Summa Th. II-II EN Qu.164 a.2

Whether the particular punishments of our first parents are suitably appointed in Scripture?

Objection: 1. It would seem that the particular punishments of our first parents are unsuitably appointed in Scripture. For that which would have occurred even without sin should not be described as a punishment for sin. Now seemingly there would have been "pain in child-bearing," even had there been no sin: for the disposition of the female sex is such that offspring cannot be born without pain to the bearer. Likewise the "subjection of woman to man" results from the perfection of the male, and the imperfection of the female sex. Again it belongs to the nature of the earth "to bring forth thorns and thistles," and this would have occurred even had there been no sin. Therefore these are unsuitable punishments of the first sin.
2. Further, that which pertains to a person's dignity does not, seemingly, pertain to his punishment. But the "multiplying of conceptions" pertains to a woman's dignity. Therefore it should not be described as the woman's punishment.
3. Further, the punishment of our first parents' sin is transmitted to all, as we have stated with regard to death (Article [1]). But all "women's conceptions" are not "multiplied," nor does "every man eat bread in the sweat of his face." Therefore these are not suitable punishments of the first sin.
4. Further, the place of paradise was made for man. Now nothing in the order of things should be without purpose. Therefore it would seem that the exclusion of man from paradise was not a suitable punishment of man.
5. Further, this place of the earthly paradise is said to be naturally inaccessible. Therefore it was useless to put other obstacles in the way lest man should return thither, to wit the cherubim, and the "flaming sword turning every way."
6. Further, immediately after his sin man was subject to the necessity of dying, so that he could not be restored to immortality by the beneficial tree of life. Therefore it was useless to forbid him to eat of the tree of life, as instanced by the words of Gn 3,22: "See, lest perhaps he . . . take . . . of the tree of life . . . and live for ever."
7. Further, to mock the unhappy seems inconsistent with mercy and clemency, which are most of all ascribed to God in Scripture, according to Ps 144,9, "His tender mercies are over all His works." Therefore God is unbecomingly described as mocking our first parents, already reduced through sin to unhappy straits, in the words of Gn 3,22, "Behold Adam is become as one of Us, knowing good and evil."
8. Further, clothes are necessary to man, like food, according to 1Tm 6,8, "Having food, and wherewith to be covered, with these we are content." Therefore just as food was appointed to our first parents before their sin, so also should clothing have been ascribed to them. Therefore after their sin it was unsuitable to say that God made for them garments of skin.
9. Further, the punishment inflicted for a sin should outweigh in evil the gain realized through the sin: else the punishment would not deter one from sinning. Now through sin our first parents gained in this, that their eyes were opened, according to Gn 3,7. But this outweighs in good all the penal evils which are stated to have resulted from sin. Therefore the punishments resulting from our first parents' sin are unsuitably described.

