...But the argument on which most reliance is placed, is drawn from that peculiar language of this clause. Congress is not empowered by it to make all laws, which may have relation to the powers confered on the government, but such only as may be "necessary and proper" for carrying them into execution. The word "necessary" is considered as controlling the whole sentence, and as limiting the right to pass laws for the execution of the granted powers, to such as are indispensable, and without which the power would be nugatory. That it excludes the choice of means, and leaves to congress, in each case, that only which is most direct and simple.
Is it true, that this is the sense in which the word "necessary" is always used? Does it always import an absolute physical necessity, so strong, that one thing to which another may be termed necessary, cannot exist without that other? We think it does not. If reference be had to its use, in the common affairs of the world, or in approved authors, we find that it frequently imports no more than that one thing is convenient, or useful, or essential to another. To employ the means necessary to an end, is generally understood as employing any means calculated to produce the end, and not as being confined to those single means, without which the end would be entirely unattainable. Such is the character of human language, that no word conveys to the mind, in all situations, one single definite idea; and nothing is more common than to use words in a figurative sense. Almost all compositions contain words, which, taken in their rigorous sense, would convey a meaning different from that which is obviously intended. It is essential to just construction, that many words which import something excessive, should be understood in a more mitigated sense--in that sense which common usage justifies. The word "necessary" is of this description. It has not a fixed character, peculiar to itself. It admits of all degrees of comparison; and is often connected with other words, which increase or diminish the impression the mind receives of the urgency it imports. A thing may be necessary, very necessary, absolutely or indispensably necessary. To no mind would the same idea be conveyed by these several phrases. The comment on the word is well illustrated by the passage cited at the bar, from the 10th section of the 1st article of the constitution. It is, we think, impossible to compare the sentence which prohibits a state from laying "imposts, or duties on imports or exports, except what may be absolutely necessary for executing its inspection laws," with that which authorizes congress "to make all laws which shall be necessary and proper for carrying into execution" the powers of the general government, without feeling a conviction, that the convention understood itself to change materially the meaning of the word "necessary," by prefixing the word "absolutely." This word, then, like others, is used in various senses; and, in its construction, the subject, the context, the intention of the person using them, are all to be taken into view.
Let this be done in the case under consideration. The subject is the execution of those great powers on which the welfare of a nation essentially depends. It must have been the intention of those who gave these powers, to insure, so far as human prudence could insure, their beneficial execution. This could not be done, by confiding the choice of means to such narrow limits as not to leave it in the power of congress to adopt any which might be appropriate, and which were conducive to the end. This provision is made in a constitution, intended to endure for ages to come, and consequently, to be adapted to the various crises of human affairs. To have prescribed the means by which government should, in all future time, execute its powers, would have been to change, entirely, the character of the instrument, and give it the properties of a legal code. It would have been an unwise attempt to provide, by immutable rules, for exigencies which, if foreseen at all, must have been seen dimly, and which can be best provided for as they occur. To have declared, that the best means shall not be used, but those alone, without which the power given would be nugatory, would have been to deprive the legislature of the capacity to avail itself of experience, to exercise its reason, and to accommodate its legislation to circumstances. If we apply this principle of construction to any of the powers of the government, we shall find it so pernicious in its operation that we shall be compelled to discard it. The powers vested in congress may certainly be carried into execution, without prescribing an oath of office. The power to exact this security for the faithful performance of duty, is not given, nor is it indispensably necessary. The different departments may be established; taxes may be imposed and collected; armies and navies may be raised and maintained; and money may be borrowed, without requiring an oath of office. It might be argued, with as much plausibility as other incidental powers have been assailed, that the convention was not unmindful of this subject. The oath which might be exacted--that of fidelity to the constitution--is prescribed, and no other can be required. Yet, he would be charged with insanity, who should contend, that the legislature might not superadd, to the oath directed by the constitution, such other oath of office as its wisdom might suggest.
So, with respect to the whole penal code of the United States: whence arises the power to punish, in cases not prescribed by the constitution? All admit, that the government may, legitimately, punish any violation of its laws; and yet, this is not among the enumerated powers of congress. The right to enforce the observance of law, by punishing its infraction, might be denied, with the more plausibility, because it is expressly given in some cases. Congress is empowered "to provide for the punishment of counterfeiting the securities and current coin of the United States," and "to define and punish piracies and felonies committed on the high seas, and offences against the law of nations." The several powers of congress may exist, in a very imperfect state, to be sure, but they may exist and be carried into execution, although no punishment should be inflicted, in cases where the right to punish is not expressly given.
Take, for example, the power "to establish post-offices and post-roads." This power is executed, by the single act of making the establishment. But, from this has been inferred the power and duty of carrying the mail along the post-road, from one post-office to another. And from this implied power, has again been inferred the right to punish those who steal letters from the post-office, or rob the mail. It may be said, with some plausibility, that the right to carry the mail, and to punish those who rob it, is not indispensably necessary to the establishment of a post-office and post-road. This right is indeed essential to the beneficial exercise of the power, but not indispensably necessary to its existence. So, of the punishment of the crimes of stealing or falsifying a record or process of a court of the United States, or of perjury in such court. To punish these offences, is certainly conducive to the due administration of justice. But courts may exist, and may decide the causes brought before them, though such crimes escape punishment.
The baneful influence of this narrow construction on all the operations of the government, and the absolute impracticability of maintaining it, without rendering the government incompetent to its great objects, might be illustrated by numerous examples drawn from the constitution, and from our laws. The good sense of the public has pronounced, without hesitation, that the power of punishment appertains to sovereignty, and may be exercised, whenever the sovereign has a right to act, as incidental to his constitutional powers. It is a means for carrying into execution all sovereign powers, and may be used, although not indispensably necessary. It is a right incidental to the power, and conducive to its beneficial exercise.
If this limited construction of the word "necessary" must be abandoned, in order to punish, whence is derived the rule which would reinstate it, when the government would carry its powers into execution, by means not vindictive in their nature? If the word "necessary" means "needful," "requisite," "essential," "conducive to," in order to let in the power of punishment for the infraction of law; why is it not equally comprehensive, when required to authorize the use of means which facilitate the execution of the powers of government, without the infliction of punishment? . . . [continued]
