Summa Th. I-II EN Qu.63


We must now consider the cause of virtues; and under this head there are four points of inquiry:

(1) Whether virtue is in us by nature?

(2) Whether any virtue is caused in us by habituation?

(3) Whether any moral virtues are in us by infusion?

(4) Whether virtue acquired by habituation, is of the same species as infused virtue?

Whether virtue is in us by nature?

Objection: 1. It would seem that virtue is in us by nature. For Damascene says (De Fide Orth. iii, 14): "Virtues are natural to us and are equally in all of us." And Antony says in his sermon to the monks: "If the will contradicts nature it is perverse, if it follow nature it is virtuous." Moreover, a gloss on Mt 4,23, "Jesus went about," etc., says: "He taught them natural virtues, i.e. chastity, justice, humility, which man possesses naturally."
2. Further, the virtuous good consists in accord with reason, as was clearly shown above (Question [55], Article [4], ad 2). But that which accords with reason is natural to man; since reason is part of man's nature. Therefore virtue is in man by nature.
3. Further, that which is in us from birth is said to be natural to us. Now virtues are in some from birth: for it is written (Jb 31,18): "From my infancy mercy grew up with me; and it came out with me from my mother's womb." Therefore virtue is in man by nature.

On the contrary Whatever is in man by nature is common to all men, and is not taken away by sin, since even in the demons natural gifts remain, as Dionysius states (Div. Nom. iv). But virtue is not in all men; and is cast out by sin. Therefore it is not in man by nature.
I answer that With regard to corporeal forms, it has been maintained by some that they are wholly from within, by those, for instance, who upheld the theory of "latent forms" [*Anaxagoras; Cf. FP, Question [45], Article [8]; Question [65], Article [4]]. Others held that forms are entirely from without, those, for instance, who thought that corporeal forms originated from some separate cause. Others, however, esteemed that they are partly from within, in so far as they pre-exist potentially in matter; and partly from without, in so far as they are brought into act by the agent.In like manner with regard to sciences and virtues, some held that they are wholly from within, so that all virtues and sciences would pre-exist in the soul naturally, but that the hindrances to science and virtue, which are due to the soul being weighed down by the body, are removed by study and practice, even as iron is made bright by being polished. This was the opinion of the Platonists. Others said that they are wholly from without, being due to the inflow of the active intellect, as Avicenna maintained. Others said that sciences and virtues are within us by nature, so far as we are adapted to them, but not in their perfection: this is the teaching of the Philosopher (Ethic. ii, 1), and is nearer the truth.To make this clear, it must be observed that there are two ways in which something is said to be natural to a man; one is according to his specific nature, the other according to his individual nature. And, since each thing derives its species from its form, and its individuation from matter, and, again, since man's form is his rational soul, while his matter is his body, whatever belongs to him in respect of his rational soul, is natural to him in respect of his specific nature; while whatever belongs to him in respect of the particular temperament of his body, is natural to him in respect of his individual nature. For whatever is natural to man in respect of his body, considered as part of his species, is to be referred, in a way, to the soul, in so far as this particular body is adapted to this particular soul.In both these ways virtue is natural to man inchoatively. This is so in respect of the specific nature, in so far as in man's reason are to be found instilled by nature certain naturally known principles of both knowledge and action, which are the nurseries of intellectual and moral virtues, and in so far as there is in the will a natural appetite for good in accordance with reason. Again, this is so in respect of the individual nature, in so far as by reason of a disposition in the body, some are disposed either well or ill to certain virtues: because, to wit, certain sensitive powers are acts of certain parts of the body, according to the disposition of which these powers are helped or hindered in the exercise of their acts, and, in consequence, the rational powers also, which the aforesaid sensitive powers assist. In this way one man has a natural aptitude for science, another for fortitude, another for temperance: and in these ways, both intellectual and moral virtues are in us by way of a natural aptitude, inchoatively, but not perfectly, since nature is determined to one, while the perfection of these virtues does not depend on one particular mode of action, but on various modes, in respect of the various matters, which constitute the sphere of virtue's action, and according to various circumstances.It is therefore evident that all virtues are in us by nature, according to aptitude and inchoation, but not according to perfection, except the theological virtues, which are entirely from without.

Reply to Objection: 1. This suffices for the Replies to the Objections. For the first two argue about the nurseries of virtue which are in us by nature, inasmuch as we are rational beings. The third objection must be taken in the sense that, owing to the natural disposition which the body has from birth, one has an aptitude for pity, another for living temperately, another for some other virtue.

