"The supreme law of the land"--thus the Constitution of the United States, in its sixth article, defines itself. In its fifth article, the same fundamental document provides that "Amendments," properly made, "shall be valid to all intents and purposes as part of this Constitution." This primary authority for the rule of the land is further affirmed to have been ordained and established by "the people of the United States." Here are three noteworthy features of this "law of the land:"--it is supreme; it is amendable; it arises from the people. This written standard of our national life, its amendability, and its primal origin in the people's will, were matters much in Lincoln's eye. Each separate one of these three features of our national civic life had reverent respect in Lincoln's mind, in all his conception and exercise of authority over other men. It was this "supreme law" that he swore in both inaugurations to "preserve, protect, and defend." An amendment to the Constitution, that was pending at the time of his first inaugural oath, he took unusual pains in that address to mention and approve. And it was to "the people," on both occasions of his inauguration as president, and at all other times of public and responsible address, that he paid supreme respect, in his most finished and earnest eloquence and appeal. Here was a threefold ultimate standard to which Lincoln always made final appeal--the original Constitution; its amenability to due revision; and the people's free and deliberate decree. This triangular base-line was for Lincoln's politics and jurisprudence and statesmanship the supreme and finished standard of last appeal. He deferred to it submissively, habitually, and with reverence. All this can be truly said. And yet all this does not say all the truth. Respectful as Lincoln was for all that he found thus fundamentally prescribed, and heedful as he was to indulge in no executive liberty inconsonant with those express decrees, he found his fortune as chief executive forcing him to move where all explicit regulations failed to specify the path. The Constitution does not include all details. It does not vouchsafe specific counsel for specific needs. Its guidance is as to principles. "No foresight can anticipate, nor any document of reasonable length contain, express provisions for all possible questions." This he declared in his first inaugural. Then he mentions three such unprescribed details:--the method of returning fugitive slaves; the power of Congress to prohibit; and the duty of Congress to protect slavery in the Territories. Touching those three civic interests, civic duties and civic standards were undirected and undefined. But even while he spoke, those three unsettled problems in the Nation's life were kindling the national pulse to an uncontrollable heat. Nothing less than civil war was certainly impending, over controversies touching which the sovereign standards of the civic life did not expressly speak.