Thomas Aquinas

“ With regard to good men, the Law was given to them as a help; which was most needed by the people, at the time when the natural law began to be obscured on account of the exuberance of sin: for it was fitting that this help should be bestowed on men in an orderly manner, so that they might be led from imperfection to perfection; wherefore it was becoming that the Old Law should be given between the law of nature and the law of grace. ”

“ The law is said to have been deadly, as being not the cause, but the occasion of death, on account of its imperfection: in so far as it did not confer grace enabling man to fulfil what is prescribed, and to avoid what it forbade. ”

“ The more a man is united to God, the better his state becomes: wherefore the more the Jewish people were bound to the worship of God, the greater their excellence over other peoples. Hence it is written (Dt. 4:8) : "What other nation is there so renowned that hath ceremonies and just judgments, and all the law?" In like manner, from this point of view, the state of clerics is better than that of the laity, and the state of religious than that of folk living in the world. ”

“ On the other hand, the end of the Divine law is to bring man to that end which is everlasting happiness; which end is hindered by any sin, not only of external, but also of internal action. Consequently that which suffices for the perfection of human law, viz. the prohibition and punishment of sin, does not suffice for the perfection of the Divine law: but it is requisite that it should make man altogether fit to partake of everlasting happiness. Now this cannot be done save by the grace of the Holy Ghost, whereby "charity" which fulfilleth the law . ”

“ Because he who, out of generosity, gives of his own to one and not to another, is not a respecter of persons: but if he were a dispenser of goods held in common, and were not to distribute them according to personal merits, he would be a respecter of persons. Now God bestows the benefits of salvation on the human race gratuitously: wherefore He is not a respecter of persons, if He gives them to some rather than to others. ”

“ Thus a medicine is perfectly good, if it gives health to a man; but it is imperfect, if it helps to cure him, without being able to bring him back to health. Again it must be observed that the end of human law is different from the end of Divine law. For the end of human law is the temporal tranquillity of the state, which end law effects by directing external actions, as regards those evils which might disturb the peaceful condition of the state. ”

“ Now it is to be observed that wherever there is an order of powers or arts, he that holds the highest place, himself exercises the principal and perfect acts; while those things which dispose to the ultimate perfection are effected by him through his subordinates: thus the ship-builder himself rivets the planks together, but prepares the material by means of the workmen who assist him under his direction. ”

“ I answer that, It might be assigned as a reason for the Law being given to the Jews rather than to other peoples, that the Jewish people alone remained faithful to the worship of one God, while the others turned away to idolatry ”

“ For the devil would not make a law whereby men would be led to Christ, Who was to cast him out, according to Mat. 12:26: "If Satan cast out Satan, his kingdom is divided" [Vulg.: 'he is divided against himself'] . ”

“ Therefore the Old Law was given by the same God, from Whom came salvation to man, through the grace of Christ.
Reply to Objection 1: Nothing prevents a thing being not perfect simply, and yet perfect in respect of time: thus a boy is said to be perfect, not simply, but with regard to the condition of time. So, too, precepts that are given to children are perfect in comparison with the condition of those to whom they are given, although they are not perfect simply. ”

“ If therefore other men could be saved without the observance of the Old Law, the Jews would be in a worse plight than other men.
Objection 3: Further, the Gentiles were admitted to the Jewish ritual and to the observances of the Law: for it is written (Ex. 12:48) : "If any stranger be willing to dwell among you, and to keep the Phase of the Lord, all his males shall first be circumcised, and then shall he celebrate it according to the manner; and he shall be as he that is born in the land." ”

“ The benefits of grace are forfeited by man on account of sin: but not the benefits of nature. Among the latter are the ministries of the angels, which the very order of various natures demands, viz. that the lowest beings be governed through the intermediate beings: and also bodily aids, which God vouchsafes not only to men, but also to beasts, according to Ps. 35:7: "Men and beasts Thou wilt preserve, O Lord."
Art. 5 - Whether all men were bound to observe the Old Law? Objection 1: It would seem that all men were bound to observe the Old Law. ”

“ In things ordained to an end, there is perfect goodness when a thing is such that it is sufficient in itself to conduce to the end: while there is imperfect goodness when a thing is of some assistance in attaining the end, but is not sufficient for the realization thereof. ”