On the contrary, It is written ( Prov. 8:29 ): "When He compassed the sea with its bounds, and set a law to the waters, that they should not pass their limits."
I answer that, We must speak otherwise of the law of man, than of the eternal law which is the law of God. For the law of man extends only to rational creatures subject to man. The reason of this is because law directs the actions of those that are subject to the government of someone: wherefore, properly speaking, none imposes a law on his own actions. Now whatever is done regarding the use of irrational things subject to man, is done by the act of man himself moving those things, for these irrational creatures do not move themselves, but are moved by others, as stated above (Q[1], A[2]). Consequently man cannot impose laws on irrational beings, however much they may be subject to him. But he can impose laws on rational beings subject to him, in so far as by his command or pronouncement of any kind, he imprints on their minds a rule which is a principle of action.
Now just as man, by such pronouncement, impresses a kind of inward principle of action on the man that is subject to him, so God imprints on the whole of nature the principles of its proper actions. And so, in this way, God is said to command the whole of nature, according to Ps. 148:6 : "He hath made a decree, and it shall not pass away." And thus all actions and movements of the whole of nature are subject to the eternal law. Consequently irrational creatures are subject to the eternal law, through being moved by Divine providence; but not, as rational creatures are, through understanding the Divine commandment.
Reply to Objection 1: The impression of an inward active principle is to natural things, what the promulgation of law is to men: because law, by being promulgated, imprints on man a directive principle of human actions, as stated above.
Reply to Objection 2: Irrational creatures neither partake of nor are obedient to human reason: whereas they do partake of the Divine Reason by obeying it; because the power of Divine Reason extends over more things than human reason does. And as the members of the human body are moved at the command of reason, and yet do not partake of reason, since they have no apprehension subordinate to reason; so too irrational creatures are moved by God, without, on that account, being rational.
Reply to Objection 3: Although the defects which occur in natural things are outside the order of particular causes, they are not outside the order of universal causes, especially of the First Cause, i.e. God, from Whose providence nothing can escape, as stated in the FP, Q[22], A[2]. And since the eternal law is the type of Divine providence, as stated above (A[1]), hence the defects of natural things are subject to the eternal law.
Whether all human affairs are subject to the eternal law?
Objection 1: It would seem that not all human affairs are subject to the eternal law. For the Apostle says ( Gal. 5:18 ): "If you are led by the spirit you are not under the law." But the righteous who are the sons of God by adoption, are led by the spirit of God, according to Rom. 8:14 : "Whosoever are led by the spirit of God, they are the sons of God." Therefore not all men are under the eternal law.
Objection 2: Further, the Apostle says ( Rom. 8:7 ): "The prudence [Vulg.: 'wisdom'] of the flesh is an enemy to God: for it is not subject to the law of God." But many are those in whom the prudence of the flesh dominates. Therefore all men are not subject to the eternal law which is the law of God.
Objection 3: Further, Augustine says (De Lib. Arb. i, 6) that "the eternal law is that by which the wicked deserve misery, the good, a life of blessedness." But those who are already blessed, and those who are already lost, are not in the state of merit. Therefore they are not under the eternal law.
On the contrary, Augustine says (De Civ. Dei xix, 12): "Nothing evades the laws of the most high Creator and Governor, for by Him the peace of the universe is administered."
I answer that, There are two ways in which a thing is subject to the eternal law, as explained above (A[5]): first, by partaking of the eternal law by way of knowledge; secondly, by way of action and passion, i.e. by partaking of the eternal law by way of an inward motive principle: and in this second way, irrational creatures are subject to the eternal law, as stated above (A[5]). But since the rational nature, together with that which it has in common with all creatures, has something proper to itself inasmuch as it is rational, consequently it is subject to the eternal law in both ways; because while each rational creature has some knowledge of the eternal law, as stated above (A[2]), it also has a natural inclination to that which is in harmony with the eternal law; for "we are naturally adapted to the recipients of virtue" (Ethic. ii, 1).
Both ways, however, are imperfect, and to a certain extent destroyed, in the wicked; because in them the natural inclination to virtue is corrupted by vicious habits, and, moreover, the natural knowledge of good is darkened by passions and habits of sin. But in the good both ways are found more perfect: because in them, besides the natural knowledge of good, there is the added knowledge of faith and wisdom; and again, besides the natural inclination to good, there is the added motive of grace and virtue.
Accordingly, the good are perfectly subject to the eternal law, as always acting according to it: whereas the wicked are subject to the eternal law, imperfectly as to their actions, indeed, since both their knowledge of good, and their inclination thereto, are imperfect; but this imperfection on the part of action is supplied on the part of passion, in so far as they suffer what the eternal law decrees concerning them, according as they fail to act in harmony with that law. Hence Augustine says (De Lib. Arb. i, 15): "I esteem that the righteous act according to the eternal law; and (De Catech. Rud. xviii): Out of the just misery of the souls which deserted Him, God knew how to furnish the inferior parts of His creation with most suitable laws."
Reply to Objection 1: This saying of the Apostle may be understood in two ways. First, so that a man is said to be under the law, through being pinned down thereby, against his will, as by a load. Hence, on the same passage a gloss says that "he is under the law, who refrains from evil deeds, through fear of punishment threatened by the law, and not from love of virtue." In this way the spiritual man is not under the law, because he fulfils the law willingly, through charity which is poured into his heart by the Holy Ghost. Secondly, it can be understood as meaning that the works of a man, who is led by the Holy Ghost, are the works of the Holy Ghost rather than his own. Therefore, since the Holy Ghost is not under the law, as neither is the Son, as stated above (A[4], ad 2); it follows that such works, in so far as they are of the Holy Ghost, are not under the law. The Apostle witnesses to this when he says ( 2 Cor. 3:17 ): "Where the Spirit of the Lord is, there is liberty."
Reply to Objection 2: The prudence of the flesh cannot be subject to the law of God as regards action; since it inclines to actions contrary to the Divine law: yet it is subject to the law of God, as regards passion; since it deserves to suffer punishment according to the law of Divine justice. Nevertheless in no man does the prudence of the flesh dominate so far as to destroy the whole good of his nature: and consequently there remains in man the inclination to act in accordance with the eternal law. For we have seen above (Q[85], A[2]) that sin does not destroy entirely the good of nature.
Reply to Objection 3: A thing is maintained in the end and moved towards the end by one and the same cause: thus gravity which makes a heavy body rest in the lower place is also the cause of its being moved thither. We therefore reply that as it is according to the eternal law that some deserve happiness, others unhappiness, so is it by the eternal law that some are maintained in a happy state, others in an unhappy state. Accordingly both the blessed and the damned are under the eternal law.