On the contrary These punishments were appointed by God, Who does all things, "in number, weight, and measure [*Vulg.: 'Thou hast ordered all things in measure, and number, and weight.']" (Sg 11,21).
I answer that As stated in the foregoing Article, on account of their sin, our first parents were deprived of the Divine favor, whereby the integrity of human nature was maintained in them, and by the withdrawal of this favor human nature incurred penal defects. Hence they were punished in two ways. In the first place by being deprived of that which was befitting the state of integrity, namely the place of the earthly paradise: and this is indicated (Gn 3,23) where it is stated that "God sent him out of the paradise of pleasure." And since he was unable, of himself, to return to that state of original innocence, it was fitting that obstacles should be placed against his recovering those things that were befitting his original state, namely food (lest he should take of the tree of life) and place; for "God placed before . . . paradise . . . Cherubim, and a flaming sword." Secondly, they were punished by having appointed to them things befitting a nature bereft of the aforesaid favor: and this as regards both the body and the soul. With regard to the body, to which pertains the distinction of sex, one punishment was appointed to the woman and another to the man. To the woman punishment was appointed in respect of two things on account of which she is united to the man; and these are the begetting of children, and community of works pertaining to family life. As regards the begetting of children, she was punished in two ways: first in the weariness to which she is subject while carrying the child after conception, and this is indicated in the words (Gn 3,16), "I will multiply thy sorrows, and thy conceptions"; secondly, in the pain which she suffers in giving birth, and this is indicated by the words (Gn 3,16), "In sorrow shalt thou bring forth." As regards family life she was punished by being subjected to her husband's authority, and this is conveyed in the words (Gn 3,16), "Thou shalt be under thy husband's power."Now, just as it belongs to the woman to be subject to her husband in matters relating to the family life, so it belongs to the husband to provide the necessaries of that life. In this respect he was punished in three ways. First, by the barrenness of the earth, in the words (Gn 3,17), "Cursed is the earth in thy work." Secondly, by the cares of his toil, without which he does not win the fruits of the earth; hence the words (Gn 3,17), "With labor and toil shalt thou eat thereof all the days of thy life." Thirdly, by the obstacles encountered by the tillers of the soil, wherefore it is written (Gn 3,18), "Thorns and thistles shall it bring forth to thee."Likewise a triple punishment is ascribed to them on the part of the soul. First, by reason of the confusion they experienced at the rebellion of the flesh against the spirit; hence it is written (Gn 3,7): "The eyes of them both were opened; and . . . they perceived themselves to be naked." Secondly, by the reproach for their sin, indicated by the words (Gn 3,22), "Behold Adam is become as one of Us." Thirdly, by the reminder of their coming death, when it was said to him (Gn 3,19): "Dust thou art and into dust thou shalt return." To this also pertains that God made them garments of skin, as a sign of their mortality.

Reply to Objection: 1. In the state of innocence child-bearing would have been painless: for Augustine says (De Civ. Dei xiv, 26): "Just as, in giving birth, the mother would then be relieved not by groans of pain, but by the instigations of maturity, so in bearing and conceiving the union of both sexes would be one not of lustful desire but of deliberate action" [*Cf. I 98,2].The subjection of the woman to her husband is to be understood as inflicted in punishment of the woman, not as to his headship (since even before sin the man was the "head" and governor "of the woman"), but as to her having now to obey her husband's will even against her own.If man had not sinned, the earth would have brought forth thorns and thistles to be the food of animals, but not to punish man, because their growth would bring no labor or punishment for the tiller of the soil, as Augustine says (Gn ad lit. iii, 18). Alcuin [*Interrog. et Resp. in Gen. lxxix], however, holds that, before sin, the earth brought forth no thorns and thistles, whatever: but the former opinion is the better.
2. The multiplying of her conceptions was appointed as a punishment to the woman, not on account of the begetting of children, for this would have been the same even before sin, but on account of the numerous sufferings to which the woman is subject, through carrying her offspring after conception. Hence it is expressly stated: "I will multiply thy sorrows, and thy conceptions."
3. These punishments affect all somewhat. For any woman who conceives must needs suffer sorrows and bring forth her child with pain: except the Blessed Virgin, who "conceived without corruption, and bore without pain" [*St. Bernard, Serm. in Dom. inf. oct. Assum. B. V. M.], because her conceiving was not according to the law of nature, transmitted from our first parents. And if a woman neither conceives nor bears, she suffers from the defect of barrenness, which outweighs the aforesaid punishments. Likewise whoever tills the soil must needs eat his bread in the sweat of his brow: while those who do not themselves work on the land, are busied with other labors, for "man is born to labor" (Jb 5,7): and thus they eat the bread for which others have labored in the sweat of their brow.
4. Although the place of the earthly paradise avails not man for his use, it avails him for a lesson; because he knows himself deprived of that place on account of sin, and because by the things that have a bodily existence in that paradise, he is instructed in things pertaining to the heavenly paradise, the way to which is prepared for man by Christ.
5. Apart from the mysteries of the spiritual interpretation, this place would seem to be inaccessible, chiefly on account of the extreme heat in the middle zone by reason of the nighness of the sun. This is denoted by the "flaming sword," which is described as "turning every way," as being appropriate to the circular movement that causes this heat. And since the movements of corporal creatures are set in order through the ministry of the angels, according to Augustine (De Trin. iii, 4), it was fitting that, besides the sword turning every way, there should be cherubim "to keep the way of the tree of life." Hence Augustine says (Gn ad lit. xi, 40): "It is to be believed that even in the visible paradise this was done by heavenly powers indeed, so that there was a fiery guard set there by the ministry of angels."
6. After sin, if man had ate of the tree of life, he would not thereby have recovered immortality, but by means of that beneficial food he might have prolonged his life. Hence in the words "And live for ever," "for ever" signifies "for a long time." For it was not expedient for man to remain longer in the unhappiness of this life.
7. According to Augustine (Gn ad lit. xi, 39), "these words of God are not so much a mockery of our first parents as a deterrent to others, for whose benefit these things are written, lest they be proud likewise, because Adam not only failed to become that which he coveted to be, but did not keep that to which he was made."
8. Clothing is necessary to man in his present state of unhappiness for two reasons. First, to supply a deficiency in respect of external harm caused by, for instance, extreme heat or cold. Secondly, to hide his ignominy and to cover the shame of those members wherein the rebellion of the flesh against the spirit is most manifest. Now these two motives do not apply to the primitive state. because then man's body could not be hurt by any outward thing, as stated in the I 97,2, nor was there in man's body anything shameful that would bring confusion on him. Hence it is written (Gn 2,23): "And they were both naked, to wit Adam and his wife, and were not ashamed." The same cannot be said of food, which is necessary to entertain the natural heat, and to sustain the body.
9. As Augustine says (Gn ad lit. xi, 31), "We must not imagine that our first parents were created with their eyes closed, especially since it is stated that the woman saw that the tree was fair, and good to eat. Accordingly the eyes of both were opened so that they saw and thought on things which had not occurred to their minds before, this was a mutual concupiscence such as they had not hitherto."


