Summa Theologica

Chapter 321

_On the contrary,_ It is laid down in the _Decretals,_ dist. 4, that "laws are established when they are promulgated."

_I answer that,_ As stated above (A. 1), a law is imposed on others by way of a rule and measure. Now a rule or measure is imposed by being applied to those who are to be ruled and measured by it.

Wherefore, in order that a law obtain the binding force which is proper to a law, it must needs be applied to the men who have to be ruled by it. Such application is made by its being notified to them by promulgation. Wherefore promulgation is necessary for the law to obtain its force.

Thus from the four preceding articles, the definition of law may be gathered; and it is nothing else than an ordinance of reason for the common good, made by him who has care of the community, and promulgated.

Reply Obj. 1: The natural law is promulgated by the very fact that G.o.d instilled it into man"s mind so as to be known by him naturally.

Reply Obj. 2: Those who are not present when a law is promulgated, are bound to observe the law, in so far as it is notified or can be notified to them by others, after it has been promulgated.

Reply Obj. 3: The promulgation that takes place now, extends to future time by reason of the durability of written characters, by which means it is continually promulgated. Hence Isidore says (Etym.

v, 3; ii, 10) that "_lex_ (law) is derived from _legere_ (to read) because it is written."

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QUESTION 91

OF THE VARIOUS KINDS OF LAW (In Six Articles)

We must now consider the various kinds of law: under which head there are six points of inquiry:

(1) Whether there is an eternal law?

(2) Whether there is a natural law?

(3) Whether there is a human law?

(4) Whether there is a Divine law?

(5) Whether there is one Divine law, or several?

(6) Whether there is a law of sin?

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FIRST ARTICLE [I-II, Q. 91, Art. 1]

Whether There Is an Eternal Law?

Objection 1: It would seem that there is no eternal law. Because every law is imposed on someone. But there was not someone from eternity on whom a law could be imposed: since G.o.d alone was from eternity. Therefore no law is eternal.

Obj. 2: Further, promulgation is essential to law. But promulgation could not be from eternity: because there was no one to whom it could be promulgated from eternity. Therefore no law can be eternal.

Obj. 3: Further, a law implies order to an end. But nothing ordained to an end is eternal: for the last end alone is eternal. Therefore no law is eternal.

_On the contrary,_ Augustine says (De Lib. Arb. i, 6): "That Law which is the Supreme Reason cannot be understood to be otherwise than unchangeable and eternal."

_I answer that,_ As stated above (Q. 90, A. 1, ad 2; AA. 3, 4), a law is nothing else but a dictate of practical reason emanating from the ruler who governs a perfect community. Now it is evident, granted that the world is ruled by Divine Providence, as was stated in the First Part (Q. 22, AA. 1, 2), that the whole community of the universe is governed by Divine Reason. Wherefore the very Idea of the government of things in G.o.d the Ruler of the universe, has the nature of a law. And since the Divine Reason"s conception of things is not subject to time but is eternal, according to Prov. 8:23, therefore it is that this kind of law must be called eternal.

Reply Obj. 1: Those things that are not in themselves, exist with G.o.d, inasmuch as they are foreknown and preordained by Him, according to Rom. 4:17: "Who calls those things that are not, as those that are." Accordingly the eternal concept of the Divine law bears the character of an eternal law, in so far as it is ordained by G.o.d to the government of things foreknown by Him.

Reply Obj. 2: Promulgation is made by word of mouth or in writing; and in both ways the eternal law is promulgated: because both the Divine Word and the writing of the Book of Life are eternal. But the promulgation cannot be from eternity on the part of the creature that hears or reads.

Reply Obj. 3: The law implies order to the end actively, in so far as it directs certain things to the end; but not pa.s.sively--that is to say, the law itself is not ordained to the end--except accidentally, in a governor whose end is extrinsic to him, and to which end his law must needs be ordained. But the end of the Divine government is G.o.d Himself, and His law is not distinct from Himself. Wherefore the eternal law is not ordained to another end.

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SECOND ARTICLE [I-II, Q. 91, Art. 2]

Whether There Is in Us a Natural Law?

Objection 1: It would seem that there is no natural law in us.

Because man is governed sufficiently by the eternal law: for Augustine says (De Lib. Arb. i) that "the eternal law is that by which it is right that all things should be most orderly." But nature does not abound in superfluities as neither does she fail in necessaries. Therefore no law is natural to man.

Obj. 2: Further, by the law man is directed, in his acts, to the end, as stated above (Q. 90, A. 2). But the directing of human acts to their end is not a function of nature, as is the case in irrational creatures, which act for an end solely by their natural appet.i.te; whereas man acts for an end by his reason and will. Therefore no law is natural to man.

Obj. 3: Further, the more a man is free, the less is he under the law. But man is freer than all the animals, on account of his free-will, with which he is endowed above all other animals. Since therefore other animals are not subject to a natural law, neither is man subject to a natural law.

_On the contrary,_ A gloss on Rom. 2:14: "When the Gentiles, who have not the law, do by nature those things that are of the law," comments as follows: "Although they have no written law, yet they have the natural law, whereby each one knows, and is conscious of, what is good and what is evil."

