Thomas Aquinas, Summa Theologiae

Objection 1: It would seem that the precepts of the decalogue are unsuitably set forth. Because sin, as stated by Ambrose (De Paradiso viii), is "a transgression of the Divine law and a disobedience to the commandments of heaven." But sins are distinguished according as man sins against God, or his neighbor, or himself. Since, then, the decalogue does not include any precepts directing man in his relations to himself, but only such as direct him in his relations to God and himself, it seems that the precepts of the decalogue are insufficiently enumerated.

Objection 2: Further, just as the Sabbath-day observance pertained to the worship of God, so also did the observance of other solemnities, and the offering of sacrifices. But the decalogue contains a precept about the Sabbath-day observance. Therefore it should contain others also, pertaining to the other solemnities, and to the sacrificial rite.

Objection 3: Further, as sins against God include the sin of perjury, so also do they include blasphemy, or other ways of lying against the teaching of God. But there is a precept forbidding perjury, "Thou shalt not take the name of the Lord thy God in vain." Therefore there should be also a precept of the decalogue forbidding blasphemy and false doctrine.

Objection 4: Further, just as man has a natural affection for his parents, so has he also for his children. Moreover the commandment of charity extends to all our neighbors. Now the precepts of the decalogue are ordained unto charity, according to 1 Tim. 1:5: "The end of the commandment is charity." Therefore as there is a precept referring to parents, so should there have been some precepts referring to children and other neighbors.

Objection 5: Further, in every kind of sin, it is possible to sin in thought or in deed. But in some kinds of sin, namely in theft and adultery, the prohibition of sins of deed, when it is said, "Thou shalt not commit adultery, Thou shalt not steal," is distinct from the prohibition of the sin of thought, when it is said, "Thou shalt not covet thy neighbor's goods," and, "Thou shalt not covet thy neighbor's wife." Therefore the same should have been done in regard to the sins of homicide and false witness.

Objection 6: Further, just as sin happens through disorder of the concupiscible faculty, so does it arise through disorder of the irascible part. But some precepts forbid inordinate concupiscence, when it is said, "Thou shalt not covet." Therefore the decalogue should have included some precepts forbidding the disorders of the irascible faculty. Therefore it seems that the ten precepts of the decalogue are unfittingly enumerated.

On the contrary, It is written (Dt. 4:13): "He shewed you His covenant, which He commanded you to do, and the ten words that He wrote in two tablets of stone."

I answer that, As stated above (Article 2), just as the precepts of human law direct man in his relations to the human community, so the precepts of the Divine law direct man in his relations to a community or commonwealth of men under God. Now in order that any man may dwell aright in a community, two things are required: the first is that he behave well to the head of the community; the other is that he behave well to those who are his fellows and partners in the community. It is therefore necessary that the Divine law should contain in the first place precepts ordering man in his relations to God; and in the second place, other precepts ordering man in his relations to other men who are his neighbors and live with him under God.

Now man owes three things to the head of the community: first, fidelity; secondly, reverence; thirdly, service. Fidelity to his master consists in his not giving sovereign honor to another: and this is the sense of the first commandment, in the words "Thou shalt not have strange gods." Reverence to his master requires that he should do nothing injurious to him: and this is conveyed by the second commandment, "Thou shalt not take the name of the Lord thy God in vain." Service is due to the master in return for the benefits which his subjects receive from him: and to this belongs the third commandment of the sanctification of the Sabbath in memory of the creation of all things.

To his neighbors a man behaves himself well both in particular and in general. In particular, as to those to whom he is indebted, by paying his debts: and in this sense is to be taken the commandment about honoring one's parents. In general, as to all men, by doing harm to none, either by deed, or by word, or by thought. By deed, harm is done to one's neighbor---sometimes in his person, i.e. as to his personal existence; and this is forbidden by the words, "Thou shalt not kill": sometimes in a person united to him, as to the propagation of offspring; and this is prohibited by the words, "Thou shalt not commit adultery": sometimes in his possessions, which are directed to both the aforesaid; and with this regard to this it is said, "Thou shalt not steal." Harm done by word is forbidden when it is said, "Thou shalt not bear false witness against thy neighbor": harm done by thought is forbidden in the words, "Thou shalt not covet."