Whether any virtue is caused in us by habituation?

Objection: 1. It would seem that virtues can not be caused in us by habituation. Because a gloss of Augustine [*Cf. Lib. Sentent. Prosperi cvi.] commenting on Rm 14,23, "All that is not of faith is sin," says: "The whole life of an unbeliever is a sin: and there is no good without the Sovereign Good. Where knowledge of the truth is lacking, virtue is a mockery even in the best behaved people." Now faith cannot be acquired by means of works, but is caused in us by God, according to Ep 2,8: "By grace you are saved through faith." Therefore no acquired virtue can be in us by habituation.
2. Further, sin and virtue are contraries, so that they are incompatible. Now man cannot avoid sin except by the grace of God, according to Sg 8,21: "I knew that I could not otherwise be continent, except God gave it." Therefore neither can any virtues be caused in us by habituation, but only by the gift of God.
3. Further, actions which lead toward virtue, lack the perfection of virtue. But an effect cannot be more perfect than its cause. Therefore a virtue cannot be caused by actions that precede it.

On the contrary Dionysius says (Div. Nom. iv) that good is more efficacious than evil. But vicious habits are caused by evil acts. Much more, therefore, can virtuous habits be caused by good acts.
I answer that We have spoken above (Question [51], Articles [2],3) in a general way about the production of habits from acts; and speaking now in a special way of this matter in relation to virtue, we must take note that, as stated above (Question [55], Articles [3],4), man's virtue perfects him in relation to good. Now since the notion of good consists in "mode, species, and order," as Augustine states (De Nat. Boni. iii) or in "number, weight, and measure," as expressed in Sg 11,21, man's good must needs be appraised with respect to some rule. Now this rule is twofold, as stated above (Question [19], Articles [3],4), viz. human reason and Divine Law. And since Divine Law is the higher rule, it extends to more things, so that whatever is ruled by human reason, is ruled by the Divine Law too; but the converse does not hold.It follows that human virtue directed to the good which is defined according to the rule of human reason can be caused by human acts: inasmuch as such acts proceed from reason, by whose power and rule the aforesaid good is established. On the other hand, virtue which directs man to good as defined by the Divine Law, and not by human reason, cannot be caused by human acts, the principle of which is reason, but is produced in us by the Divine operation alone. Hence Augustine in giving the definition of the latter virtue inserts the words, "which God works in us without us" (Super Ps 118, Serm. xxvi). It is also of these virtues that the First Objection holds good.

Reply to Objection: 1. Mortal sin is incompatible with divinely infused virtue, especially if this be considered in its perfect state. But actual sin, even mortal, is compatible with humanly acquired virtue; because the use of a habit in us is subject to our will, as stated above (Question [49], Article [3]): and one sinful act does not destroy a habit of acquired virtue, since it is not an act but a habit, that is directly contrary to a habit. Wherefore, though man cannot avoid mortal sin without grace, so as never to sin mortally, yet he is not hindered from acquiring a habit of virtue, whereby he may abstain from evil in the majority of cases, and chiefly in matters most opposed to reason. There are also certain mortal sins which man can nowise avoid without grace, those, namely, which are directly opposed to the theological virtues, which are in us through the gift of grace. This, however, will be more fully explained later (Question [109], Article [4]).
2. As stated above (Article [1]; Question [51], Article [1]), certain seeds or principles of acquired virtue pre-exist in us by nature. These principles are more excellent than the virtues acquired through them: thus the understanding of speculative principles is more excellent than the science of conclusions, and the natural rectitude of the reason is more excellent than the rectification of the appetite which results through the appetite partaking of reason, which rectification belongs to moral virtue. Accordingly human acts, in so far as they proceed from higher principles, can cause acquired human virtues.

Whether any moral virtues are in us by infusion?

Objection: 1. It would seem that no virtues besides the theological virtues are infused in us by God. Because God does not do by Himself, save perhaps sometimes miraculously, those things that can be done by second causes; for, as Dionysius says (Coel. Hier. iv), "it is God's rule to bring about extremes through the mean." Now intellectual and moral virtues can be caused in us by our acts, as stated above (Article [2]). Therefore it is not reasonable that they should be caused in us by infusion.
2. Further, much less superfluity is found in God's works than in the works of nature. Now the theological virtues suffice to direct us to supernatural good. Therefore there are no other supernatural virtues needing to be caused in us by God.
3. Further, nature does not employ two means where one suffices: much less does God. But God sowed the seeds of virtue in our souls, according to a gloss on He 1 [*Cf. Jerome on Ga 1,15-16]. Therefore it is unfitting for Him to cause in us other virtues by means of infusion.

