The North, in an unrestrained intercourse with the South, protected by the equal laws of a common government, finds in the productions of the latter great additional resources of maritime and commercial enterprise and precious materials of manufacturing industry.  The South, in the same intercourse, benefiting by the same agency of the North, sees its agriculture grow and its commerce expand.  Turning partly into its own channels the seamen of the North, it finds its particular navigation invigorated; and while it contributes in different ways to nourish and increase the general mass of the national navigation, it looks forward to the protection of a maritime strength to which itself is unequally adapted.  The East, in a like intercourse with the West, already finds, and in the progressive improvement of interior communications by land and water will more and more find, a valuable vent for the commodities which it brings from abroad or manufactures at home.  The West derives from the East supplies requisite to its growth and comfort, and what is perhaps of still greater consequence, it must of necessity owe the secure enjoyment of indispensable outlets for its own productions to the weight, influence, and the future maritime strength of the Atlantic side of the Union, directed by an indissoluble community of interest as one nation.  Any other tenure by which the West can hold this essential advantage, whether derived from its own separate strength or from an apostate and unnatural connection with any foreign power, must be intrinsically precarious.

While, then, every part of our country thus feels an immediate and particular interest in union, all the parts combined can not fail to find in the united mass of means and efforts greater strength, greater resource, proportionably greater security from external danger, a less frequent interruption of their peace by foreign nations, and what is of inestimable value, they must derive from union an exemption from those broils and wars between themselves which so frequently afflict neighboring countries not tied together by the same governments, which their own rivalships alone would be sufficient to produce, but which opposite foreign alliances, attachments, and intrigues would stimulate and imbitter.  Hence, likewise, they will avoid the necessity of those overgrown military establishments which, under any form of government, are inauspicious to liberty, and which are to be regarded as particularly hostile to republican liberty.  In this sense it is that your union ought to be considered as a main prop of your liberty, and that the love of the one ought to endear to you the preservation of the other.