The principles of American constitutional law are the foundation of all judicial decisions, and it is
(as Marshall observes) "the province and duty of the Courts to say what the law is." Judicial
decisions, however, are technical, are handed down by experts, and set forth authoritatively as
results of experience which the junior student of the law is likely to find difficult, if not
incomprehensible. But to attempt merely to simplify the law, or its interpretation by the Cour ...