We must now consider our first parents' temptation, concerning which there are two points of inquiry:

(1) Whether it was fitting for man to be tempted by the devil?

(2) Of the manner and order of that temptation.

Whether it was fitting for man to be tempted by the devil?

Objection: 1. It would seem that it was not fitting for man to be tempted by the devil. For the same final punishment is appointed to the angels' sin and to man's, according to Mt 25,41, "Go [Vulg.: 'Depart from Me'] you cursed into everlasting fire, which was prepared for the devil and his angels." Now the angels' first sin did not follow a temptation from without. Therefore neither should man's first sin have resulted from an outward temptation.
2. Further, God, Who foreknows the future, knew that through the demon's temptation man would fall into sin, and thus He knew full well that it was not expedient for man to be tempted. Therefore it would seem unfitting for God to allow him to be tempted.
3. Further, it seems to savor of punishment that anyone should have an assailant, just as on the other hand the cessation of an assault is akin to a reward. Now punishment should not precede fault. Therefore it was unfitting for man to be tempted before he sinned.

On the contrary It is written (Si 34,11): "He that hath not been tempted [Douay: 'tried'], what manner of things doth he know?"
I answer that God's wisdom "orders all things sweetly" (Sg 8,1), inasmuch as His providence appoints to each one that which is befitting it according to its nature. For as Dionysius says (Div. Nom. iv), "it belongs to providence not to destroy, but to maintain, nature." Now it is a condition attaching to human nature that one creature can be helped or impeded by another. Wherefore it was fitting that God should both allow man in the state of innocence to be tempted by evil angels, and should cause him to be helped by good angels. And by a special favor of grace, it was granted him that no creature outside himself could harm him against his own will, whereby he was able even to resist the temptation of the demon.

