It is emphatically the province and duty of the judicial department to say what the law is...If two laws conflict with each other, the courts must decide on the operation of each...This is of the very essence of judicial duty.
John MarshallNo principle of general law is more universally acknowledged, than the perfect equality of nations. Russia and Geneva have equal rights. It results from this equality, that no one can rightfully impose a rule on another....As no nation can prescribe a rule for others, none can make a law of nations.
John MarshallWhat is it that makes us trust our judges? Their independence in office and manner of appointment.
John MarshallCertainly all those who have framed written constitutions contemplate them as forming the fundamental and paramount law of the nation, and consequently the theory of every such government must be, that an act of the legislature, repugnant to the constitution, is void.
John Marshall