The three precepts that direct man in his behavior towards God may also be differentiated in this same way. For the first refers to deeds; wherefore it is said, "Thou shalt not make . . . a graven thing": the second, to words; wherefore it is said, "Thou shalt not take the name of the Lord thy God in vain": the third, to thoughts; because the sanctification of the Sabbath, as the subject of a moral precept, requires repose of the heart in God. Or, according to Augustine (In Ps. 32: Conc. 1), by the first commandment we reverence the unity of the First Principle; by the second, the Divine truth; by the third, His goodness whereby we are sanctified, and wherein we rest as in our last end.

Reply to Objection 1: This objection may be answered in two ways. First, because the precepts of the decalogue can be reduced to the precepts of charity. Now there was need for man to receive a precept about loving God and his neighbor, because in this respect the natural law had become obscured on account of sin: but not about the duty of loving oneself, because in this respect the natural law retained its vigor: or again, because love of oneself is contained in the love of God and of one's neighbor: since true self-love consists in directing oneself to God. And for this reason the decalogue includes those precepts only which refer to our neighbor and to God.

Secondly, it may be answered that the precepts of the decalogue are those which the people received from God immediately; wherefore it is written (Dt. 10:4): "He wrote in the tables, according as He had written before, the ten words, which the Lord spoke to you." Hence the precepts of the decalogue need to be such as the people can understand at once. Now a precept implies the notion of duty. But it is easy for a man, especially for a believer, to understand that, of necessity, he owes certain duties to God and to his neighbor. But that, in matters which regard himself and not another, man has, of necessity, certain duties to himself, is not so evident: for, at the first glance, it seems that everyone is free in matters that concern himself. And therefore the precepts which prohibit disorders of a man with regard to himself, reach the people through the instruction of men who are versed through the instruction of men who are versed in such matters; and, consequently, they are not contained in the decalogue.

Reply to Objection 2: All the solemnities of the Old Law were instituted in celebration of some Divine favor, either in memory of past favors, or in sign of some favor to come: in like manner all the sacrifices were offered up with the same purpose. Now of all the Divine favors to be commemorated the chief was that of the Creation, which was called to mind by the sanctification of the Sabbath; wherefore the reason for this precept is given in Ex. 20:11: "In six days the Lord made heaven and earth," etc. And of all future blessings, the chief and final was the repose of the mind in God, either, in the present life, by grace, or, in the future life, by glory; which repose was also foreshadowed in the Sabbath-day observance: wherefore it is written (Is. 58:13): "If thou turn away thy foot from the Sabbath, from doing thy own will in My holy day, and call the Sabbath delightful, and the holy of the Lord glorious." Because these favors first and chiefly are borne in mind by men, especially by the faithful. But other solemnities were celebrated on account of certain particular favors temporal and transitory, such as the celebration of the Passover in memory of the past favor of the delivery from Egypt, and as a sign of the future Passion of Christ, which though temporal and transitory, brought us to the repose of the spiritual Sabbath. Consequently, the Sabbath alone, and none of the other solemnities and sacrifices, is mentioned in the precepts of the decalogue.

Reply to Objection 3: As the Apostle says (Heb. 6:16), "men swear by one greater than themselves; and an oath for confirmation is the end of all their controversy." Hence, since oaths are common to all, inordinate swearing is the matter of a special prohibition by a precept of the decalogue. According to one interpretation, however, the words, "Thou shalt not take the name of the Lord thy God in vain," are a prohibition of false doctrine, for one gloss expounds them thus: "Thou shalt not say that Christ is a creature."

Reply to Objection 4: That a man should not do harm to anyone is an immediate dictate of his natural reason: and therefore the precepts that forbid the doing of harm are binding on all men. But it is not an immediate dictate of natural reason that a man should do one thing in return for another, unless he happen to be indebted to someone. Now a son's debt to his father is so evident that one cannot get away from it by denying it: since the father is the principle of generation and being, and also of upbringing and teaching. Wherefore the decalogue does not prescribe deeds of kindness or service to be done to anyone except to one's parents. On the other hand parents do not seem to be indebted to their children for any favors received, but rather the reverse is the case. Again, a child is a part of his father; and "parents love their children as being a part of themselves," as the Philosopher states (Ethic. viii, 12). Hence, just as the decalogue contains no ordinance as to man's behavior towards himself, so, for the same reason, it includes no precept about loving one's children.