On the contrary It is written (Sg 8,7): "She teacheth temperance and prudence and justice and fortitude."
I answer that Effects must needs be proportionate to their causes and principles. Now all virtues, intellectual and moral, that are acquired by our actions, arise from certain natural principles pre-existing in us, as above stated (Article [1]; Question [51], Article [1]): instead of which natural principles, God bestows on us the theological virtues, whereby we are directed to a supernatural end, as stated (Question [62], Article [1]). Wherefore we need to receive from God other habits corresponding, in due proportion, to the theological virtues, which habits are to the theological virtues, what the moral and intellectual virtues are to the natural principles of virtue.

Reply to Objection: 1. Some moral and intellectual virtues can indeed be caused in us by our actions: but such are not proportionate to the theological virtues. Therefore it was necessary for us to receive, from God immediately, others that are proportionate to these virtues.
2. The theological virtues direct us sufficiently to our supernatural end, inchoatively: i.e. to God Himself immediately. But the soul needs further to be perfected by infused virtues in regard to other things, yet in relation to God.
3. The power of those naturally instilled principles does not extend beyond the capacity of nature. Consequently man needs in addition to be perfected by other principles in relation to his supernatural end.

Whether virtue by habituation belongs to the same species as infused virtue?

Objection: 1. It would seem that infused virtue does not differ in species from acquired virtue. Because acquired and infused virtues, according to what has been said (Article [3]), do not differ seemingly, save in relation to the last end. Now human habits and acts are specified, not by their last, but by their proximate end. Therefore the infused moral or intellectual virtue does not differ from the acquired virtue.
2. Further, habits are known by their acts. But the act of infused and acquired temperance is the same, viz. to moderate desires of touch. Therefore they do not differ in species.
3. Further, acquired and infused virtue differ as that which is wrought by God immediately, from that which is wrought by a creature. But the man whom God made, is of the same species as a man begotten naturally; and the eye which He gave to the man born blind, as one produced by the power of generation. Therefore it seems that acquired and infused virtue belong to the same species.

On the contrary Any change introduced into the difference expressed in a definition involves a difference of species. But the definition of infused virtue contains the words, "which God works in us without us," as stated above (Question [55], Article [4]). Therefore acquired virtue, to which these words cannot apply, is not of the same species as infused virtue.
I answer that There is a twofold specific difference among habits. The first, as stated above (Question [54], Article [2]; Question [56], Article [2]; Question [60], Article [1]), is taken from the specific and formal aspects of their objects. Now the object of every virtue is a good considered as in that virtue's proper matter: thus the object of temperance is a good in respect of the pleasures connected with the concupiscence of touch. The formal aspect of this object is from reason which fixes the mean in these concupiscences: while the material element is something on the part of the concupiscences. Now it is evident that the mean that is appointed in such like concupiscences according to the rule of human reason, is seen under a different aspect from the mean which is fixed according to Divine rule. For instance, in the consumption of food, the mean fixed by human reason, is that food should not harm the health of the body, nor hinder the use of reason: whereas, according to the Divine rule, it behooves man to "chastise his body, and bring it into subjection" (1Co 9,27), by abstinence in food, drink and the like. It is therefore evident that infused and acquired temperance differ in species; and the same applies to the other virtues.The other specific differences among habits is taken from the things to which they are directed: for a man's health and a horse's are not of the same species, on account of the difference between the natures to which their respective healths are directed. In the same sense, the Philosopher says (Polit. iii, 3) that citizens have diverse virtues according as they are well directed to diverse forms of government. In the same way, too, those infused moral virtues, whereby men behave well in respect of their being "fellow-citizens with the saints, and of the household [Douay: 'domestics'] of God" (Ep 2,19), differ from the acquired virtues, whereby man behaves well in respect of human affairs.

Reply to Objection: 1. Infused and acquired virtue differ not only in relation to the ultimate end, but also in relation to their proper objects, as stated.
2. Both acquired and infused temperance moderate desires for pleasures of touch, but for different reasons, as stated: wherefore their respective acts are not identical.
3. God gave the man born blind an eye for the same act as the act for which other eyes are formed naturally: consequently it was of the same species. It would be the same if God wished to give a man miraculously virtues, such as those that are acquired by acts. But the case is not so in the question before us, as stated.


