We have no more right to decline the exercise of jurisdiction which is given, than to usurp that which is not given. The one or the other would be tr… - John Marshall

The very essence of civil liberty certainly consists in the right of every individual to claim the protection of the laws whenever he receives an injury. One of the first duties of government is to afford that protection. In Great Britain, the King himself is sued in the respectful form of a petition, and he never fails to comply with the judgment of his court. In the third volume of his Commentaries, page 23, Blackstone states two cases in which a remedy is afforded by mere operation of law. "In all other cases," he says, "it is a general and indisputable rule that where there is a legal right, there is also a legal remedy by suit or action at law whenever that right is invaded." And afterwards, page 109 of the same volume, he says, "I am next to consider such injuries as are cognizable by the Courts of common law. And herein I shall for the present only remark that all possible injuries whatsoever that did not fall within the exclusive cognizance of either the ecclesiastical, military, or maritime tribunals are, for that very reason, within the cognizance of the common law courts of justice, for it is a settled and invariable principle in the laws of England that every right, when withheld, must have a remedy, and every injury its proper redress." The Government of the United States has been emphatically termed a government of laws, and not of men. It will certainly cease to deserve this high appellation if the laws furnish no remedy for the violation of a vested legal right.

It is emphatically the province and duty of the Judicial Department to say what the law is.

We must never forget that it is a constitution we are expounding.