, nevertheless has not the power to act or not to act, for then again the act would cease to be voluntary and meritorious, whereas it has been stated above (I-II 114,4) that the love of charity is the root of merit: and, given that the will is moved by the Holy Ghost to the act of love, it is necessary that the will also should be the efficient cause of that act.Now no act is perfectly produced by an active power, unless it be connatural to that power of reason of some form which is the principle of that action. Wherefore God, Who moves all things to their due ends, bestowed on each thing the form whereby it is inclined to the end appointed to it by Him; and in this way He "ordereth all things sweetly" (Sg 8,1). But it is evident that the act of charity surpasses the nature of the power of the will, so that, therefore, unless some form be superadded to the natural power, inclining it to the act of love, this same act would be less perfect than the natural acts and the acts of the other powers; nor would it be easy and pleasurable to perform. And this is evidently untrue, since no virtue has such a strong inclination to its act as charity has, nor does any virtue perform its act with so great pleasure. Therefore it is most necessary that, for us to perform the act of charity, there should be in us some habitual form superadded to the natural power, inclining that power to the act of charity, and causing it to act with ease and pleasure.

Reply to Objection: 1. The Divine Essence Itself is charity, even as It is wisdom and goodness. Wherefore just as we are said to be good with the goodness which is God, and wise with the wisdom which is God (since the goodness whereby we are formally good participation of Divine goodness, and the wisdom whereby we are formally wise, share of Divine wisdom), so too, the charity whereby formally we love our neighbor is a participation of Divine charity. For this manner of speaking is common among the Platonists, with whose doctrines Augustine was imbued; and the lack of adverting to this has been to some an occasion of error.
2. God is effectively the life both of the soul by charity, and of the body by the soul: but formally charity is the life of the soul, even as the soul is the life of the body. Consequently we may conclude from this that just as the soul is immediately united to the body, so is charity to the soul.
3. Charity works formally. Now the efficacy of a form depends on the power of the agent, who instills the form, wherefore it is evident that charity is not vanity. But because it produces an infinite effect, since, by justifying the soul, it unites it to God, this proves the infinity of the Divine power, which is the author of charity.

Whether charity is a virtue?

Objection: 1. It would seem that charity is not a virtue. For charity is a kind of friendship. Now philosophers do not reckon friendship a virtue, as may be gathered from Ethic. viii, 1; nor is it numbered among the virtues whether moral or intellectual. Neither, therefore, is charity a virtue.
2. Further, "virtue is the ultimate limit of power" (De Coelo et Mundo i, 11). But charity is not something ultimate, this applies rather to joy and peace. Therefore it seems that charity is not a virtue, and that this should be said rather of joy and peace.
3. Further, every virtue is an accidental habit. But charity is not an accidental habit, since it is a more excellent thing than the soul itself: whereas no accident is more excellent than its subject. Therefore charity is not a virtue.

On the contrary Augustine says (De Moribus Eccl. xi): "Charity is a virtue which, when our affections are perfectly ordered, unites us to God, for by it we love Him."
I answer that Human acts are good according as they are regulated by their due rule and measure. Wherefore human virtue which is the principle of all man's good acts consists in following the rule of human acts, which is twofold, as stated above (Question [17], Article [1]), viz. human reason and God.Consequently just as moral virtue is defined as being "in accord with right reason," as stated in Ethic. ii, 6, so too, the nature of virtue consists in attaining God, as also stated above with regard to faith, (Question [4], Article [5]) and hope (Question [17], Article [1]). Wherefore, it follows that charity is a virtue, for, since charity attains God, it unites us to God, as evidenced by the authority of Augustine quoted above.