We must now consider the properties of virtues: and (1) the mean of virtue, (2) the connection between virtues, (3) equality of virtues, (4) the duration of virtues. Under the first head there are four points of inquiry:

(1) Whether moral virtue observes the mean?

(2) Whether the mean of moral virtue is the real mean or the rational mean?

(3) Whether the intellectual virtues observe the mean?

(4) Whether the theological virtues do?

Whether moral virtues observe the mean?

Objection: 1. It would seem that moral virtue does not observe the mean. For the nature of a mean is incompatible with that which is extreme. Now the nature of virtue is to be something extreme; for it is stated in De Coelo i that "virtue is the limit of power." Therefore moral virtue does not observe the mean.
2. Further, the maximum is not a mean. Now some moral virtues tend to a maximum: for instance, magnanimity to very great honors, and magnificence to very large expenditure, as stated in Ethic. iv, 2,3. Therefore not every moral virtue observes the mean.
3. Further, if it is essential to a moral virtue to observe the mean, it follows that a moral virtue is not perfected, but the contrary corrupted, through tending to something extreme. Now some moral virtues are perfected by tending to something extreme; thus virginity, which abstains from all sexual pleasure, observes the extreme, and is the most perfect chastity: and to give all to the poor is the most perfect mercy or liberality. Therefore it seems that it is not essential to moral virtue that it should observe the mean.

On the contrary The Philosopher says (Ethic. ii, 6) that "moral virtue is a habit of choosing the mean."
I answer that As already explained (Question [55], Article [3]), the nature of virtue is that it should direct man to good. Now moral virtue is properly a perfection of the appetitive part of the soul in regard to some determinate matter: and the measure or rule of the appetitive movement in respect of appetible objects is the reason. But the good of that which is measured or ruled consists in its conformity with its rule: thus the good things made by art is that they follow the rule of art. Consequently, in things of this sort, evil consists in discordance from their rule or measure. Now this may happen either by their exceeding the measure or by their falling short of it; as is clearly the case in all things ruled or measured. Hence it is evident that the good of moral virtue consists in conformity with the rule of reason. Now it is clear that between excess and deficiency the mean is equality or conformity. Therefore it is evident that moral virtue observes the mean.

Reply to Objection: 1. Moral virtue derives goodness from the rule of reason, while its matter consists in passions or operations. If therefore we compare moral virtue to reason, then, if we look at that which is has of reason, it holds the position of one extreme, viz. conformity; while excess and defect take the position of the other extreme, viz. deformity. But if we consider moral virtue in respect of its matter, then it holds the position of mean, in so far as it makes the passion conform to the rule of reason. Hence the Philosopher says (Ethic. ii, 6) that "virtue, as to its essence, is a mean state," in so far as the rule of virtue is imposed on its proper matter: "but it is an extreme in reference to the 'best' and the 'excellent,'" viz. as to its conformity with reason.
2. In actions and passions the mean and the extremes depend on various circumstances: hence nothing hinders something from being extreme in a particular virtue as to one circumstance, while the same thing is a mean in respect of other circumstances, through being in conformity with reason. This is the case with magnanimity and magnificence. For if we look at the absolute quantity of the respective objects of these virtues, we shall call it an extreme and a maximum: but if we consider the quantity in relation to other circumstances, then it has the character of a mean: since these virtues tend to this maximum in accordance with the rule of reason, i.e. "where" it is right, "when" it is right, and for an "end" that is right. There will be excess, if one tends to this maximum "when" it is not right, or "where" it is not right, or for an undue "end"; and there will be deficiency if one fails to tend thereto "where" one ought, and "when" one aught. This agrees with the saying of the Philosopher (Ethic. iv, 3) that the "magnanimous man observes the extreme in quantity, but the mean in the right mode of his action."
3. The same is to be said of virginity and poverty as of magnanimity. For virginity abstains from all sexual matters, and poverty from all wealth, for a right end, and in a right manner, i.e. according to God's word, and for the sake of eternal life. But if this be done in an undue manner, i.e. out of unlawful superstition, or again for vainglory, it will be in excess. And if it be not done when it ought to be done, or as it ought to be done, it is a vice by deficiency: for instance, in those who break their vows of virginity or poverty.

