Reply Obj. 3: The act of justice, in general, belongs to the moral precepts; but its determination to some special kind of act belongs to the judicial precepts. ________________________
FIFTH ARTICLE [I-II, Q. 99, Art. 5]
Whether the Old Law Contains Any Others Besides the Moral, Judicial, and Ceremonial Precepts?
Objection 1: It would seem that the Old Law contains others besides the moral, judicial, and ceremonial precepts. Because the judicial precepts belong to the act of justice, which is between man and man; while the ceremonial precepts belong to the act of religion, whereby God is worshipped. Now besides these there are many other virtues, viz. temperance, fortitude, liberality, and several others, as stated above (Q. 60, A. 5). Therefore besides the aforesaid precepts, the Old Law should comprise others.
Obj. 2: Further, it is written (Deut. 11:1): "Love the Lord thy God, and observe His precepts and ceremonies, His judgments and commandments." Now precepts concern moral matters, as stated above (A. 4). Therefore besides the moral, judicial and ceremonial precepts, the Law contains others which are called "commandments." [*The "commandments" (mandata) spoken of here and in the body of this article are not to be confused with the Commandments (praecepta) in the ordinary acceptance of the word.]
Obj. 3: Further, it is written (Deut. 6:17): "Keep the precepts of the Lord thy God, and the testimonies and ceremonies which I have [Vulg.: 'He hath'] commanded thee." Therefore in addition to the above, the Law comprises "testimonies."
Obj. 4: Further, it is written (Ps. 118:93): "Thy justifications (i.e. "Thy Law," according to a gloss) I will never forget." Therefore in the Old Law there are not only moral, ceremonial and judicial precepts, but also others, called "justifications."
On the contrary, It is written (Deut. 6:1): "These are the precepts and ceremonies and judgments which the Lord your God commanded . . . you." And these words are placed at the beginning of the Law. Therefore all the precepts of the Law are included under them.
I answer that, Some things are included in the Law by way of precept; other things, as being ordained to the fulfilment of the precepts. Now the precepts refer to things which have to be done: and to their fulfilment man is induced by two considerations, viz. the authority of the lawgiver, and the benefit derived from the fulfilment, which benefit consists in the attainment of some good, useful, pleasurable or virtuous, or in the avoidance of some contrary evil. Hence it was necessary that in the Old Law certain things should be set forth to indicate the authority of God the lawgiver: e.g. Deut. 6:4: "Hear, O Israel, the Lord our God is one Lord"; and Gen. 1:1: "In the beginning God created heaven and earth": and these are called "testimonies." Again it was necessary that in the Law certain rewards should be appointed for those who observe the Law, and punishments for those who transgress; as it may be seen in Deut. 28: "If thou wilt hear the voice of the Lord thy God . . . He will make thee higher than all the nations," etc.: and these are called "justifications," according as God punishes or rewards certain ones justly.
The things that have to be done do not come under the precept except in so far as they have the character of a duty. Now a duty is twofold: one according to the rule of reason; the other according to the rule of a law which prescribes that duty: thus the Philosopher distinguishes a twofold just—moral and legal (Ethic. v, 7).