Reply to Objection: 1. The Philosopher (Ethic. viii) does not deny that friendship is a virtue, but affirms that it is "either a virtue or with a virtue." For we might say that it is a moral virtue about works done in respect of another person, but under a different aspect from justice. For justice is about works done in respect of another person, under the aspect of the legal due, whereas friendship considers the aspect of a friendly and moral duty, or rather that of a gratuitous favor, as the Philosopher explains (Ethic. viii, 13). Nevertheless it may be admitted that it is not a virtue distinct of itself from the other virtues. For its praiseworthiness and virtuousness are derived merely from its object, in so far, to wit, as it is based on the moral goodness of the virtues. This is evident from the fact that not every friendship is praiseworthy and virtuous, as in the case of friendship based on pleasure or utility. Wherefore friendship for the virtuous is something consequent to virtue rather than a virtue. Moreover there is no comparison with charity since it is not founded principally on the virtue of a man, but on the goodness of God.
2. It belongs to the same virtue to love a man and to rejoice about him, since joy results from love, as stated above (I-II 25,2) in the treatise on the passions: wherefore love is reckoned a virtue, rather than joy, which is an effect of love. And when virtue is described as being something ultimate, we mean that it is last, not in the order of effect, but in the order of excess, just as one hundred pounds exceed sixty.
3. Every accident is inferior to substance if we consider its being, since substance has being in itself, while an accident has its being in another: but considered as to its species, an accident which results from the principles of its subject is inferior to its subject, even as an effect is inferior to its cause; whereas an accident that results from a participation of some higher nature is superior to its subject, in so far as it is a likeness of that higher nature, even as light is superior to the diaphanous body. In this way charity is superior to the soul, in as much as it is a participation of the Holy Ghost.

Whether charity is a special virtue?

Objection: 1. It would seem that charity is not a special virtue. For Jerome says: "Let me briefly define all virtue as the charity whereby we love God" [*The reference should be to Augustine, Ep. clxvii]: and Augustine says (De Moribus Eccl. xv) [*De Civ. Dei xv, 22] that "virtue is the order of love." Now no special virtue is included in the definition of virtue in general. Therefore charity is not a special virtue.
2. Further, that which extends to all works of virtue, cannot be a special virtue. But charity extends to all works of virtue, according to 1Co 13,4: "Charity is patient, is kind," etc.; indeed it extends to all human actions, according to 1Co 16,14: "Let all your things be done in charity." Therefore charity is not a special virtue.
3. Further, the precepts of the Law refer to acts of virtue. Now Augustine says (De Perfect. Human. Justit. v) that, "Thou shalt love" is "a general commandment," and "Thou shalt not covet," "a general prohibition." Therefore charity is a general virtue.

On the contrary Nothing general is enumerated together with what is special. But charity is enumerated together with special virtues, viz. hope and faith, according to 1Co 13,13: "And now there remain faith, hope, charity, these three." Therefore charity is a special virtue.
I answer that Acts and habits are specified by their objects, as shown above (I-II 18,2; I-II 54,2). Now the proper object of love is the good, as stated above (I-II 27,1), so that wherever there is a special aspect of good, there is a special kind of love. But the Divine good, inasmuch as it is the object of happiness, has a special aspect of good, wherefore the love of charity, which is the love of that good, is a special kind of love. Therefore charity is a special virtue.

Reply to Objection: 1. Charity is included in the definition of every virtue, not as being essentially every virtue, but because every virtue depends on it in a way, as we shall state further on (Articles [7],8). In this way prudence is included in the definition of the moral virtues, as explained in Ethic. ii, vi, from the fact that they depend on prudence.
2. The virtue or art which is concerned about the last end, commands the virtues or arts which are concerned about other ends which are secondary, thus the military art commands the art of horse-riding (Ethic. i). Accordingly since charity has for its object the last end of human life, viz. everlasting happiness, it follows that it extends to the acts of a man's whole life, by commanding them, not by eliciting immediately all acts of virtue.
3. The precept of love is said to be a general command, because all other precepts are reduced thereto as to their end, according to 1Tm 1,5: "The end of the commandment is charity."

Whether charity is one virtue?

Objection: 1. It would seem that charity is not one virtue. For habits are distinct according to their objects. Now there are two objects of charity---God and our neighbor---which are infinitely distant from one another. Therefore charity is not one virtue.
2. Further, different aspects of the object diversify a habit, even though that object be one in reality, as shown above (Question [17], Article [6]; I-II 54,2, ad 1). Now there are many aspects under which God is an object of love, because we are debtors to His love by reason of each one of His favors. Therefore charity is not one virtue.
3. Further, charity comprises friendship for our neighbor. But the Philosopher reckons several species of friendship (Ethic. viii, 3,11,12). Therefore charity is not one virtue, but is divided into a number of various species.

