I take the official oath to-day with no mental reservations, and with no purpose to construe the Constitution or laws by any hypercritical rules; and while I do not choose now to specify particular acts of Congress as proper to be enforced, I do suggest that it will be much safer for all, both in official and private stations, to conform to and abide by all those acts which stand unrepealed, than to violate any of them, trusting to find impunity in having them held to be unconstitutional. It is seventy-two years since the first inauguration of a President under our National Constitution. During that period, fifteen different and very distinguished citizens have in succession administered the executive branch of the Government. They have conducted it through many perils, and generally with great success. Yet, with all this scope for precedent, I now enter upon the same task, for the brief constitutional term of four years, under great and peculiar difficulties. A disruption of the Federal Union, heretofore only menaced, is now formidably attempted. I hold that in the contemplation of universal law and of the Constitution, the union of these States is perpetual. Perpetuity is implied, if not expressed, in the fundamental law of all national governments. It is safe to assert that no government proper ever had a provision in its organic law for its own termination. Continue to execute all the express provisions of our National Constitution, and the Union will endure forever, it being impossible to destroy it, except by some action not provided for in the instrument itself. Again, if the United States be not a government proper, but an association of States in the nature of a contract merely, can it, as a contract, be peaceably unmade by less than all the parties who made it? One party to a contract may violate it--break it, so to speak; but does it not require all to lawfully rescind it? Descending from these general principles, we find the proposition that in legal contemplation the Union is perpetual, confirmed by the history of the Union itself. The Union is much older than the Constitution. It was formed, in fact, by the Articles of Association in 1774. It was matured and continued in the Declaration of Independence in 1776. It was further matured, and the faith of all the then thirteen States expressly plighted and engaged that it should be perpetual, by the Articles of the Confederation, in 1778; and finally, in 1787, one of the declared objects for ordaining and establishing the Constitution was to form a more perfect Union. But if the destruction of the Union by one or by a part only of the States be lawfully possible, the Union is less perfect than before, the Constitution having lost the vital element of perpetuity.