Thomas Aquinas, Scriptum super Sententiis I d.17 q.1 a.1 (Parma vol. VI, 1856, archive.org sanctithomaeaqu06thom; text located via Corpus Thomisticum)
To the first the procedure is as follows. It seems that charity is not something created in the soul. For an agent which works without a medium is more perfect than one which acts only through a medium. But the Holy Spirit works in us both the willing and the accomplishing in meritorious acts, according to the Apostle: 'For whoever are led by the Spirit of God, these are the sons of God' (Romans 8:14). Therefore, since he is the most perfect agent, it seems that he does not move us to this working through any created habit as a medium.
Likewise, as the soul stands to the body as its life, so God stands to the soul, as Augustine says. But the soul does not quicken the body through any intermediate form. Therefore neither does the Holy Spirit quicken the soul through an intermediate habit.
Further, the being of grace is more immediately and more nearly from God than the being of nature. But God used no medium in creation, when he instituted nature. Therefore neither does he in re-creation, when he infuses grace.
This is shown also from the dignity of charity. For every creature is vanity. If therefore charity is a creature, it will be vanity. But vanity does not join to truth, nor confirm in truth. Therefore charity would not join us to God; which is false.
Further, nothing finite is of infinite power, since power flows from essence. But every creature is finite. Therefore the power of no creature is infinite. But the power of charity is infinite, because it moves across an infinite distance: for it joins the creature to the Creator, and makes the sinner just. Therefore it seems that it is not a creature.
Likewise, no creature is worthier than the soul of Christ. But charity is worthier than the soul of Christ, since it is by charity itself that the soul of Christ is good. Therefore charity is not a creature.
Further, to a greater good a greater love is owed. But God is an infinite good, and has done infinite things for us. Therefore we owe him infinite love. But the love by which we love God is charity. Therefore charity is something infinite. Therefore it is not a creature.
Further, everything created is in some predicament. But whatever is contained in the ten genera is some nature. If therefore charity is something created, it will be a certain nature. But a nature coming to a nature makes nothing but a nature. Therefore the soul having charity, if charity is something created, will have nothing but the being of nature. But through charity it can merit. Therefore some nature will be able of itself to reach meritorious acts; which is the Pelagian heresy. It seems therefore that charity is not something created.
On the contrary: everything that is received in something is received in it after the manner of the receiver. But uncreated love, which is the Holy Spirit, is participated in the creature. Therefore it is participated according to the manner of that creature. But its manner is finite. Therefore it is necessary that some finite love be received in the creature. But everything finite is created. Therefore in the soul having the Holy Spirit there is some created charity.
Likewise, every assimilation comes about through some form. But through charity we are made conformed to God himself; and when it is lost, the soul is said to be deformed. Therefore it seems that charity is a certain created form remaining in the soul.
Further, it is established that God is in the saints in some manner in which he is not in other creatures. But this difference cannot be placed on the side of God himself, who stands in the same way towards all things. Therefore it seems that it is on the side of the creature — namely, that the creature itself has something which others do not have. Either then it has the divine being itself, and thus all the just would be taken up by the Holy Spirit into unity of person, as human nature was taken up by Christ into unity of the person of the Son of God: which cannot be. Or it is necessary that that creature, in which God is said to be in a special manner, have in itself some effect of God which others do not have. But this effect cannot be an act only; because in that case, in the just who are asleep, he would be there in no other manner than in other creatures. Therefore it is necessary that it be some habit. It is necessary therefore that some created habit of charity be in the soul, according to which the Holy Spirit is said to indwell it.