Reply to Objection 5: The pleasure of adultery and the usefulness of wealth, in so far as they have the character of pleasurable or useful good, are of themselves, objects of appetite: and for this reason they needed to be forbidden not only in the deed but also in the desire. But murder and falsehood are, of themselves, objects of repulsion (since it is natural for man to love his neighbor and the truth): and are desired only for the sake of something else. Consequently with regard to sins of murder and false witness, it was necessary to proscribe, not sins of thought, but only sins of deed.

Reply to Objection 6: As stated above (Question 25, Article 1), all the passions of the irascible faculty arise from the passions of the concupiscible part. Hence, as the precepts of the decalogue are, as it were, the first elements of the Law, there was no need for mention of the irascible passions, but only of the concupiscible passions.

Articulus 5

Argumentum 1

Ad quintum sic proceditur. Videtur quod inconvenienter praecepta Decalogi enumerentur.

Peccatum enim, ut Ambrosius dicit, est transgressio legis divinae, et caelestium inobedientia mandatorum.

Sed peccata distinguuntur per hoc quod homo peccat vel in deum, vel in proximum, vel in seipsum. Cum igitur in praeceptis Decalogi non ponantur aliqua praecepta ordinantia hominem ad seipsum, sed solum ordinantia ipsum ad deum et proximum; videtur quod insufficiens sit enumeratio praeceptorum Decalogi.

Argumentum 2

Praeterea, sicut ad cultum dei pertinebat observatio sabbati, ita etiam observatio aliarum solemnitatum, et immolatio sacrificiorum. Sed inter praecepta Decalogi est unum pertinens ad observantiam sabbati. Ergo etiam debent esse aliqua pertinentia ad alias solemnitates, et ad ritum sacrificiorum.

Argumentum 3

Praeterea, sicut contra deum peccare contingit periurando, ita etiam blasphemando, vel alias contra doctrinam divinam mentiendo. Sed ponitur unum praeceptum prohibens periurium, cum dicitur, non assumes nomen dei tui in vanum.

Ergo peccatum blasphemiae, et falsae doctrinae, debent aliquo praecepto Decalogi prohiberi.

Argumentum 4

Praeterea, sicut homo naturalem dilectionem habet ad parentes, ita etiam ad filios. Mandatum etiam caritatis ad omnes proximos extenditur. Sed praecepta Decalogi ordinantur ad caritatem; secundum illud I Tim. I, finis praecepti caritas est.

Ergo sicut ponitur quoddam praeceptum pertinens ad parentes, ita etiam debuerunt poni aliqua praecepta pertinentia ad filios et ad alios proximos.

Argumentum 5

Praeterea, in quolibet genere peccati contingit peccare corde et opere. Sed in quibusdam generibus peccatorum, scilicet in furto et adulterio, seorsum prohibetur peccatum operis, cum dicitur, non moechaberis, non furtum facies; et seorsum peccatum cordis, cum dicitur, non concupisces rem proximi tui, et, non concupisces uxorem proximi tui. Ergo etiam idem debuit poni in peccato homicidii et falsi testimonii.

Argumentum 6

Praeterea, sicut contingit peccatum provenire ex inordinatione concupiscibilis, ita etiam ex inordinatione irascibilis.

Sed quibusdam praeceptis prohibetur inordinata concupiscentia, cum dicitur, non concupisces. Ergo etiam aliqua praecepta in Decalogo debuerunt poni per quae prohiberetur inordinatio irascibilis. Non ergo videtur quod convenienter decem praecepta Decalogi enumerentur.

Sed Contra

Sed contra est quod dicitur Deut. IV, ostendit vobis pactum suum, quod praecepit ut faceretis; et decem verba quae scripsit in duabus tabulis lapideis.

Corpus

Respondeo dicendum quod, sicut supra dictum est, sicut praecepta legis humanae ordinant hominem ad communitatem humanam, ita praecepta legis divinae ordinant hominem ad quandam communitatem seu rempublicam hominum sub deo.

