I answer that, Restitution as stated above (A[1]) is an act of commutative justice, and this demands a certain equality. Wherefore restitution denotes the return of the thing unjustly taken; since it is by giving it back that equality is reestablished. If, however, it be taken away justly, there will be equality, and so there will be no need for restitution, for justice consists in equality. Since therefore the safeguarding of justice is necessary for salvation, it follows that it is necessary for salvation to restore what has been taken unjustly.
Reply to Objection 1: When it is impossible to repay the equivalent, it suffices to repay what one can, as in the case of honor due to God and our parents, as the Philosopher states (Ethic. viii, 14). Wherefore when that which has been taken cannot be restored in equivalent, compensation should be made as far as possible: for instance if one man has deprived another of a limb, he must make compensation either in money or in honor, the condition of either party being duly considered according to the judgment of a good man.
Reply to Objection 2: There are three ways in which one may take away another's good name. First, by saying what is true, and this justly, as when a man reveals another's sin, while observing the right order of so doing, and then he is not bound to restitution. Secondly, by saying what is untrue and unjustly, and then he is bound to restore that man's good name, by confessing that he told an untruth. Thirdly, by saying what is true, but unjustly, as when a man reveals another's sin contrarily to the right order of so doing, and then he is bound to restore his good name as far as he can, and yet without telling an untruth; for instance by saying that he spoke ill, or that he defamed him unjustly; or if he be unable to restore his good name, he must compensate him otherwise, the same as in other cases, as stated above (ad 1).
Reply to Objection 3: The action of the man who has defamed another cannot be undone, but it is possible, by showing him deference, to undo its effect, viz. the lowering of the other man's personal dignity in the opinion of other men.
Reply to Objection 4: There are several ways of preventing a man from obtaining a benefice. First, justly: for instance, if having in view the honor of God or the good of the Church, one procures its being conferred on a more worthy subject, and then there is no obligation whatever to make restitution or compensation. Secondly, unjustly, if the intention is to injure the person whom one hinders, through hatred, revenge or the like. In this case, if before the benefice has been definitely assigned to anyone, one prevents its being conferred on a worthy subject by counseling that it be not conferred on him, one is bound to make some compensation, after taking account of the circumstances of persons and things according to the judgment of a prudent person: but one is not bound in equivalent, because that man had not obtained the benefice and might have been prevented in many ways from obtaining it. If, on the other hand, the benefice had already been assigned to a certain person, and someone, for some undue cause procures its revocation, it is the same as though he had deprived a man of what he already possessed, and consequently he would be bound to compensation in equivalent, in proportion, however, to his means.
Whether it suffices to restore the exact amount taken?
Objection 1: It would seem that it is not sufficient to restore the exact amount taken. For it is written ( Ex. 22:1 ): "If a man shall steal an ox or a sheep and kill or sell it, he shall restore five oxen for one ox, and four sheep for one sheep." Now everyone is bound to keep the commandments of the Divine law. Therefore a thief is bound to restore four- or fivefold.
Objection 2: Further, "What things soever were written, were written for our learning" ( Rom. 15:4 ). Now Zachaeus said ( Lk. 19:8 ) to our Lord: "If I have wronged any man of any thing, I restore him fourfold." Therefore a man is bound to restore several times over the amount he has taken unjustly.
Objection 3: Further, no one can be unjustly deprived of what he is not bound to give. Now a judge justly deprives a thief of more than the amount of his theft, under the head of damages. Therefore a man is bound to pay it, and consequently it is not sufficient to restore the exact amount.
On the contrary, Restitution re-establishes equality where an unjust taking has caused inequality. Now equality is restored by repaying the exact amount taken. Therefore there is no obligation to restore more than the exact amount taken.
I answer that, When a man takes another's thing unjustly, two things must be considered. One is the inequality on the part of the thing, which inequality is sometimes void of injustice, as is the case in loans. The other is the sin of injustice, which is consistent with equality on the part of the thing, as when a person intends to use violence but fails.
As regards the first, the remedy is applied by making restitution, since thereby equality is re-established; and for this it is enough that a man restore just so much as he has belonging to another. But as regards the sin, the remedy is applied by punishment, the infliction of which belongs to the judge: and so, until a man is condemned by the judge, he is not bound to restore more than he took, but when once he is condemned, he is bound to pay the penalty.
Hence it is clear how to answer the First Objection: because this law fixes the punishment to be inflicted by the judge. Nor is this commandment to be kept now, because since the coming of Christ no man is bound to keep the judicial precepts, as stated above (FS, Q[104], A[3]). Nevertheless the same might be determined by human law, and then the same answer would apply.
Reply to Objection 2: Zachaeus said this being willing to do more than he was bound to do; hence he had said already: "Behold . . . the half of my goods I give to the poor."
Reply to Objection 3: By condemning the man justly, the judge can exact more by way of damages; and yet this was not due before the sentence.
Whether a man is bound to restore what he has not taken?
Objection 1: It would seem that a man is bound to restore what he has not taken. For he that has inflicted a loss on a man is bound to remove that loss. Now it happens sometimes that the loss sustained is greater than the thing taken: for instance, if you dig up a man's seeds, you inflict on the sower a loss equal to the coming harvest, and thus you would seem to be bound to make restitution accordingly. Therefore a man is bound to restore what he has not taken.
Objection 2: Further, he who retains his creditor's money beyond the stated time, would seem to occasion his loss of all his possible profits from that money, and yet he does not really take them. Therefore it seems that a man is bound to restore what he did not take.
Objection 3: Further, human justice is derived from Divine justice. Now a man is bound to restore to God more than he has received from Him, according to Mat. 25:26, "Thou knewest that I reap where I sow not, and gather where I have not strewed." Therefore it is just that one should restore to a man also, something that one has not taken.
On the contrary, Restitution belongs to justice, because it re-establishes equality. But if one were to restore what one did not take, there would not be equality. Therefore it is not just to make such a restitution.
I answer that, Whoever brings a loss upon another person, seemingly, takes from him the amount of the loss, since, according to the Philosopher (Ethic. v, 4) loss is so called from a man having "less"* than his due. [*The derivation is more apparent in English than in Latin, where 'damnum' stands for 'loss,' and 'minus' for 'less.' Aristotle merely says that to have more than your own is called 'gain,' and to have less than you started with is called 'loss.'] Therefore a man is bound to make restitution according to the loss he has brought upon another.
Now a man suffers a loss in two ways. First, by being deprived of what he actually has; and a loss of this kind is always to be made good by repayment in equivalent: for instance if a man damnifies another by destroying his house he is bound to pay him the value of the house. Secondly, a man may damnify another by preventing him from obtaining what he was on the way to obtain. A loss of this kind need not be made good in equivalent; because to have a thing virtually is less than to have it actually, and to be on the way to obtain a thing is to have it merely virtually or potentially, and so were he to be indemnified by receiving the thing actually, he would be paid, not the exact value taken from him, but more, and this is not necessary for salvation, as stated above. However he is bound to make some compensation, according to the condition of persons and things.
From this we see how to answer the First and Second Objections: because the sower of the seed in the field, has the harvest, not actually but only virtually. In like manner he that has money has the profit not yet actually but only virtually: and both may be hindered in many ways.
Reply to Objection 3: God requires nothing from us but what He Himself has sown in us. Hence this saying is to be understood as expressing either the shameful thought of the lazy servant, who deemed that he had received nothing from the other, or the fact that God expects from us the fruit of His gifts, which fruit is from Him and from us, although the gifts themselves are from God without us.
Whether restitution must always be made to the person from whom a thing has been taken?