Reply to Objection: 1. Above the human nature there is another that admits of the possibility of the evil of fault: but there is not above the angelic nature. Now only one that is already become evil through sin can tempt by leading another into evil. Hence it was fitting that by an evil angel man should be tempted to sin, even as according to the order of nature he is moved forward to perfection by means of a good angel. An angel could be perfected in good by something above him, namely by God, but he could not thus be led into sin, because according to Jc 1,13, "God is not a tempter of evils."
2. Just as God knew that man, through being tempted, would fall into sin, so too He knew that man was able, by his free will, to resist the tempter. Now the condition attaching to man's nature required that he should be left to his own will, according to Si 15,14, "God left" man "in the hand of his own counsel." Hence Augustine says (Gn ad lit. xi, 4): "It seems to me that man would have had no prospect of any special praise, if he were able to lead a good life simply because there was none to persuade him to lead an evil life; since both by nature he had the power, and in his power he had the will, not to consent to the persuader."
3. An assault is penal if it be difficult to resist it: but, in the state of innocence, man was able, without any difficulty, to resist temptation. Consequently the tempter's assault was not a punishment to man.

Whether the manner and order of the first temptation was fitting?

Objection: 1. It would seem that the manner and order of the first temptation was not fitting. For just as in the order of nature the angel was above man, so was the man above the woman. Now sin came upon man through an angel: therefore in like manner it should have come upon the woman through the man; in other words the woman should have been tempted by the man, and not the other way about.
2. Further, the temptation of our first parents was by suggestion. Now the devil is able to make suggestions to man without making use of an outward sensible creature. Since then our first parents were endowed with a spiritual mind, and adhered less to sensible than to intelligible things, it would have been more fitting for man to be tempted with a merely spiritual, instead of an outward, temptation.
3. Further, one cannot fittingly suggest an evil except through some apparent good. But many other animals have a greater appearance of good than the serpent has. Therefore man was unfittingly tempted by the devil through a serpent.
4. Further, the serpent is an irrational animal. Now wisdom, speech, and punishment are not befitting an irrational animal. Therefore the serpent is unfittingly described (Gn 3,1) as "more subtle than any of the beasts of the earth," or as "the most prudent of all beasts" according to another version [*The Septuagint]: and likewise is unfittingly stated to have spoken to the woman, and to have been punished by God.

On the contrary That which is first in any genus should be proportionate to all that follow it in that genus. Now in every kind of sin we find the same order as in the first temptation. For, according to Augustine (De Trin. xii, 12), it begins with the concupiscence of sin in the sensuality, signified by the serpent; extends to the lower reason, by pleasure, signified by the woman; and reaches to the higher reason by consent in the sin, signified by the man. Therefore the order of the first temptation was fitting.
I answer that Man is composed of a twofold nature, intellective and sensitive. Hence the devil, in tempting man, made use of a twofold incentive to sin: one on the part of the intellect, by promising the Divine likeness through the acquisition of knowledge which man naturally desires to have; the other on the part of sense. This he did by having recourse to those sensible things, which are most akin to man, partly by tempting the man through the woman who was akin to him in the same species; partly by tempting the woman through the serpent, who was akin to them in the same genus; partly by suggesting to them to eat of the forbidden fruit, which was akin to them in the proximate genus.

