Thomas Aquinas

“ Now it is evident that a thing is so much the more easily grasped by the reason, as its contrary is more grievous and repugnant to reason. Moreover, it is clear, since the order of reason begins with the end, that, for a man to be inordinately disposed towards his end, is supremely contrary to reason. Now the end of human life and society is God. Consequently it was necessary for the precepts of the decalogue, first of all, to direct man to God ”

“ Wherefore he that honors his father and mother, is bound to honor them from charity, not in virtue of the precept, "Honor thy father and mother," but in virtue of the precept, "Thou shalt love the Lord thy God with thy whole heart." And since these are two affirmative precepts, not binding for all times, they can be binding, each one at a different time: so that it may happen that a man fulfils the precept of honoring his father and mother, without at the same time breaking the precept concerning the omission of the mode of charity. ”

“ The slaying of a man is forbidden in the decalogue, in so far as it bears the character of something undue: for in this sense the precept contains the very essence of justice. Human law cannot make it lawful for a man to be slain unduly. But it is not undue for evil-doers or foes of the common weal to be slain: hence this is not contrary to the precept of the decalogue ”

“ It is therefore evident that the Divine law fittingly proposes precepts about the acts of all the virtues: yet so that certain matters, without which the order of virtue, which is the order of reason, cannot even exist, come under an obligation of precept; while other matters, which pertain to the well-being of perfect virtue, come under an admonition of counsel. ”

“ Worship is merely a declaration of faith: wherefore the precepts about worship should not be reckoned as distinct from those about faith. Nevertheless precepts should be given about worship rather than about faith, because the precept about faith is presupposed to the precepts of the decalogue, as is also the precept of charity. For just as the first general principles of the natural law are self-evident to a subject having natural reason, and need no promulgation ”

“ Likewise when Abraham consented to slay his son, he did not consent to murder, because his son was due to be slain by the command of God, Who is Lord of life and death: for He it is Who inflicts the punishment of death on all men, both godly and ungodly, on account of the sin of our first parent, and if a man be the executor of that sentence by Divine authority, he will be no murderer any more than God would be. ”

“ 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. ”

“ Now man, the framer of human law, is competent to judge only of outward acts; because "man seeth those things that appear," according to 1 Kings 16:7: while God alone, the framer of the Divine law, is competent to judge of the inward movements of wills, according to Ps. 7:10: "The searcher of hearts and reins is God." Accordingly, therefore, we must say that the mode of virtue is in some sort regarded both by human and by Divine law; in some respect it is regarded by the Divine, but not by the human law; and in another way, it is regarded neither by the human nor by the Divine law. ”

“ For human law does not punish the man who wishes to slay, and slays not: whereas the Divine law does, according to Mat. 5:22: "Whosoever is angry with his brother, shall be in danger of the judgment." ”

“ If therefore there by any precepts which contain the very preservation of the common good, or the very order of justice and virtue, such precepts contain the intention of the lawgiver, and therefore are indispensable. For instance, if in some community a law were enacted, such as this---that no man should work for the destruction of the commonwealth, or betray the state to its enemies, or that no man should do anything unjust or evil, such precepts would not admit of dispensation. ”

“ Punishments are necessary against those who are prone to evil, as stated in Ethic. x, 9. Wherefore a threat of punishment is only affixed to those precepts of the law which forbade evils to which men were prone. Now men were prone to idolatry by reason of the general custom of the nations. Likewise men are prone to perjury on account of the frequent use of oaths. Hence it is that a threat is affixed to the first two precepts. ”

“ But to work with pleasure, i.e. joyfully or cheerfully, in one respect falls under the precept, viz. in so far as pleasure ensues from the love of God and one's neighbor (which love falls under the precept) , and love causes pleasure: and in another respect does not fall under the precept, in so far as pleasure ensues from a habit; for "pleasure taken in a work proves the existence of a habit," as stated in Ethic. ii, 3. For an act may give pleasure either on account of its end, or through its proceeding from a becoming habit. ”

“ Affirmation of one thing always leads to the denial of its opposite: but the denial of one opposite does not always lead to the affirmation of the other. For it follows that if a thing is white, it is not black: but it does not follow that if it is not black, it is white: because negation extends further than affirmation. And hence too, that one ought not to do harm to another, which pertains to the negative precepts, extends to more persons, as a primary dictate of reason, than that one ought to do someone a service or kindness. ”

“ Now human law is ordained for one kind of community, and the Divine law for another kind. Because human law is ordained for the civil community, implying mutual duties of man and his fellows: and men are ordained to one another by outward acts, whereby men live in communion with one another. This life in common of man with man pertains to justice, whose proper function consists in directing the human community. Wherefore human law makes precepts only about acts of justice ”

“ Further, man stands in the same relation to human law as God does to Divine law. But man can dispense with the precepts of a law made by man. Therefore, since the precepts of the decalogue are ordained by God, it seems that God can dispense with them. ”

“ But man is preserved from the stain of sin, and his soul is converted to God by other moral precepts besides those of the decalogue. Therefore it was right for the Law to include other moral precepts. ”

“ 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. ”

“ Just as God is the universal principle of being in respect of all things, so is a father a principle of being in respect of his son. Therefore the precept regarding parents was fittingly placed after the precepts regarding God. ”

“ Nevertheless it is a primary dictate of reason that man is a debtor in the point of rendering a service or kindness to those from whom he has received kindness, if he has not yet repaid the debt. Now there are two whose favors no man can sufficiently repay, viz. God and man's father, as stated in Ethic. viii, 14. Therefore it is that there are only two affirmative precepts; one about the honor due to parents, the other about the celebration of the Sabbath in memory of the Divine favor. ”

“ Since, however, the making of graven things or the likeness of anything is not forbidden except as to the point of their being worshipped as gods---for God commanded an image of the Seraphim [Vulg.: Cherubim] to be made and placed in the tabernacle, as related in Ex. 25:18---Augustine more fittingly unites these two, "Thou shalt not have strange gods before Me," and, "Thou shalt not make . . . any graven thing," into one precept. Likewise to covet another's wife, for the purpose of carnal knowledge, belongs to the concupiscence of the flesh ”

“ But He would deny Himself if He were to do away with the very order of His own justice, since He is justice itself. Wherefore God cannot dispense a man so that it be lawful for him not to direct himself to God, or not to be subject to His justice, even in those matters in which men are directed to one another. ”

“ And among sins of deed, murder which destroys life in one already living is more grievous than adultery, which imperils the life of the unborn child; and adultery is more grave than theft, which regards external goods.
Reply to Objection 1: Although our neighbor is better known than God by the way of the senses, nevertheless the love of God is the reason for the love of our neighbor, as shall be declared later on (SS, Q [25] , A [1] ; SS, Q [26] , A [2] ) . Hence the precepts ordaining man to God demanded precedence of the others. ”

“ Thus also, in an army, which is ordained to the commander as to its end, it is requisite first that the soldier should be subject to the commander, and the opposite of this is most grievous; and secondly it is requisite that he should be in coordination with the other soldiers. ”

“ And there are certain things which, after a more careful consideration, wise men deem obligatory. Such belong to the law of nature, yet so that they need to be inculcated, the wiser teaching the less wise: e.g. ”