The instrument of this Union has been characterized by well-meaning, but one-idea minds, as a 'covenant with death, and an agreement with hell,' simply because it effected the union of free with slave States. This method of characterizing the Constitution of our country--as noble a document for its time and place as the world has ever seen--can well be excused, since it has no doubt been done in utter obliviousness of the importance of the principle of political unitization. The original consummation of this Union was a great step in political progress; it was an achievement of the master principle of political movement; and God wills that no part of the advantage then gained in the struggle of Destiny shall ever be given up! But while unity is thus exemplified in the history of our Government, the phenomenon of differentiation is also manifest. The functions of government have greatly multiplied since its first organization; the 'division of labor' process has been going on, and new departments and bureaus have been established. While I write, the expediency of another department, that of agriculture, is being agitated in Congress. The Department of the Interior has been quite recently created, and new bureaus in this department, and in others, are being created from time to time, by act of Congress, to meet new wants in the administration of our Government. And what is true in this respect of the General Government is, also, true of the State Governments; for there, too, do we find the development of new functions, and the creation of new official organs to execute the same.