Reply to Objection: 1. In the act of tempting the devil was by way of principal agent; whereas the woman was employed as an instrument of temptation in bringing about the downfall of the man, both because the woman was weaker than the man, and consequently more liable to be deceived, and because, on account of her union with man, the devil was able to deceive the man especially through her. Now there is no parity between principal agent and instrument, because the principal agent must exceed in power, which is not requisite in the instrumental agent.
2. A suggestion whereby the devil suggests something to man spiritually, shows the devil to have more power against man than outward suggestion has, since by an inward suggestion, at least, man's imagination is changed by the devil [*Cf. I 91,3]; whereas by an outward suggestion, a change is wrought merely on an outward creature. Now the devil had a minimum of power against man before sin, wherefore he was unable to tempt him by inward suggestion, but only by outward suggestion.
3. According to Augustine (Gn ad lit. xi, 3), "we are not to suppose that the devil chose the serpent as his means of temptation; but as he was possessed of the lust of deceit, he could only do so by the animal he was allowed to use for that purpose."
4. According to Augustine (Gn ad lit. xi, 29), "the serpent is described as most prudent or subtle, on account of the cunning of the devil, who wrought his wiles in it: thus, we speak of a prudent or cunning tongue, because it is the instrument of a prudent or cunning man in advising something prudently or cunningly. Nor indeed (Gn ad lit. xi, 28) did the serpent understand the sounds which were conveyed through it to the woman; nor again are we to believe that its soul was changed into a rational nature, since not even men, who are rational by nature, know what they say when a demon speaks in them. Accordingly (Gn ad lit. xi, 29) the serpent spoke to man, even as the ass on which Balaam sat spoke to him, except that the former was the work of a devil, whereas the latter was the work of an angel. Hence (Gn ad lit. xi, 36) the serpent was not asked why it had done this, because it had not done this in its own nature, but the devil in it, who was already condemned to everlasting fire on account of his sin: and the words addressed to the serpent were directed to him who wrought through the serpent."Moreover, as again Augustine says (Super Gen. contra Manich. ii, 17,18), "his, that is, the devil's, punishment mentioned here is that for which we must be on our guard against him, not that which is reserved till the last judgment. For when it was said to him: 'Thou art cursed among all cattle and beasts of the earth,' the cattle are set above him, not in power, but in the preservation of their nature, since the cattle lost no heavenly bliss, seeing that they never had it, but they continue to live in the nature which they received." It is also said to him: "'Upon thy breast and belly shalt thou creep,'" according to another version [*The Septuagint] "Here the breast signifies pride, because it is there that the impulse of the soul dominates, while the belly denotes carnal desire, because this part of the body is softest to the touch: and on these he creeps to those whom he wishes to deceive." The words, "'Earth shalt thou eat all the days of thy life' may be understood in two ways. Either 'Those shall belong to thee, whom thou shalt deceive by earthly lust,' namely sinners who are signified under the name of earth, or a third kind of temptation, namely curiosity, is signified by these words: for to eat earth is to look into things deep and dark." The putting of enmities between him and the woman "means that we cannot be tempted by the devil, except through that part of the soul which bears or reflects the likeness of a woman. The seed of the devil is the temptation to evil, the seed of the woman is the fruit of good works, whereby the temptation to evil is resisted. Wherefore the serpent lies in wait for the woman's heel, that if at any time she fall away towards what is unlawful, pleasure may seize hold of her: and she watches his head that she may shut him out at the very outset of the evil temptation."


We must next consider studiousness and its opposite, curiosity. Concerning studiousness there are two points of inquiry:

(1) What is the matter of studiousness?

(2) Whether it is a part of temperance?

Whether the proper matter of studiousness is knowledge?

Objection: 1. It would seem that knowledge is not the proper matter of studiousness. For a person is said to be studious because he applies study to certain things. Now a man ought to apply study to every matter, in order to do aright what has to be done. Therefore seemingly knowledge is not the special matter of studiousness.
2. Further, studiousness is opposed to curiosity. Now curiosity, which is derived from "cura" [care], may also refer to elegance of apparel and other such things, which regard the body; wherefore the Apostle says (Rm 13,14): "Make not provision [curam] for the flesh in its concupiscences."
3. Further it is written (Jr 6,13): "From the least of them even to the greatest, all study [Douay: 'are given to'] covetousness." Now covetousness is not properly about knowledge, but rather about the possession of wealth, as stated above (Question [118], Article [2]). Therefore studiousness, which is derived from "study," is not properly about knowledge.