On the contrary Just as God is the object of faith, so is He the object of charity. Now faith is one virtue by reason of the unity of the Divine truth, according to Ep 4,5: "One faith." Therefore charity also is one virtue by reason of the unity of the Divine goodness.
I answer that Charity, as stated above (Article [1]) is a kind of friendship of man for God. Now the different species of friendship are differentiated, first of all, in respect of a diversity of end, and in this way there are three species of friendship, namely friendship for the useful, for the delightful, and for the virtuous; secondly, in respect of the different kinds of communion on which friendships are based; thus there is one species of friendship between kinsmen, and another between fellow citizens or fellow travellers, the former being based on natural communion, the latter on civil communion or on the comradeship of the road, as the Philosopher explains (Ethic. viii, 12).Now charity cannot be differentiated in either of these ways: for its end is one, namely, the goodness of God; and the fellowship of everlasting happiness, on which this friendship is based, is also one. Hence it follows that charity is simply one virtue, and not divided into several species.

Reply to Objection: 1. This argument would hold, if God and our neighbor were equally objects of charity. But this is not true: for God is the principal object of charity, while our neighbor is loved out of charity for God's sake.
2. God is loved by charity for His own sake: wherefore charity regards principally but one aspect of lovableness, namely God's goodness, which is His substance, according to Ps 105,1: "Give glory to the Lord for He is good." Other reasons that inspire us with love for Him, or which make it our duty to love Him, are secondary and result from the first.
3. Human friendship of which the Philosopher treats has various ends and various forms of fellowship. This does not apply to charity, as stated above: wherefore the comparison fails.

Whether charity is the most excellent of the virtues?

Objection: 1. It would seem that charity is not the most excellent of the virtues. Because the higher power has the higher virtue even as it has a higher operation. Now the intellect is higher than the will, since it directs the will. Therefore, faith, which is in the intellect, is more excellent than charity which is in the will.
2. Further, the thing by which another works seems the less excellent of the two, even as a servant, by whom his master works, is beneath his master. Now "faith . . . worketh by charity," according to Ga 5,6. Therefore faith is more excellent than charity.
3. Further, that which is by way of addition to another seems to be the more perfect of the two. Now hope seems to be something additional to charity: for the object of charity is good, whereas the object of hope is an arduous good. Therefore hope is more excellent than charity.

On the contrary It is written (1Co 13,13): "The greater of these is charity."
I answer that Since good, in human acts, depends on their being regulated by the due rule, it must needs be that human virtue, which is a principle of good acts, consists in attaining the rule of human acts. Now the rule of human acts is twofold, as stated above (Article [3]), namely, human reason and God: yet God is the first rule, whereby, even human reason must be regulated. Consequently the theological virtues, which consist in attaining this first rule, since their object is God, are more excellent than the moral, or the intellectual virtues, which consist in attaining human reason: and it follows that among the theological virtues themselves, the first place belongs to that which attains God most.Now that which is of itself always ranks before that which is by another. But faith and hope attain God indeed in so far as we derive from Him the knowledge of truth or the acquisition of good, whereas charity attains God Himself that it may rest in Him, but not that something may accrue to us from Him. Hence charity is more excellent than faith or hope, and, consequently, than all the other virtues, just as prudence, which by itself attains reason, is more excellent than the other moral virtues, which attain reason in so far as it appoints the mean in human operations or passions.

