Here, however, we meet the opposite argument, stated on different occasions in different terms, but usually summed up in this, that the law itself is a part of the contract, and therefore cannot impair it. What does this mean? Let us seek for clear ideas. It does not mean that the law gives any particular construction to the terms of the contract, or that it makes the promise, or the consideration, or the time of performance, other than is expressed in the instrument itself. It can only mean, that it is to be taken as a part of the contract, or understanding of the parties, that the contract itself shall be enforced by such laws and regulations, respecting remedy and for the enforcement of contracts, as are in being in the State where it is made at the time of entering into it. This is meant, or nothing very clearly intelligible is meant, by saying the law is part of the contract.

There is no authority in adjudged cases for the plaintiff in error but the State decisions which have been cited, and, as has already been stated, they all rest on this reason, that the law is part of the contract.

Against this we contend,—

1st. That, if the proposition were true, the consequence would not follow.

2d. That the proposition itself cannot be maintained.

1. If it were true that the law is to be considered as part of the contract, the consequence contended for would not follow; because, if this statute be part of the contract, so is every other legal or constitutional provision existing at the time which affects the contract, or which is capable of affecting it; and especially this very article of the Constitution of the United States is part of the contract. The plaintiff in error argues in a complete circle. He supposes the parties to have had reference to it because it was a binding law, and yet he proves it to be a binding law only upon the ground that such reference was made to it. We come before the court alleging the law to be void, as unconstitutional; they stop the inquiry by opposing to us the law itself. Is this logical? Is it not precisely objectio ejus, cujus dissolutio petitur? If one bring a bill to set aside a judgment, is that judgment itself a good plea in bar to the bill? We propose to inquire if this law is of force to control our contract, or whether, by the Constitution of the United States, such force be not denied to it. The plaintiff in error stops us by saying that it does control the contract, and so arrives shortly at the end of the debate. Is it not obvious, that, supposing the act of New York to be a part of the contract, the question still remains as undecided as ever. What is that act? Is it a law, or is it a nullity? a thing of force, or a thing of no force? Suppose the parties to have contemplated this act, what did they contemplate? its words only, or its legal effect? its words, or the force which the Constitution of the United States allows to it? If the parties contemplated any law, they contemplated all the law that bore on their contract, the aggregate of all the statute and constitutional provisions. To suppose that they had in view one statute without regarding others, or that they contemplated a statute without considering that paramount constitutional provisions might control or qualify that statute, or abrogate it altogether, is unreasonable and inadmissible. "This contract," says one of the authorities relied on, "is to be construed as if the law were specially recited in it." Let it be so for the sake of argument. But it is also to be construed as if the prohibitory clause of the Constitution were recited in it, and this brings us back again to the precise point from which we departed.

The Constitution always accompanies the law, and the latter can have no force which the former does not allow to it. If the reasoning were thrown into the form of special pleading, it would stand thus: the plaintiff declares on his debt; the defendant pleads his discharge under the law; the plaintiff alleges the law unconstitutional; but the defendant says, You knew of its existence; to which the answer is obvious and irresistible, I knew its existence on the statute-book of New York, but I knew, at the same time, it was null and void under the Constitution of the United States.

The language of another leading decision is, "A law in force at the time of making the contract does not violate that contract"; but the very question is, whether there be any such law "in force"; for if the States have no authority to pass such laws, then no such law can be in force. The Constitution is a part of the contract as much as the law, and was as much in the contemplation of the parties. So that the proposition, if it be admitted that the law is part of the contract, leaves us just where it found us: that is to say, under the necessity of comparing the law with the Constitution, and of deciding by such comparison whether it be valid or invalid. If the law be unconstitutional, it is void, and no party can be supposed to have had reference to a void law. If it be constitutional, no reference to it need be supposed.