On the contrary It is written (Pr 27,11): "Study wisdom, my son, and make my heart joyful, that thou mayest give an answer to him that reproacheth." Now study, which is commended as a virtue, is the same as that to which the Law urges. Therefore studiousness is properly about "knowledge."
I answer that Properly speaking, study denotes keen application of the mind to something. Now the mind is not applied to a thing except by knowing that thing. Wherefore the mind's application to knowledge precedes its application to those things to which man is directed by his knowledge. Hence study regards knowledge in the first place, and as a result it regards any other things the working of which requires to be directed by knowledge. Now the virtues lay claim to that matter about which they are first and foremost; thus fortitude is concerned about dangers of death, and temperance about pleasures of touch. Therefore studiousness is properly ascribed to knowledge.

Reply to Objection: 1. Nothing can be done aright as regards other matters, except in so far as is previously directed by the knowing reason. Hence studiousness, to whatever matter it be applied, has a prior regard for knowledge.
2. Man's mind is drawn, on account of his affections, towards the things for which he has an affection, according to Mt 6,21, "Where thy treasure is, there is thy heart also." And since man has special affection for those things which foster the flesh, it follows that man's thoughts are concerned about things that foster his flesh, so that man seeks to know how he may best sustain his body. Accordingly curiosity is accounted to be about things pertaining to the body by reason of things pertaining to knowledge.
3. Covetousness craves the acquisition of gain, and for this it is very necessary to be skilled in earthly things. Accordingly studiousness is ascribed to things pertaining to covetousness.

Whether studiousness is a part of temperance?

Objection: 1. It would seem that studiousness is not a part of temperance. For a man is said to be studious by reason of his studiousness. Now all virtuous persons without exception are called studious according to the Philosopher, who frequently employs the term "studious" ((spoudaios)) in this sense (Ethic. ix, 4,8,9). [*In the same sense Aristotle says in Ethic. iii, 2, that "every vicious person is ignorant of what he ought to do."] Therefore studiousness is a general virtue, and not a part of temperance.
2. Further, studiousness, as stated (Article [1]), pertains to knowledge. But knowledge has no connection with the moral virtues which are in the appetitive part of the soul, and pertains rather to the intellectual virtues which are in the cognitive part: wherefore solicitude is an act of prudence as stated above (Question [47], Article [9]). Therefore studiousness is not a part of temperance.
3. Further, a virtue that is ascribed as part of a principal virtue resembles the latter as to mode. Now studiousness does not resemble temperance as to mode, because temperance takes its name from being a kind of restraint, wherefore it is more opposed to the vice that is in excess: whereas studiousness is denominated from being the application of the mind to something, so that it would seem to be opposed to the vice that is in default, namely, neglect of study, rather than to the vice which is in excess, namely curiosity. wherefore, on account of its resemblance to the latter, Isidore says (Etym. x) that "a studious man is one who is curious to study." Therefore studiousness is not a part of temperance.

On the contrary Augustine says (De Morib. Eccl. 21): "We are forbidden to be curious: and this is a great gift that temperance bestows." Now curiosity is prevented by moderate studiousness. Therefore studiousness is a part of temperance.
I answer that As stated above (Question [141], Articles [3],4,5), it belongs to temperance to moderate the movement of the appetite, lest it tend excessively to that which is desired naturally. Now just as in respect of his corporeal nature man naturally desires the pleasures of food and sex, so, in respect of his soul, he naturally desires to know something; thus the Philosopher observes at the beginning of his Metaphysics i, 1: "All men have a natural desire for knowledge."The moderation of this desire pertains to the virtue of studiousness; wherefore it follows that studiousness is a potential part of temperance, as a subordinate virtue annexed to a principal virtue. Moreover, it is comprised under modesty for the reason given above (Question [160], Article [2]).

