What can be done? It is the courts that can do most to cure the evil; and the opportunity is a very great one. Let them resolutely adhere to first principles. Let them consider how narrow is the function which the constitutions have conferred on them,--the office merely of deciding litigated cases; how large, therefore, is the duty intrusted to others, and above all to the legislature. It is that body which is charged, primarily, with the duty of judging of the constitutionality of its work. The constitutions generally give them no authority to call upon a court for advice; they must decide for themselves, and the courts may never be able to say a word. Such a body, charged, in every State, with almost all the legislative power of the people, is entitled to the most entire and real respect; is entitled, as among all rationally permissible opinions as to what the constitution allows, to its own choice. Courts, as has often been said, are not to think of the legislators, but of the legislature,--the great, continuous body itself, abstracted from all the transitory individuals who may happen to hold its power. It is this majestic representative of the people whose action is in question, a coördinate department of the government, charged with the greatest functions, and invested, in contemplation of law, with whatsoever wisdom, virtue, and knowledge the exercise of such functions requires. To set aside the acts of such a body, representing in its own field, which is the very highest of all, the ultimate sovereign, should be a solemn, unusual, and painful act. Something is wrong when it can ever be other than that. And if it be true that the holders of legislative power are careless or evil, yet the constitutional duty of the court remains untouched; it cannot rightly attempt to protect the people, by undertaking a function not its own. On the other hand, by adhering rigidly to its own duty, the court will help, as nothing else can, to fix the spot where responsibility lies, and to bring down on that precise locality the thunderbolt of popular condemnation. The judiciary, to-day, in dealing with the acts of their coördinate legislators, owe to the country no greater or clearer duty than that of keeping their hands off these acts wherever it is possible to do it. For that course--the true course of judicial duty always--will powerfully help to bring the people and their representatives to a sense of their own responsibility. There will still remain to the judiciary an ample field for the determinations of this remarkable jurisdiction, of which our American law has so much reason to be proud; a jurisdiction which has had some of its chief illustrations and its greatest triumphs, as in Marshall’s time, so in ours, while the courts were refusing to exercise it. CHAPTER VI LETTERS OF MARSHALL