2. But the proposition itself cannot be maintained. The law is no part of the contract. What part is it? the promise? the consideration? the condition? Clearly, it is neither of these. It is no term of the contract. It acts upon the contract only when it is broken, or to discharge the party from its obligation after it is broken. The municipal law is the force of society employed to compel the performance of contracts. In every judgment in a suit on contract, the damages are given, and the imprisonment of the person or sale of goods awarded, not in performance of the contract, or as part of the contract, but as an indemnity for the breach of the contract. Even interest, which is a strong case, where it is not expressed in the contract itself, can only be given as damages. It is all but absurd to say that a man's goods are sold on a fieri facias, or that he himself goes to jail, in pursuance of his contract. These are the penalties which the law inflicts for the breach of his contract. Doubtless, parties, when they enter into contracts, may well consider both what their rights and what their liabilities will be by the law, if such contracts be broken; but this contemplation of consequences which can ensue only when the contract is broken, is no part of the contract itself. The law has nothing to do with the contract till it be broken; how, then, can it be said to form a part of the contract itself?

But there are other cogent and more specific reasons against considering the law as part of the contract. (1.) If the law be part of the contract, it cannot be repealed or altered; because, in such case, the repealing or modifying law itself would impair the obligation of the contract. The insolvent law of New York, for example, authorizes the discharge of a debtor on the consent of two thirds of his creditors. A subsequent act requires the consent of three fourths; but if the existing law be part of the contract, this latter law would be void. In short, nothing which is part of the contract can be varied but by consent of the parties; therefore the argument runs in absurdum; for it proves that no laws for enforcing the contract, or giving remedies upon it, or any way affecting it, can be changed or modified between its creation and its end. If the law in question binds one party on the ground of assent to it, it binds both, and binds them until they agree to terminate its operation. (2.) If the party be bound by an implied assent to the law, as thereby making the law a part of the contract, how would it be if the parties had expressly dissented, and agreed that the law should make no part of the contract? Suppose the promise to have been, that the promisor would pay at all events, and not take advantage of the statute; still, would not the statute operate on the whole,—on this particular agreement and all? and does not this show that the law is no part of the contract, but something above it? (3.) If the law of the place be part of the contract, one of its terms and conditions, how could it be enforced, as we all know it might be, in another jurisdiction, which should have no regard to the law of the place? Suppose the parties, after the contract, to remove to another State, do they carry the law with them as part of their contract? We all know they do not. Or take a common case. Some States have laws abolishing imprisonment for debt; these laws, according to the argument, are all parts of the contract; how, then, can the party, when sued in another State, be imprisoned contrary to the terms of his contract? (4.) The argument proves too much, inasmuch as it applies as strongly to prior as to subsequent contracts. It is founded on a supposed assent to the exercise of legislative authority, without considering whether that exercise be legal or illegal. But it is equally fair to found the argument on an implied assent to the potential exercise of that authority. The implied reference to the control of legislative power is as reasonable and as strong when that power is dormant, as while it is in exercise. In one case, the argument is, "The law existed, you knew it, and acquiesced." In the other it is, "The power to pass the law existed, you knew it, and took your chance." There is as clear an assent in one instance as in the other. Indeed, it is more reasonable and more sensible to imply a general assent to all the laws of society, present and to come, from the fact of living in it, than it is to imply a particular assent to a particular existing enactment. The true view of the matter is, that every man is presumed to submit to all power which may be lawfully exercised over him or his right, and no one should be presumed to submit to illegal acts of power, whether actual or contingent. (5.) But a main objection to this argument is, that it would render the whole constitutional provision idle and inoperative; and no explanatory words, if such words had been added in the Constitution, could have prevented this consequence. The law, it is said, is part of the contract; it cannot, therefore, impair the contract, because a contract cannot impair itself. Now, if this argument be sound, the case would have been the same, whatever words the Constitution had used. If, for example, it had declared that no State should pass any law impairing contracts prospectively or retrospectively; or any law impairing contracts, whether existing or future; or, whatever terms it had used to prohibit precisely such a law as is now before the court,—the prohibition would be totally nugatory if the law is to be taken as part of the contract; and the result would be, that, whatever may be the laws which the States by this clause of the Constitution are prohibited from passing, yet, if they in fact do pass such laws, those laws are valid, and bind parties by a supposed assent.