Reply to Objection: 1. Prudence is the complement of all the moral virtues, as stated in Ethic. vi, 13. Consequently, in so far as the knowledge of prudence pertains to all the virtues, the term "studiousness," which properly regards knowledge, is applied to all the virtues.
2. The act of a cognitive power is commanded by the appetitive power, which moves all the powers, as stated above (I-II 9,1). Wherefore knowledge regards a twofold good. One is connected with the act of knowledge itself; and this good pertains to the intellectual virtues, and consists in man having a true estimate about each thing. The other good pertains to the act of the appetitive power, and consists in man's appetite being directed aright in applying the cognitive power in this or that way to this or that thing. And this belongs to the virtue of seriousness. Wherefore it is reckoned among the moral virtues.
3. As the Philosopher says (Ethic. ii, 93) in order to be virtuous we must avoid those things to which we are most naturally inclined. Hence it is that, since nature inclines us. chiefly to fear dangers of death, and to seek pleasures of the flesh, fortitude is chiefly commended for a certain steadfast perseverance against such dangers, and temperance for a certain restraint from pleasures of the flesh. But as regards knowledge, man has contrary inclinations. For on the part of the soul, he is inclined to desire knowledge of things; and so it behooves him to exercise a praiseworthy restraint on this desire, lest he seek knowledge immoderately: whereas on the part of his bodily nature, man is inclined to avoid the trouble of seeking knowledge. Accordingly, as regards the first inclination studiousness is a kind of restraint, and it is in this sense that it is reckoned a part of temperance. But as to the second inclination, this virtue derives its praise from a certain keenness of interest in seeking knowledge of things; and from this it takes its name. The former is more essential to this virtue than the latter: since the desire to know directly regards knowledge, to which studiousness is directed, whereas the trouble of learning is an obstacle to knowledge, wherefore it is regarded by this virtue indirectly, as by that which removes an obstacle.


We must next consider curiosity, under which head there are two points of inquiry:

(1) Whether the vice of curiosity can regard intellective knowledge?

(2) Whether it is about sensitive knowledge?

Whether curiosity can be about intellective knowledge?

Objection: 1. It would seem that curiosity cannot be about intellective knowledge. Because, according to the Philosopher (Ethic. ii, 6), there can be no mean and extremes in things which are essentially good. Now intellective knowledge is essentially good: because man's perfection would seem to consist in his intellect being reduced from potentiality to act, and this is done by the knowledge of truth. For Dionysius says (Div. Nom. iv) that "the good of the human soul is to be in accordance with reason," whose perfection consists in knowing the truth. Therefore the vice of curiosity cannot be about intellective knowledge.
2. Further, that which makes man like to God, and which he receives from God, cannot be an evil. Now all abundance of knowledge is from God, according to Si 1,1, "All wisdom is from the Lord God," and Sg 7,17, "He hath given me the true knowledge of things that are, to know the disposition of the whole world, and the virtues of the elements," etc. Again, by knowing the truth man is likened to God, since "all things are naked and open to His eyes" (He 4,13), and "the Lord is a God of all knowledge" (1R 2,3). Therefore however abundant knowledge of truth may be, it is not evil but good. Now the desire of good is not sinful. Therefore the vice of curiosity cannot be about the intellective knowledge of truth.
3. Further, if the vice of curiosity can be about any kind of intellective knowledge, it would be chiefly about the philosophical sciences. But, seemingly, there is no sin in being intent on them: for Jerome says (Super Da 1,8): "Those who refused to partake of the king's meat and wine, lest they should be defiled, if they had considered the wisdom and teaching of the Babylonians to be sinful, would never have consented to learn that which was unlawful": and Augustine says (De Doctr. Christ. ii, 40) that "if the philosophers made any true statements, we must claim them for our own use, as from unjust possessors." Therefore curiosity about intellective knowledge cannot be sinful.