Reply to Objection: 1. The operation of the intellect is completed by the thing understood being in the intellectual subject, so that the excellence of the intellectual operation is assessed according to the measure of the intellect. On the other hand, the operation of the will and of every appetitive power is completed in the tendency of the appetite towards a thing as its term, wherefore the excellence of the appetitive operation is gauged according to the thing which is the object of the operation. Now those things which are beneath the soul are more excellent in the soul than they are in themselves, because a thing is contained according to the mode of the container (De Causis xii). On the other hand, things that are above the soul, are more excellent in themselves than they are in the soul. Consequently it is better to know than to love the things that are beneath us; for which reason the Philosopher gave the preference to the intellectual virtues over the moral virtues (Ethic. x, 7,8): whereas the love of the things that are above us, especially of God, ranks before the knowledge of such things. Therefore charity is more excellent than faith.
2. Faith works by love, not instrumentally, as a master by his servant, but as by its proper form: hence the argument does not prove.
3. The same good is the object of charity and of hope: but charity implies union with that good, whereas hope implies distance therefrom. Hence charity does not regard that good as being arduous, as hope does, since what is already united has not the character of arduous: and this shows that charity is more perfect than hope.

Whether any true virtue is possible without charity?

Objection: 1. It would seem that there can be true virtue without charity. For it is proper to virtue to produce a good act. Now those who have not charity, do some good actions, as when they clothe the naked, or feed the hungry and so forth. Therefore true virtue is possible without charity.
2. Further, charity is not possible without faith, since it comes of "an unfeigned faith," as the Apostle says (1Tm 1,5). Now, in unbelievers, there can be true chastity, if they curb their concupiscences, and true justice, if they judge rightly. Therefore true virtue is possible without charity.
3. Further, science and art are virtues, according to Ethic. vi. But they are to be found in sinners who lack charity. Therefore true virtue can be without charity.

On the contrary The Apostle says (1Co 13,3): "If I should distribute all my goods to the poor, and if I should deliver my body to be burned, and have not charity, it profiteth me nothing." And yet true virtue is very profitable, 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 no true virtue is possible without charity.
I answer that Virtue is ordered to the good, as stated above (I-II 55,4). Now the good is chiefly an end, for things directed to the end are not said to be good except in relation to the end. Accordingly, just as the end is twofold, the last end, and the proximate end, so also, is good twofold, one, the ultimate and universal good, the other proximate and particular. The ultimate and principal good of man is the enjoyment of God, according to Ps 72,28: "It is good for me to adhere to God," and to this good man is ordered by charity. Man's secondary and, as it were, particular good may be twofold: one is truly good, because, considered in itself, it can be directed to the principal good, which is the last end; while the other is good apparently and not truly, because it leads us away from the final good. Accordingly it is evident that simply true virtue is that which is directed to man's principal good; thus also the Philosopher says (Phys. vii, text. 17) that "virtue is the disposition of a perfect thing to that which is best": and in this way no true virtue is possible without charity.If, however, we take virtue as being ordered to some particular end, then we speak of virtue being where there is no charity, in so far as it is directed to some particular good. But if this particular good is not a true, but an apparent good, it is not a true virtue that is ordered to such a good, but a counterfeit virtue. Even so, as Augustine says (Contra Julian. iv, 3), "the prudence of the miser, whereby he devises various roads to gain, is no true virtue; nor the miser's justice, whereby he scorns the property of another through fear of severe punishment; nor the miser's temperance, whereby he curbs his desire for expensive pleasures; nor the miser's fortitude, whereby as Horace, says, 'he braves the sea, he crosses mountains, he goes through fire, in order to avoid poverty'" (Epis. lib, 1; Ep. i, 45). If, on the other hand, this particular good be a true good, for instance the welfare of the state, or the like, it will indeed be a true virtue, imperfect, however, unless it be referred to the final and perfect good. Accordingly no strictly true virtue is possible without charity.

Reply to Objection: 1. The act of one lacking charity may be of two kinds; one is in accordance with his lack of charity, as when he does something that is referred to that whereby he lacks charity. Such an act is always evil: thus Augustine says (Contra Julian. iv, 3) that the actions which an unbeliever performs as an unbeliever, are always sinful, even when he clothes the naked, or does any like thing, and directs it to his unbelief as end.There is, however, another act of one lacking charity, not in accordance with his lack of charity, but in accordance with his possession of some other gift of God, whether faith, or hope, or even his natural good, which is not completely taken away by sin, as stated above (Question [10], Article [4]; I-II 85,2). In this way it is possible for an act, without charity, to be generically good, but not perfectly good, because it lacks its due order to the last end.
2. Since the end is in practical matters, what the principle is in speculative matters, just as there can be no strictly true science, if a right estimate of the first indemonstrable principle be lacking, so, there can be no strictly true justice, or chastity, without that due ordering to the end, which is effected by charity, however rightly a man may be affected about other matters.
3. Science and art of their very nature imply a relation to some particular good, and not to the ultimate good of human life, as do the moral virtues, which make man good simply, as stated above (I-II 56,3). Hence the comparison fails.