I answer that the whole goodness of the soul itself is from charity: whence it has as much of charity as it is good, and if it does not have charity, it is nothing, as is said in 1 Corinthians 13. But it is established that through charity the soul does not have less of goodness in the being of grace than it has through an acquired virtue in political being. Now political virtue does two things: it makes the one having it good, and it renders his work good. Much more strongly, therefore, does charity do this. But neither of these can be brought about unless charity is a created habit. For it is established that all being comes from some inhering form, as being white comes from whiteness, and substantial being from substantial form. Just as therefore it cannot be understood that a wall is white without inhering whiteness, so it cannot be understood that the soul is good in gratuitous being without charity and grace informing it. Likewise also, since an act is proportioned to the operative power as an effect to its proper cause, it is impossible to understand that an act perfect in goodness should come from a power not perfected by a habit; just as heating cannot come from fire except through the medium of heat. And therefore, since the act of charity has a certain perfection from the fact that it is meritorious in every way, it is necessary to posit that charity is a created habit in the soul — which indeed is efficiently from the whole Trinity, but flows exemplarily from Love, who is the Holy Spirit. And therefore it is frequently found that the Holy Spirit is the love by which we love God and neighbour, just as it is also said by Dionysius that the divine being is the being of all things, namely inasmuch as all being is exemplarily drawn from him. The Master, however, holds that charity is not any created habit in the soul, but that it is only an act which comes from free choice moved by the Holy Spirit, whom he calls charity. For the explaining of which, certain men have said that, just as light can be considered in two ways — either as it is in itself, and so it is called light, or as it is at the boundary of a bounded transparent body, and so light is called colour (since the hypostasis of colour is light, and colour is nothing other than embodied light) — so they say that the Holy Spirit, as he is considered in himself, is called the Holy Spirit and God; but as he is considered as existing in the soul, which he moves to the act of charity, he is called charity. For they say that, just as the Son alone united human nature to himself, although the working of the whole Trinity is there, so the Holy Spirit alone unites the will to himself, although the working of the whole Trinity is there. But this cannot stand; because the union of human nature in Christ is terminated at the one being of a divine person, and therefore the numerically same act belongs to the divine person and to the assumed human nature. But the will of some saint is not taken up into the unity of the supposit of the Holy Spirit. Whence, since a working has its unity and diversity from the supposit, it cannot be that one working of the will and of the Holy Spirit be understood, except in the manner in which God works in any thing whatever. But that manner does not suffice for the perfection of the working; because a working follows the conditions of the proximate cause in necessity and contingency and perfection and the like, and not those of the first cause. Whence there is no understanding that there is a perfect working of the will through which it is united to the Holy Spirit, unless there is there a habit perfecting the operative power: nor can there be a likeness of the act of the will to the Holy Spirit, unless there is a likeness of the Holy Spirit in the soul through some form, which is the principle of the act by which it is conformed to the Holy Spirit; because the act does not suffice for this, as has been said.
To the first, therefore, it must be said that in the making-pleasing of the soul there is a twofold working of the Holy Spirit to consider. One, which is terminated at being according to first act, which is being pleasing in having the habit of charity. The other, according to which he works the second act, which is the working that moves the will to the work of love: and in both ways a medium must fall in, not on account of any need or defect in the Spirit who works, but on account of the necessity of the soul which receives — though differently. For as to the first effect, which is the being of grace, charity is a medium after the manner of a formal cause: because no being can be received in a creature except through some form. But as to the second effect, which is the working, charity is a medium in the character of an efficient cause, according as we lead back the power which is the principle of working into the agent cause: because neither is it possible that any perfect working should come out from a creature, unless the principle of that working be a perfection of the working power, as we say that the habit eliciting the act is its principle.
To the second it must be said that the soul is compared to the body not only as an acting cause, according as it is the mover of the body, but also as a form; whence it formally makes the body live by itself, according as to live is said to be the being of living things. But God is not the form of the soul itself or of the will, by which it could formally live; but he is called the life of the soul as the principle exemplarily flowing the life of grace into it. Likewise it must be said of light, that light can be considered in two ways. Either as it is in the luminous body itself, and thus it stands to the illumination of the air as an efficient principle, and does not illuminate except through the form of light flowed into the transparent body illuminated; or as it is in the illuminated transparent body, and thus it is its form, by which it is formally luminous. But God is called the illuminating light after the manner of the light which is in the shining body of itself, and not after the manner in which the illuminated is formally illuminated by the form of light received in it. But charity or grace received in the soul is likened to that received light.