_I answer that,_ As stated above (Q. 90, A. 1, ad 1), law, being a rule and measure, can be in a person in two ways: in one way, as in him that rules and measures; in another way, as in that which is ruled and measured, since a thing is ruled and measured, in so far as it partakes of the rule or measure. Wherefore, since all things subject to Divine providence are ruled and measured by the eternal law, as was stated above (A. 1); it is evident that all things partake somewhat of the eternal law, in so far as, namely, from its being imprinted on them, they derive their respective inclinations to their proper acts and ends. Now among all others, the rational creature is subject to Divine providence in the most excellent way, in so far as it partakes of a share of providence, by being provident both for itself and for others. Wherefore it has a share of the Eternal Reason, whereby it has a natural inclination to its proper act and end: and this partic.i.p.ation of the eternal law in the rational creature is called the natural law. Hence the Psalmist after saying (Ps. 4:6): "Offer up the sacrifice of justice," as though someone asked what the works of justice are, adds: "Many say, Who showeth us good things?" in answer to which question he says: "The light of Thy countenance, O Lord, is signed upon us": thus implying that the light of natural reason, whereby we discern what is good and what is evil, which is the function of the natural law, is nothing else than an imprint on us of the Divine light. It is therefore evident that the natural law is nothing else than the rational creature"s partic.i.p.ation of the eternal law.

Reply Obj. 1: This argument would hold, if the natural law were something different from the eternal law: whereas it is nothing but a partic.i.p.ation thereof, as stated above.

Reply Obj. 2: Every act of reason and will in us is based on that which is according to nature, as stated above (Q. 10, A. 1): for every act of reasoning is based on principles that are known naturally, and every act of appet.i.te in respect of the means is derived from the natural appet.i.te in respect of the last end.

Accordingly the first direction of our acts to their end must needs be in virtue of the natural law.

Reply Obj. 3: Even irrational animals partake in their own way of the Eternal Reason, just as the rational creature does. But because the rational creature partakes thereof in an intellectual and rational manner, therefore the partic.i.p.ation of the eternal law in the rational creature is properly called a law, since a law is something pertaining to reason, as stated above (Q. 90, A. 1). Irrational creatures, however, do not partake thereof in a rational manner, wherefore there is no partic.i.p.ation of the eternal law in them, except by way of similitude.

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THIRD ARTICLE [I-II, Q. 91, Art. 3]

Whether There Is a Human Law?

Objection 1: It would seem that there is not a human law. For the natural law is a partic.i.p.ation of the eternal law, as stated above (A. 2). Now through the eternal law "all things are most orderly," as Augustine states (De Lib. Arb. i, 6). Therefore the natural law suffices for the ordering of all human affairs. Consequently there is no need for a human law.

Obj. 2: Further, a law bears the character of a measure, as stated above (Q. 90, A. 1). But human reason is not a measure of things, but vice versa, as stated in _Metaph._ x, text. 5. Therefore no law can emanate from human reason.

Obj. 3: Further, a measure should be most certain, as stated in _Metaph._ x, text. 3. But the dictates of human reason in matters of conduct are uncertain, according to Wis. 9:14: "The thoughts of mortal men are fearful, and our counsels uncertain." Therefore no law can emanate from human reason.

_On the contrary,_ Augustine (De Lib. Arb. i, 6) distinguishes two kinds of law, the one eternal, the other temporal, which he calls human.

_I answer that,_ As stated above (Q. 90, A. 1, ad 2), a law is a dictate of the practical reason. Now it is to be observed that the same procedure takes place in the practical and in the speculative reason: for each proceeds from principles to conclusions, as stated above (ibid.). Accordingly we conclude that just as, in the speculative reason, from naturally known indemonstrable principles, we draw the conclusions of the various sciences, the knowledge of which is not imparted to us by nature, but acquired by the efforts of reason, so too it is from the precepts of the natural law, as from general and indemonstrable principles, that the human reason needs to proceed to the more particular determination of certain matters.

These particular determinations, devised by human reason, are called human laws, provided the other essential conditions of law be observed, as stated above (Q. 90, AA. 2, 3, 4). Wherefore Tully says in his _Rhetoric_ (De Invent. Rhet. ii) that "justice has its source in nature; thence certain things came into custom by reason of their utility; afterwards these things which emanated from nature and were approved by custom, were sanctioned by fear and reverence for the law."

Reply Obj. 1: The human reason cannot have a full partic.i.p.ation of the dictate of the Divine Reason, but according to its own mode, and imperfectly. Consequently, as on the part of the speculative reason, by a natural partic.i.p.ation of Divine Wisdom, there is in us the knowledge of certain general principles, but not proper knowledge of each single truth, such as that contained in the Divine Wisdom; so too, on the part of the practical reason, man has a natural partic.i.p.ation of the eternal law, according to certain general principles, but not as regards the particular determinations of individual cases, which are, however, contained in the eternal law.

Hence the need for human reason to proceed further to sanction them by law.

Reply Obj. 2: Human reason is not, of itself, the rule of things: but the principles impressed on it by nature, are general rules and measures of all things relating to human conduct, whereof the natural reason is the rule and measure, although it is not the measure of things that are from nature.

Reply Obj. 3: The practical reason is concerned with practical matters, which are singular and contingent: but not with necessary things, with which the speculative reason is concerned. Wherefore human laws cannot have that inerrancy that belongs to the demonstrated conclusions of sciences. Nor is it necessary for every measure to be altogether unerring and certain, but according as it is possible in its own particular genus.

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