Whether the mean of moral virtue is the real mean, or the rational mean?

Objection: 1. It would seem that the mean of moral virtue is not the rational mean, but the real mean. For the good of moral virtue consists in its observing the mean. Now, good, as stated in Metaph. ii, text. 8, is in things themselves. Therefore the mean of moral virtue is a real mean.
2. Further, the reason is a power of apprehension. But moral virtue does not observe a mean between apprehensions, but rather a mean between operations or passions. Therefore the mean of moral virtue is not the rational, but the real mean.
3. Further, a mean that is observed according to arithmetical or geometrical proportion is a real mean. Now such is the mean of justice, as stated in Ethic. v, 3. Therefore the mean of moral virtue is not the rational, but the real mean.

On the contrary The Philosopher says (Ethic. ii, 6) that "moral virtue observes the mean fixed, in our regard, by reason."
I answer that The rational mean can be understood in two ways. First, according as the mean is observed in the act itself of reason, as though the very act of reason were made to observe the mean: in this sense, since moral virtue perfects not the act of reason, but the act of the appetitive power, the mean of moral virtue is not the rational mean. Secondly, the mean of reason may be considered as that which the reason puts into some particular matter. In this sense every mean of moral virtue is a rational mean, since, as above stated (Article [1]), moral virtue is said to observe the mean, through conformity with right reason.But it happens sometimes that the rational mean is also the real mean: in which case the mean of moral virtue is the real mean, for instance, in justice. On the other hand, sometimes the rational mean is not the real mean, but is considered in relation to us: and such is the mean in all the other moral virtues. The reason for this is that justice is about operations, which deal with external things, wherein the right has to be established simply and absolutely, as stated above (Question [60], Article [2]): wherefore the rational mean in justice is the same as the real mean, in so far, to wit as justice gives to each one his due, neither more nor less. But the other moral virtues deal with interior passions wherein the right cannot be established in the same way, since men are variously situated in relation to their passions; hence the rectitude of reason has to be established in the passions, with due regard to us, who are moved in respect of the passions.

Reply to Objection: 1. This suffices for the Replies to the Objections. For the first two arguments take the rational mean as being in the very act of reason, while the third argues from the mean of justice.

Whether the intellectual virtues observe the mean?

Objection: 1. It would seem that the intellectual virtues do not observe the mean. Because moral virtue observes the mean by conforming to the rule of reason. But the intellectual virtues are in reason itself, so that they seem to have no higher rule. Therefore the intellectual virtues do not observe the mean.
2. Further, the mean of moral virtue is fixed by an intellectual virtue: for it is stated in Ethic. ii, 6, that "virtue observes the mean appointed by reason, as a prudent man would appoint it." If therefore intellectual virtue also observe the mean, this mean will have to be appointed for them by another virtue, so that there would be an indefinite series of virtues.
3. Further, a mean is, properly speaking, between contraries, as the Philosopher explains (Metaph. x, text. 22,23). But there seems to be no contrariety in the intellect; since contraries themselves, as they are in the intellect, are not in opposition to one another, but are understood together, as white and black, healthy and sick. Therefore there is no mean in the intellectual virtues.

On the contrary Art is an intellectual virtue; and yet there is a mean in art (Ethic. ii, 6). Therefore also intellectual virtue observes the mean.
I answer that The good of anything consists in its observing the mean, by conforming with a rule or measure in respect of which it may happen to be excessive or deficient, as stated above (Article [1]). Now intellectual virtue, like moral virtue, is directed to the good, as stated above (Question [56], Article [3]). Hence the good of an intellectual virtue consists in observing the mean, in so far as it is subject to a measure. Now the good of intellectual virtue is the true; in the case of contemplative virtue, it is the true taken absolutely (Ethic. vi, 2); in the case of practical virtue, it is the true in conformity with a right appetite.Now truth apprehended by our intellect, if we consider it absolutely, is measured by things; since things are the measure of our intellect, as stated in Metaph. x, text. 5; because there is truth in what we think or say, according as the thing is so or not. Accordingly the good of speculative intellectual virtue consists in a certain mean, by way of conformity with things themselves, in so far as the intellect expresses them as being what they are, or as not being what they are not: and it is in this that the nature of truth consists. There will be excess if something false is affirmed, as though something were, which in reality it is not: and there will be deficiency if something is falsely denied, and declared not to be, whereas in reality it is.The truth of practical intellectual virtue, if we consider it in relation to things, is by way of that which is measured; so that both in practical and in speculative intellectual virtues, the mean consists in conformity with things. But if we consider it in relation to the appetite, it has the character of a rule and measure. Consequently the rectitude of reason is the mean of moral virtue, and also the mean of prudence---of prudence as ruling and measuring, of moral virtue, as ruled and measured by that mean. In like manner the difference between excess and deficiency is to be applied in both cases.