Ad hoc autem quod aliquis in aliqua communitate bene commoretur, duo requiruntur, quorum primum est ut bene se habeat ad eum qui praeest communitati; aliud autem est ut homo bene se habeat ad alios communitatis consocios et comparticipes.

Oportet igitur quod in lege divina primo ferantur quaedam praecepta ordinantia hominem ad deum; et deinde alia praecepta ordinantia hominem ad alios proximos simul conviventes sub deo.

Principi autem communitatis tria debet homo, primo quidem, fidelitatem; secundo, reverentiam; tertio, famulatum.

Fidelitas quidem ad dominum in hoc consistit, ut honorem principatus ad alium non deferat. Et quantum ad hoc accipitur primum praeceptum, cum dicitur, non habebis deos alienos.

Reverentia autem ad dominum requiritur ut nihil iniuriosum in eum committatur. Et quantum ad hoc accipitur secundum praeceptum, quod est, non assumes nomen domini dei tui in vanum.

Famulatus autem debetur domino in recompensationem beneficiorum quae ab ipso percipiunt subditi. Et ad hoc pertinet tertium praeceptum, de sanctificatione sabbati in memoriam creationis rerum.

Ad proximos autem aliquis bene se habet et specialiter, et generaliter. Specialiter quidem, quantum ad illos quorum est debitor, ut eis debitum reddat. Et quantum ad hoc accipitur praeceptum de honoratione parentum. Generaliter autem, quantum ad omnes, ut nulli nocumentum inferatur, neque opere neque ore neque corde. Opere quidem infertur nocumentum proximo, quandoque quidem in personam propriam, quantum ad consistentiam scilicet personae. Et hoc prohibetur per hoc quod dicitur, non occides. Quandoque autem in personam coniunctam quantum ad propagationem prolis. Et hoc prohibetur cum dicitur, non moechaberis. Quandoque autem in rem possessam, quae ordinatur ad utrumque.

Et quantum ad hoc dicitur, non furtum facies. Nocumentum autem oris prohibetur cum dicitur, non loqueris contra proximum tuum falsum testimonium.

Nocumentum autem cordis prohibetur cum dicitur, non concupisces.

Et secundum hanc etiam differentiam possent distingui tria praecepta ordinantia in deum.

Quorum primum pertinet ad opus, unde ibi dicitur, non facies sculptile. Secundum ad os, unde dicitur, non assumes nomen dei tui in vanum. Tertium pertinet ad cor, quia in sanctificatione sabbati, secundum quod est morale praeceptum, praecipitur quies cordis in deum.

Vel, secundum Augustinum, per primum praeceptum reveremur unitatem primi principii; per secundum, veritatem divinam; per tertium, eius bonitatem, qua sanctificamur, et in qua quiescimus sicut in fine.

Ad 1

Ad primum ergo potest responderi dupliciter. Primo quidem, quia praecepta Decalogi referuntur ad praecepta dilectionis.

Fuit autem dandum praeceptum homini de dilectione dei et proximi, quia quantum ad hoc lex naturalis obscurata erat propter peccatum, non autem quantum ad dilectionem sui ipsius, quia quantum ad hoc lex naturalis vigebat.

Vel quia etiam dilectio sui ipsius includitur in dilectione dei et proximi, in hoc enim homo vere se diligit, quod se ordinat in deum. Et ideo etiam in praeceptis Decalogi ponuntur solum praecepta pertinentia ad proximum et ad deum.

Aliter potest dici quod praecepta Decalogi sunt illa quae immediate populus recepit a deo, unde dicitur Deut. X, scripsit in tabulis, iuxta id quod prius scripserat, verba decem, quae locutus est ad vos dominus.

Unde oportet praecepta Decalogi talia esse quae statim in mente populi cadere possunt. Praeceptum autem habet rationem debiti. Quod autem homo ex necessitate debeat aliquid deo vel proximo, hoc de facili cadit in conceptione hominis, et praecipue fidelis. Sed quod aliquid ex necessitate sit debitum homini de his quae pertinent ad seipsum et non ad alium, hoc non ita in promptu apparet, videtur enim primo aspectu quod quilibet sit liber in his quae ad ipsum pertinent.

Et ideo praecepta quibus prohibentur inordinationes hominis ad seipsum, perveniunt ad populum mediante instructione sapientum.

