Mr. Chief Justice MARSHALL delivered the opinion of the Court, and, after stating the case, proceeded as follows:

The appellant contends that this decree is erroneous because the laws which purport to give the exclusive privilege it sustains are repugnant to the Constitution and laws of the United States.

They are said to be repugnant:

1st. To that clause in the Constitution which authorizes Congress to regulate commerce.

2d. To that which authorizes Congress to promote the progress of science and useful arts.

The State of New York maintains the Constitutionality of these laws, and their Legislature, their Council of Revision, and their Judges, have repeatedly concurred in this opinion. It is supported by great names -- by names which have all the titles to consideration that virtue, intelligence, and office can bestow. No tribunal can approach the decision of this question without feeling a just and real respect for that opinion which is sustained by such authority, but it is the province of this Court, while it respects, not to bow to it implicitly, and the Judges must exercise, in the examination of the subject, that understanding which Providence has bestowed upon them, with that independence which the people of the United [p187] States expect from this department of the government.

As preliminary to the very able discussions of the Constitution which we have heard from the bar, and as having some influence on its construction, reference has been made to the political situation of these States anterior to its formation. It has been said that they were sovereign, were completely independent, and were connected with each other only by a league. This is true. But, when these allied sovereigns converted their league into a government, when they converted their Congress of Ambassadors, deputed to deliberate on their common concerns and to recommend measures of general utility, into a Legislature, empowered to enact laws on the most interesting subjects, the whole character in which the States appear underwent a change, the extent of which must be determined by a fair consideration of the instrument by which that change was effected.

This instrument contains an enumeration of powers expressly granted by the people to their government. It has been said that these powers ought to be construed strictly. But why ought they to be so construed? Is there one sentence in the Constitution which gives countenance to this rule? In the last of the enumerated powers, that which grants expressly the means for carrying all others into execution, Congress is authorized "to make all laws which shall be necessary and proper" for the purpose. But this limitation on the means which may be used is not extended to the powers which are conferred, nor is there one sentence in [p188] the Constitution which has been pointed out by the gentlemen of the bar or which we have been able to discern that prescribes this rule. We do not, therefore, think ourselves justified in adopting it. What do gentlemen mean by a "strict construction?" If they contend only against that enlarged construction, which would extend words beyond their natural and obvious import, we might question the application of the term, but should not controvert the principle. If they contend for that narrow construction which, in support or some theory not to be found in the Constitution, would deny to the government those powers which the words of the grant, as usually understood, import, and which are consistent with the general views and objects of the instrument; for that narrow construction which would cripple the government and render it unequal to the object for which it is declared to be instituted, and to which the powers given, as fairly understood, render it competent; then we cannot perceive the propriety of this strict construction, nor adopt it as the rule by which the Constitution is to be expounded. As men whose intentions require no concealment