On the contrary Jerome [*Comment. in Ep. ad Ephes. iv, 17] says: "Is it not evident that a man who day and night wrestles with the dialectic art, the student of natural science whose gaze pierces the heavens, walks in vanity of understanding and darkness of mind?" Now vanity of understanding and darkness of mind are sinful. Therefore curiosity about intellective sciences may be sinful.
I answer that As stated above (Question [166], Article [2], ad 2) studiousness is directly, not about knowledge itself, but about the desire and study in the pursuit of knowledge. Now we must judge differently of the knowledge itself of truth, and of the desire and study in the pursuit of the knowledge of truth. For the knowledge of truth, strictly speaking, is good, but it may be evil accidentally, by reason of some result, either because one takes pride in knowing the truth, according to 1Co 8,1, "Knowledge puffeth up," or because one uses the knowledge of truth in order to sin.On the other hand, the desire or study in pursuing the knowledge of truth may be right or wrong. First, when one tends by his study to the knowledge of truth as having evil accidentally annexed to it, for instance those who study to know the truth that they may take pride in their knowledge. Hence Augustine says (De Morib. Eccl. 21): "Some there are who forsaking virtue, and ignorant of what God is, and of the majesty of that nature which ever remains the same, imagine they are doing something great, if with surpassing curiosity and keenness they explore the whole mass of this body which we call the world. So great a pride is thus begotten, that one would think they dwelt in the very heavens about which they argue." In like manner, those who study to learn something in order to sin are engaged in a sinful study, according to the saying of Jr 9,5, "They have taught their tongue to speak lies, they have labored to commit iniquity."Secondly, there may be sin by reason of the appetite or study directed to the learning of truth being itself inordinate; and this in four ways. First, when a man is withdrawn by a less profitable study from a study that is an obligation incumbent on him; hence Jerome says [*Epist. xxi ad Damas]: "We see priests forsaking the gospels and the prophets, reading stage-plays, and singing the love songs of pastoral idylls." Secondly, when a man studies to learn of one, by whom it is unlawful to be taught, as in the case of those who seek to know the future through the demons. This is superstitious curiosity, of which Augustine says (De Vera Relig. 4): "Maybe, the philosophers were debarred from the faith by their sinful curiosity in seeking knowledge from the demons."Thirdly, when a man desires to know the truth about creatures, without referring his knowledge to its due end, namely, the knowledge of God. Hence Augustine says (De Vera Relig. 29) that "in studying creatures, we must not be moved by empty and perishable curiosity; but we should ever mount towards immortal and abiding things."
Fourthly, when a man studies to know the truth above the capacity of his own intelligence, since by so doing men easily fall into error: wherefore it is written (Si 3,22): "Seek not the things that are too high for thee, and search not into things above thy ability . . . and in many of His works be not curious," and further on (Si 3,26), "For . . . the suspicion of them hath deceived many, and hath detained their minds in vanity."

Reply to Objection: 1. Man's good consists in the knowledge of truth; yet man's sovereign good consists, not in the knowledge of any truth, but in the perfect knowledge of the sovereign truth, as the Philosopher states (Ethic. x, 7,8). Hence there may be sin in the knowledge of certain truths, in so far as the desire of such knowledge is not directed in due manner to the knowledge of the sovereign truth, wherein supreme happiness consists.
2. Although this argument shows that the knowledge of truth is good in itself, this does not prevent a man from misusing the knowledge of truth for an evil purpose, or from desiring the knowledge of truth inordinately, since even the desire for good should be regulated in due manner.
3. The study of philosophy is in itself lawful and commendable, on account of the truth which the philosophers acquired through God revealing it to them, as stated in Rm 1,19. Since, however, certain philosophers misuse the truth in order to assail the faith, the Apostle says (Col 2,8): "Beware lest any man cheat you by philosophy and vain deceit, according to the tradition of men . . . and not according to Christ": and Dionysius says (Ep. vii ad Polycarp.) of certain philosophers that "they make an unholy use of divine things against that which is divine, and by divine wisdom strive to destroy the worship of God."

Summa Th. II-II EN Qu.164 a.2