Unde non pertinent ad Decalogum.

Ad 2

Ad secundum dicendum quod omnes solemnitates legis veteris sunt institutae in commemorationem alicuius divini beneficii vel praeteriti commemorati, vel futuri praefigurati. Et similiter propter hoc omnia sacrificia offerebantur.

Inter omnia autem beneficia dei commemoranda, primum et praecipuum erat beneficium creationis, quod commemoratur in sanctificatione sabbati, unde Exod. XX pro ratione huius praecepti ponitur, sex enim diebus fecit deus caelum et terram etc..

Inter omnia autem futura beneficia, quae erant praefiguranda, praecipuum et finale erat quies mentis in deo, vel in praesenti per gratiam, vel in futuro per gloriam, quae etiam figurabatur per observantiam sabbati; unde dicitur Isaiae LVIII, si averteris a sabbato pedem tuum, facere voluntatem tuam in die sancto meo, et vocaveris sabbatum delicatum, et sanctum domini gloriosum.

Haec enim beneficia primo et principaliter sunt in mente hominum, maxime fidelium. Aliae vero solemnitates celebrantur propter aliqua particularia beneficia temporaliter transeuntia, sicut celebratio phase propter beneficium praeteritae liberationis ex Aegypto, et propter futuram passionem christi, quae temporaliter transivit, inducens nos in quietem sabbati spiritualis. Et ideo, praetermissis omnibus aliis solemnitatibus et sacrificiis, de solo sabbato fiebat mentio inter praecepta Decalogi.

Ad 3

Ad tertium dicendum quod, sicut apostolus dicit, ad Heb. VI, homines per maiorem sui iurant, et omnis controversiae eorum finis ad confirmationem est iuramentum.

Et ideo, quia iuramentum est omnibus commune, propter hoc prohibitio inordinationis circa iuramentum, specialiter praecepto Decalogi prohibetur. Peccatum vero falsae doctrinae non pertinet nisi ad paucos, unde non oportebat ut de hoc fieret mentio inter praecepta Decalogi. Quamvis etiam, quantum ad aliquem intellectum, in hoc quod dicitur, non assumes nomen dei tui in vanum, prohibeatur falsitas doctrinae, una enim Glossa exponit, non dices christum esse creaturam.

Ad 4

Ad quartum dicendum quod statim ratio naturalis homini dictat quod nulli iniuriam faciat, et ideo praecepta prohibentia nocumentum, extendunt se ad omnes. Sed ratio naturalis non statim dictat quod aliquid sit pro alio faciendum, nisi cui homo aliquid debet. Debitum autem filii ad patrem adeo est manifestum quod nulla tergiversatione potest negari, eo quod pater est principium generationis et esse, et insuper educationis et doctrinae. Et ideo non ponitur sub praecepto Decalogi ut aliquod beneficium vel obsequium alicui impendatur nisi parentibus. Parentes autem non videntur esse debitores filiis propter aliqua beneficia suscepta, sed potius e converso. Filius etiam est aliquid patris; et patres amant filios ut aliquid ipsorum, sicut dicit philosophus, in VIII ethic..

Unde eisdem rationibus non ponuntur aliqua praecepta Decalogi pertinentia ad amorem filiorum, sicut neque etiam aliqua ordinantia hominem ad seipsum.

Ad 5

Ad quintum dicendum quod delectatio adulterii, et utilitas divitiarum, sunt propter seipsa appetibilia, inquantum habent rationem boni delectabilis vel utilis. Et propter hoc oportuit in eis prohiberi non solum opus, sed etiam concupiscentiam.

Sed homicidium et falsitas sunt secundum seipsa horribilia, quia proximus et veritas naturaliter amantur, et non desiderantur nisi propter aliud. Et ideo non oportuit circa peccatum homicidii et falsi testimonii prohibere peccatum cordis, sed solum operis.

Ad 6

Ad sextum dicendum quod, sicut supra dictum est, omnes passiones irascibilis derivantur a passionibus concupiscibilis. Et ideo in praeceptis Decalogi, quae sunt quasi prima elementa legis, non erat mentio facienda de passionibus irascibilis, sed solum de passionibus concupiscibilis.