Whether charity is the form of the virtues?

Objection: 1. It would seem that charity is not the true form of the virtues. Because the form of a thing is either exemplar or essential. Now charity is not the exemplar form of the other virtues, since it would follow that the other virtues are of the same species as charity: nor is it the essential form of the other virtues, since then it would not be distinct from them. Therefore it is in no way the form of the virtues.
2. Further, charity is compared to the other virtues as their root and foundation, according to Ep 3,17: "Rooted and founded in charity." Now a root or foundation is not the form, but rather the matter of a thing, since it is the first part in the making. Therefore charity is not the form of the virtues.
3. Further, formal, final, and efficient causes do not coincide with one another (Phys. ii, 7). Now charity is called the end and the mother of the virtues. Therefore it should not be called their form.

On the contrary Ambrose [*Lombard, Sent. iii, D, 23] says that charity is the form of the virtues.
I answer that In morals the form of an act is taken chiefly from the end. The reason of this is that the principal of moral acts is the will, whose object and form, so to speak, are the end. Now the form of an act always follows from a form of the agent. Consequently, in morals, that which gives an act its order to the end, must needs give the act its form. Now it is evident, in accordance with what has been said (Article [7]), that it is charity which directs the acts of all other virtues to the last end, and which, consequently, also gives the form to all other acts of virtue: and it is precisely in this sense that charity is called the form of the virtues, for these are called virtues in relation to "informed" acts.

Reply to Objection: 1. Charity is called the form of the other virtues not as being their exemplar or their essential form, but rather by way of efficient cause, in so far as it sets the form on all, in the aforesaid manner.
2. Charity is compared to the foundation or root in so far as all other virtues draw their sustenance and nourishment therefrom, and not in the sense that the foundation and root have the character of a material cause.
3. Charity is said to be the end of other virtues, because it directs all other virtues to its own end. And since a mother is one who conceives within herself and by another, charity is called the mother of the other virtues, because, by commanding them, it conceives the acts of the other virtues, by the desire of the last end.


We must now consider charity in relation to its subject, under which head there are twelve points of inquiry:

(1) Whether charity is in the will as its subject?

(2) Whether charity is caused in man by preceding acts or by a Divine infusion?

(3) Whether it is infused according to the capacity of our natural gifts?

(4) Whether it increases in the person who has it?

(5) Whether it increases by addition?

(6) Whether it increases by every act?

(7) Whether it increases indefinitely?

(8) Whether the charity of a wayfarer can be perfect?

(9) Of the various degrees of charity;

(10) Whether charity can diminish?

(11) Whether charity can be lost after it has been possessed?

(12) Whether it is lost through one mortal sin?

Whether the will is the subject of charity?

Objection: 1. It would seem that the will is not the subject of charity. For charity is a kind of love. Now, according to the Philosopher (Topic. ii, 3) love is in the concupiscible part. Therefore charity is also in the concupiscible and not in the will.
2. Further, charity is the foremost of the virtues, as stated above (Question [23], Article [6]). But the reason is the subject of virtue. Therefore it seems that charity is in the reason and not in the will.
3. Further, charity extends to all human acts, according to 1Co 16,14: "Let all your things be done in charity." Now the principle of human acts is the free-will. Therefore it seems that charity is chiefly in the free-will as its subject and not in the will.

