These considerations seem fully to justify the presumption that the law of population above stated will continue to act with undiminished effect through at least the next half century, and that thousands of persons who have already arrived at maturity and are now exercising the rights of freemen will close their eyes on the spectacle of more than 100,000,000 of population embraced within the majestic proportions of the American Union. It is not merely as an interesting topic of speculation that I present these views for your consideration. They have important practical bearings upon all the political duties we are called upon to perform. Heretofore our system of government has worked on what may be termed a miniature scale in comparison with the development which it must thus assume within a future so near at hand as scarcely to be beyond the present of the existing generation. It is evident that a confederation so vast and so varied, both in numbers and in territorial extent, in habits and in interests, could only be kept in national cohesion by the strictest fidelity to the principles of the Constitution as understood by those who have adhered to the most restricted construction of the powers granted by the people and the States. Interpreted and applied according to those principles, the great compact adapts itself with healthy ease and freedom to an unlimited extension of that benign system of federative self-government of which it is our glorious and, I trust, immortal charter. Let us, then, with redoubled vigilance, be on our guard against yielding to the temptation of the exercise of doubtful powers, even under the pressure of the motives of conceded temporary advantage and apparent temporary expediency. The minimum of Federal government compatible with the maintenance of national unity and efficient action in our relations with the rest of the world should afford the rule and measure of construction of our powers under the general clauses of the Constitution. A spirit of strict deference to the sovereign rights and dignity of every State, rather than a disposition to subordinate the States into a provincial relation to the central authority, should characterize all our exercise of the respective powers temporarily vested in us as a sacred trust from the generous confidence of our constituents.