Our people have been satisfied with the interposition of the courts to defend their Constitutions from executive or legislative attack, because these Constitutions stand for something in which they thoroughly believe. President Hadley has well said that "a written Constitution serves much the same purpose in public law which a fence serves in the definition and protection of private rights to real estate. A fence does not make a boundary; it marks one. If it is set where a boundary line has previously existed by tradition and agreement, it forms an exceedingly convenient means of defending it against encroachments. If it is set near the boundary and allowed to stay there unchallenged, it may in time become itself the accepted boundary. But if the attempt is made to establish a factitious boundary by the mere act of setting up a fence the effort fails."[Footnote: Freedom and Responsibility, 30.] Americans took principles and institutions with which they had become familiar in colonial days and made their Constitutions out of them. Their attachment to what the Constitution provides goes behind the Constitution to the rock of ancient custom and precedent on which it rests, the common heritage of all the States. There is an obvious reason for the unwillingness of the judiciary to exercise the power under consideration unless in case of necessity. The legislature presumably does only what the public sentiment of the day justifies or demands. One branch of it, at least, is the direct representative of the people. To defeat the operation of a statute is therefore always presumably an unpopular thing to do, and if in any case there is known to be truth behind the presumption, it requires, as the Federalist [Footnote: No. LXXVIII.] put it, "an uncommon portion of fortitude in the judges to do their duty as faithful guardians of the constitution." It is seldom that an inferior court declares a statute void. The mere fact that it was enacted by the legislature imports the opinion of that body that it was within its powers; and such an opinion of a department of government is entitled to great respect. If a different, opinion is to prevail, it should ordinarily be first pronounced by the highest authority that can speak for the judicial department. So far, however, as the question of power or jurisdiction is concerned, a justice of the peace, in trying a five-dollar case, has the same authority to disregard a statute, whether it be one enacted by the State legislature or by Congress, if he deems it unconstitutional, which belongs to the full bench of the Supreme Court of the United States. If he is wrong, the only remedy is by appeal.