1	Federalist 78 Alexander Hamilton Whoever attentively considers the different departments of power must perceive, that, in a government in which they are separated from each other, the judiciary, from the nature of its functions, will always be the least dangerous to the political rights of the Constitution; because it will be least in a capacity to annoy or injure them. The Executive not only dispenses the honors, but holds the sword of the community. The legislature not only commands the purse, but prescribes the rules by which the duties and rights of every citizen are to be regulated.
2	Judicial Power The judiciary, on the contrary, has no influence over either the sword or the purse; no direction either of the strength or of the wealth of the society; and can take no active resolution whatever. It may truly be said to have neither FORCE nor WILL, but merely judgment; and must ultimately depend upon the aid of the executive arm even for the efficacy of its judgments.
3	Judiciary Must be Independent I agree, that "there is no liberty, if the power of judging be not separated from the legislative and executive powers.“ And it proves, in the last place, that as liberty can have nothing to fear from the judiciary alone, but would have every thing to fear from its union with either of the other departments; that as all the effects of such a union must ensue from a dependence of the former on the latter, notwithstanding a nominal and apparent separation;
4	Independence of Judiciary Indispensable that as, from the natural feebleness of the judiciary, it is in continual jeopardy of being overpowered, awed, or influenced by its co-ordinate branches; and that as nothing can contribute so much to its firmness and independence as permanency in office, this quality may therefore be justly regarded as an indispensable ingredient in its constitution, and, in a great measure, as the citadel of the public justice and the public security.
5	Limited Constitution Requires Independent Courts The complete independence of the courts of justice is peculiarly essential in a limited Constitution. By a limited Constitution, I understand one which contains certain specified exceptions to the legislative authority; such, for instance, as that it shall pass no bills of attainder, no ex post facto laws, and the like. Limitations of this kind can be preserved in practice no other way than through the medium of courts of justice, whose duty it must be to declare all acts contrary to the manifest tenor of the Constitution void. Without this, all the reservations of particular rights or privileges would amount to nothing.
6	Judicial Review Some perplexity respecting the rights of the courts to pronounce legislative acts void, because contrary to the Constitution, has arisen from an imagination that the doctrine would imply a superiority of the judiciary to the legislative power. It is urged that the authority which can declare the acts of another void, must necessarily be superior to the one whose acts may be declared void
7	Constitution is the Supreme Law There is no position which depends on clearer principles, than that every act of a delegated authority, contrary to the tenor of the commission under which it is exercised, is void. No legislative act, therefore, contrary to the Constitution, can be valid. To deny this, would be to affirm, that the deputy is greater than his principal; that the servant is above his master; that the representatives of the people are superior to the people themselves; that men acting by virtue of powers, may do not only what their powers do not authorize, but what they forbid.
8	Judging Constitutionality If it be said that the legislative body are themselves the constitutional judges of their own powers [as Jefferson argued when he became President], and that the construction they put upon them is conclusive upon the other departments, it may be answered, that this cannot be the natural presumption, where it is not to be collected from any particular provisions in the Constitution. It is not otherwise to be supposed, that the Constitution could intend to enable the representatives of the people to substitute their will to that of their constituents. It is far more rational to suppose, that the courts were designed to be an intermediate body between the people and the legislature, in order, among other things, to keep the latter within the limits assigned to their authority.
9	The Judiciary Alone Interprets the Law The interpretation of the laws is the proper and peculiar province of the courts. A constitution is, in fact, and must be regarded by the judges, as a fundamental law. It therefore belongs to them to ascertain its meaning, as well as the meaning of any particular act proceeding from the legislative body. If there should happen to be an irreconcilable variance between the two, that which has the superior obligation and validity ought, of course, to be preferred; or, in other words, the Constitution ought to be preferred to the statute, the intention of the people to the intention of their agents.