Reply to Objection: 1. Intellectual virtues also have their measure, as stated, and they observe the mean according as they conform to that measure.
2. There is no need for an indefinite series of virtues: because the measure and rule of intellectual virtue is not another kind of virtue, but things themselves.
3. The things themselves that are contrary have no contrariety in the mind, because one is the reason for knowing the other: nevertheless there is in the intellect contrariety of affirmation and negation, which are contraries, as stated at the end of Peri Hermenias. For though "to be" and "not to be" are not in contrary, but in contradictory opposition to one another, so long as we consider their signification in things themselves, for on the one hand we have "being" and on the other we have simply "non-being"; yet if we refer them to the act of the mind, there is something positive in both cases. Hence "to be" and "not to be" are contradictory: but the opinion stating that "good is good" is contrary to the opinion stating that "good is not good": and between two such contraries intellectual virtue observes the mean.

Whether the theological virtues observe the mean?

Objection: 1. It would seem that theological virtue observes the mean. For the good of other virtues consists in their observing the mean. Now the theological virtues surpass the others in goodness. Therefore much more does theological virtue observe the mean.
2. Further, the mean of moral virtue depends on the appetite being ruled by reason; while the mean of intellectual virtue consists in the intellect being measured by things. Now theological virtue perfects both intellect and appetite, as stated above (Question [62], Article [3]). Therefore theological virtue also observes the mean.
3. Further, hope, which is a theological virtue, is a mean between despair and presumption. Likewise faith holds a middle course between contrary heresies, as Boethius states (De Duab. Natur. vii): thus, by confessing one Person and two natures in Christ, we observe the mean between the heresy of Nestorius, who maintained the existence of two persons and two natures, and the heresy of Eutyches, who held to one person and one nature. Therefore theological virtue observes the mean.

On the contrary Wherever virtue observes the mean it is possible to sin by excess as well as by deficiency. But there is no sinning by excess against God, Who is the object of theological virtue: for it is written (Si 43,33): "Blessing the Lord, exalt Him as much as you can: for He is above all praise." Therefore theological virtue does not observe the mean.
I answer that As stated above (Article [1]), the mean of virtue depends on conformity with virtue's rule or measure, in so far as one may exceed or fall short of that rule. Now the measure of theological virtue may be twofold. One is taken from the very nature of virtue, and thus the measure and rule of theological virtue is God Himself: because our faith is ruled according to Divine truth; charity, according to His goodness; hope, according to the immensity of His omnipotence and loving kindness. This measure surpasses all human power: so that never can we love God as much as He ought to be loved, nor believe and hope in Him as much as we should. Much less therefore can there be excess in such things. Accordingly the good of such virtues does not consist in a mean, but increases the more we approach to the summit.The other rule or measure of theological virtue is by comparison with us: for although we cannot be borne towards God as much as we ought, yet we should approach to Him by believing, hoping and loving, according to the measure of our condition. Consequently it is possible to find a mean and extremes in theological virtue, accidentally and in reference to us.

Reply to Objection: 1. The good of intellectual and moral virtues consists in a mean of reason by conformity with a measure that may be exceeded: whereas this is not so in the case of theological virtue, considered in itself, as stated above.
2. Moral and intellectual virtues perfect our intellect and appetite in relation to a created measure and rule; whereas the theological virtues perfect them in relation to an uncreated rule and measure. Wherefore the comparison fails.
3. Hope observes the mean between presumption and despair, in relation to us, in so far, to wit, as a man is said to be presumptuous, through hoping to receive from God a good in excess of his condition; or to despair through failing to hope for that which according to his condition he might hope for. But there can be no excess of hope in comparison with God, Whose goodness is infinite. In like manner faith holds a middle course between contrary heresies, not by comparison with its object, which is God, in Whom we cannot believe too much; but in so far as human opinion itself takes a middle position between contrary opinions, as was explained above.

Summa Th. I-II EN Qu.63