On the contrary The object of charity is the good, which is also the object of the will. Therefore charity is in the will as its subject.
I answer that Since, as stated in the I 80,2. the appetite is twofold, namely the sensitive, and the intellective which is called the will, the object of each is the good, but in different ways: for the object of the sensitive appetite is a good apprehended by sense, whereas the object of the intellective appetite or will is good under the universal aspect of good, according as it can be apprehended by the intellect. Now the object of charity is not a sensible good, but the Divine good which is known by the intellect alone. Therefore the subject of charity is not the sensitive, but the intellective appetite, i.e. the will.

Reply to Objection: 1. The concupiscible is a part of the sensitive, not of the intellective appetite, as proved in the I 81,2: wherefore the love which is in the concupiscible, is the love of sensible good: nor can the concupiscible reach to the Divine good which is an intelligible good; the will alone can. Consequently the concupiscible cannot be the subject of charity.
2. According to the Philosopher (De Anima iii, 9), the will also is in the reason: wherefore charity is not excluded from the reason through being in the will. Yet charity is regulated, not by the reason, as human virtues are, but by God's wisdom, and transcends the rule of human reason, according to Ep 3,19: "The charity of Christ, which surpasseth all knowledge." Hence it is not in the reason, either as its subject, like prudence is, or as its rule, like justice and temperance are, but only by a certain kinship of the will to the reason.
3. As stated in the I 83,4, the free-will is not a distinct power from the will. Yet charity is not in the will considered as free-will, the act of which is to choose. For choice is of things directed to the end, whereas the will is of the end itself (Ethic. iii, 2). Hence charity, whose object is the last end, should be described as residing in the will rather than in the free-will.

Whether charity is caused in us by infusion?

Objection: 1. It would seem that charity is not caused in us by infusion. For that which is common to all creatures, is in man naturally. Now, according to Dionysius (Div. Nom. iv), the "Divine good", which is the object of charity, "is for all an object of dilection and love." Therefore charity is in us naturally, and not by infusion.
2. Further, the more lovable a thing is the easier it is to love it. Now God is supremely lovable, since He is supremely good. Therefore it is easier to love Him than other things. But we need no infused habit in order to love other things. Neither, therefore, do we need one in order to love God.
3. Further, the Apostle says (1Tm 1,5): "The end of the commandment is charity from a pure heart, and a good conscience, and an unfeigned faith." Now these three have reference to human acts. Therefore charity is caused in us from preceding acts, and not from infusion.

On the contrary The Apostle says (Rm 5,5): "The charity of God is poured forth in our hearts by the Holy Ghost, Who is given to us."
I answer that As stated above (Question [23], Article [1]), charity is a friendship of man for God, founded upon the fellowship of everlasting happiness. Now this fellowship is in respect, not of natural, but of gratuitous gifts, for, according to Rm 6,23, "the grace of God is life everlasting": wherefore charity itself surpasses our natural facilities. Now that which surpasses the faculty of nature, cannot be natural or acquired by the natural powers, since a natural effect does not transcend its cause.Therefore charity can be in us neither naturally, nor through acquisition by the natural powers, but by the infusion of the Holy Ghost, Who is the love of the Father and the Son, and the participation of Whom in us is created charity, as stated above (Question [23], Article [2]).

Reply to Objection: 1. Dionysius is speaking of the love of God, which is founded on the fellowship of natural goods, wherefore it is in all naturally. On the other hand, charity is founded on a supernatural fellowship, so the comparison fails.
2. Just as God is supremely knowable in Himself yet not to us, on account of a defect in our knowledge which depends on sensible things, so too, God is supremely lovable in Himself, in as much as He is the object of happiness. But He is not supremely lovable to us in this way, on account of the inclination of our appetite towards visible goods. Hence it is evident that for us to love God above all things in this way, it is necessary that charity be infused into our hearts.
3. When it is said that in us charity proceeds from "a pure heart, and a good conscience, and an unfeigned faith," this must be referred to the act of charity which is aroused by these things. Or again, this is said because the aforesaid acts dispose man to receive the infusion of charity. The same remark applies to the saying of Augustine (Tract. ix in prim. canon. Joan.): "Fear leads to charity," and of a gloss on Mt 1,2: "Faith begets hope, and hope charity."

Summa Th. II-II EN Qu.23 a.2