Physically speaking, we cannot separate. We cannot remove our respective sections from each other, nor build an impassable wall between them. A husband and wife may be divorced, and go out of the presence and beyond the reach of each other; but the different parts of our country cannot do this. They cannot but remain face to face, and intercourse, either amicable or hostile, must continue between them. It is impossible, then, to make that intercourse more advantageous or more satisfactory after separation than before. Can aliens make treaties easier than friends can make laws? Can treaties be more faithfully enforced between aliens than laws can among friends? Suppose you go to war, you cannot fight always, and when after much loss on both sides and no gain on either you cease fighting, the identical old questions as to terms of intercourse are again upon you. This country, with its institutions, belongs to the people who inhabit it. Whenever they shall grow weary of the existing government they can exercise their constitutional right of amending it, or their revolutionary right to dismember or overthrow it. I cannot be ignorant of the fact that many worthy and patriotic citizens are desirous of having the National Constitution amended. * * * I understand a proposed amendment to the Constitution--which amendment, however, I have not seen--has passed Congress, to the effect that the Federal Government shall never interfere with the domestic institutions of the States, including that of persons held to service. To avoid misconstruction of what I have said, I depart from my purpose not to speak of particular amendments, so far as to say that, holding such a provision now to be implied constitutional law, I have no objections to its being made express and irrevocable.'