10	The Constitution, Not the Judicial Power, is Supreme Nor does this conclusion by any means suppose a superiority of the judicial to the legislative power. It only supposes that the power of the people is superior to both; and that where the will of the legislature, declared in its statutes, stands in opposition to that of the people, declared in the Constitution, the judges ought to be governed by the latter rather than the former. They ought to regulate their decisions by the fundamental laws, rather than by those which are not fundamental.
11	Courts Exercise Judgment, Not Will It can be of no weight to say that the courts, on the pretense of a repugnancy, may substitute their own pleasure to the constitutional intentions of the legislature. This might as well happen in the case of two contradictory statutes; or it might as well happen in every adjudication upon any single statute. The courts must declare the sense of the law; and if they should be disposed to exercise WILL instead of JUDGMENT, the consequence would equally be the substitution of their pleasure to that of the legislative body.
12	Need for Permanent Tenure of Judges The observation, if it prove any thing, would prove that there ought to be no judges distinct from that body. If, then, the courts of justice are to be considered as the bulwarks of a limited Constitution against legislative encroachments, this consideration will afford a strong argument for the permanent tenure of judicial offices, since nothing will contribute so much as this to that independent spirit in the judges which must be essential to the faithful performance of so arduous a duty
13	Judicial Independence Guards Constitutional Rights This independence of the judges is equally requisite to guard the Constitution and the rights of individuals from the effects of those ill humors, which the arts of designing men, or the influence of particular conjunctures, sometimes disseminate among the people themselves, and which, though they speedily give place to better information, and more deliberate reflection, have a tendency, in the meantime, to occasion dangerous innovations in the government, and serious oppressions of the minor party in the community.
14	Independent Judiciary Guards Against Unjust and Partial Laws But it is not with a view to infractions of the Constitution only, that the independence of the judges may be an essential safeguard against the effects of occasional ill humors in the society. These sometimes extend no farther than to the injury of the private rights of particular classes of citizens, by unjust and partial laws.
15	Dr. Bonham's Case 8 Co. Rep. 107a, 114a C.P. 1610 Lord Chief Justice Sir Edward Coke: And it appears in our books, that in many cases, the common law will controul acts of parliament, and sometimes adjudge them to be utterly void: for when an act of parliament is against common right and reason, or repugnant, or impossible to be performed, the common law will controul it, and adjudge such act to be void;
16	Existence of Independent Judiciary Mitigates Unjust Laws Here also the firmness of the judicial magistracy is of vast importance in mitigating the severity and confining the operation of such laws. It not only serves to moderate the immediate mischiefs of those which may have been passed, but it operates as a check upon the legislative body in passing them; who, perceiving that obstacles to the success of iniquitous intention are to be expected from the scruples of the courts, are in a manner compelled, by the very motives of the injustice they meditate, to qualify their attempts.
17	Courts Bound by Precedents There is yet a further and a weightier reason for the permanency of the judicial offices, which is deducible from the nature of the qualifications they require. It has been frequently remarked, with great propriety, that a voluminous code of laws is one of the inconveniences necessarily connected with the advantages of a free government. To avoid an arbitrary discretion in the courts, it is indispensable that they should be bound down by strict rules and precedents, which serve to define and point out their duty in every particular case that comes before them
18	Judges Must be Skilled and Honest the records of those precedents must unavoidably swell to a very considerable bulk, and must demand long and laborious study to acquire a competent knowledge of them. Hence it is, that there can be but few men in the society who will have sufficient skill in the laws to qualify them for the stations of judges. And making the proper deductions for the ordinary depravity of human nature, the number must be still smaller of those who unite the requisite integrity with the requisite knowledge.
19	Permanent Tenure Will Attract Qualified Judges a temporary duration in office, which would naturally discourage such characters from quitting a lucrative line of practice to accept a seat on the bench, would have a tendency to throw the administration of justice into hands less able, and less well qualified, to conduct it with utility and dignity. In the present circumstances of this country, and in those in which it is likely to be for a long time to come, the disadvantages on this score would be greater than they may at first sight appear; but it must be confessed, that they are far inferior to those which present themselves under the other aspects of the subject.