We admit, as all must admit, that the powers of the Government are limited, and that its limits are not to be transcended. But we think the sound con… - John Marshall

If the States may tax one instrument, employed by the Government in the execution of its powers, they may tax any and every other instrument. They may tax the mail; they may tax the mint; they may tax patent rights; they may tax the papers of the custom house; they may tax judicial process; they may tax all the means employed by the Government to an excess which would defeat all the ends of Government. This was not intended by the American people. They did not design to make their Government dependent on the States. [...] If the controlling power of the States be established, if their supremacy as to taxation be acknowledged, what is to restrain their exercising control in any shape they may please to give it? Their sovereignty is not confined to taxation; that is not the only mode in which it might be displayed. The question is, in truth, a question of supremacy, and if the right of the States to tax the means employed by the General Government be conceded, the declaration that the Constitution and the laws made in pursuance thereof shall be the supreme law of the land is empty and unmeaning declamation.

The acme of judicial distinction means the ability to look a lawyer straight in the eyes for two hours and not hear a damned word he says.

[T]he Government of the Union, though limited in its powers, is supreme within its sphere of action. This would seem to result necessarily from its nature. It is the Government of all; its powers are delegated by all; it represents all, and acts for all. Though any one State may be willing to control its operations, no State is willing to allow others to control them. The nation, on those subjects on which it can act, must necessarily bind its component parts. But this question is not left to mere reason; the people have, in express terms, decided it by saying, [p406] "this Constitution, and the laws of the United States, which shall be made in pursuance thereof," "shall be the supreme law of the land," and by requiring that the members of the State legislatures and the officers of the executive and judicial departments of the States shall take the oath of fidelity to it. The Government of the United States, then, though limited in its powers, is supreme, and its laws, when made in pursuance of the Constitution, form the supreme law of the land, "anything in the Constitution or laws of any State to the contrary notwithstanding."