To the third it must be said that creation and re-creation are altogether alike. For just as God by creation conferred on things the being of nature, and that being is formally from the form received in the created thing itself, which is as it were the term of the working of the agent; and again that form is the principle of the natural workings which God works in things: so also in re-creation God confers on the soul the being of grace, and the formal principle of that being is a created habit, by which also the meritorious working which God works in us is perfected; and thus this created habit stands partly to the working of the Holy Spirit as a term, and partly as a medium.
To the fourth it must be said that charity, inasmuch as it is from nothing, has it that it is vanity; but inasmuch as it proceeds from God as a likeness of him, it does not have the character of vanity, but rather of joining to God himself.
To the fifth it must be said that something is said to make in two ways: either after the manner of an efficient cause, as a painter makes a wall white; or after the manner of a form, as whiteness makes it white. To make a just man out of a sinner, then, or one joined to God, belongs to God himself as efficient, and to charity itself as form. Whence it cannot be concluded that charity is of infinite power, but only that it is the effect of an infinite power.
To the sixth it must be said that the nobility of things can be regarded in two ways: either simply, or in a certain respect. Now that seems simply worthier which is nobler according to its being, and in this way the soul of Christ and the soul of any just man is nobler than created charity, which has the being of an accident. Something also seems worthier in a certain respect, which is worthier according to something; and in this way created charity is nobler than the soul of Christ. For in any genus the act is nobler than the potency, as regards that genus. Whence, just as the whiteness of Christ's body, as regards that being which is being white, is nobler than the body of Christ is; so also his created knowledge is nobler than his soul as regards this, that it is being knowing, which is being in a certain respect. And likewise charity as regards such being: because in that being it stands to the soul of Christ as act to potency.
To the seventh it must be said that, according to the Philosopher, in certain friendships it never happens that an equivalent is returned: but for the fairness of the friendship what is possible to be returned suffices; just as a son can never return to his bodily father anything equivalent to what he received from him, namely being and teaching and nourishment. Much less can we return love equivalent to the divine benefits and to his goodness. Whence it does not follow that the love by which we love God is infinite as regards the substance of the act; but it has infinity from this, that the object of the love is set before all others: but it suffices that we love with a love commensurate to ourselves.
To the last it must be said that nature is said in many ways, according to Boethius. For in one way nature is said of everything that is, whether substance or accident; and in this way grace is a certain nature. In another way nature is said to be the principle of motion and rest in that in which it is, whence that is called natural which either is caused by natural principles or can be so caused; and in this way charity is not a nature, because it cannot be caused through the natural principles of a creature. And it is according to this manner that Pelagius says that a man can reach meritorious acts by natural things alone.
Fresh draft (Claude), approved by Wilson Pruitt · cc-by · published at bonaventure.wrootpress.com. This page quotes it; that is its home.
Thomas Aquinas, Scriptum super Sententiis I d.17 q.1 a.1 (Parma vol. VI, 1856, archive.org sanctithomaeaqu06thom; text located via Corpus Thomisticum) · pd
Thomas's own commentary on this distinction, written at Paris within two years of Bonaventure's. Eight objections all argue the Master's side, three sed contra answer them, and the corpus names him: Magister tamen vult quod caritas non sit aliquis habitus creatus in anima. The corpus then reports an anonymous defence of the Master (quidam dixerunt) built on the analogy of light and colour and on the Incarnation, and rejects it — the same defence, with the same Christological parallel, that Bonaventure's scholion reports and rejects. Latin verified segment by segment against the page's own anchor index, and ⭐ confirmed against Parma vol. VI (1856) 2026-09-06 — see raw/thomas/verification/PARMA-LEONINE-VERIFICATION.md.