We are in no danger from violations of the Constitution by which encroachments are made upon the personal rights of the citizen. The sentence of condemnation long since pronounced by the American people upon acts of that character will, I doubt not, continue to prove as salutary in its effects as it is irreversible in its nature. But against the dangers of unconstitutional acts which, instead of menacing the vengeance of offended authority, proffer local advantages and bring in their train the patronage of the Government, we are, I fear, not so safe. To suppose that because our Government has been instituted for the benefit of the people it must therefore have the power to do whatever may seem to conduce to the public good is an error into which even honest minds are too apt to fall. In yielding themselves to this fallacy they overlook the great considerations in which the Federal Constitution was founded. They forget that in consequence of the conceded diversities in the interest and condition of the different States it was foreseen at the period of its adoption that although a particular measure of the Government might be beneficial and proper in one State it might be the reverse in another; that it was for this reason the States would not consent to make a grant to the Federal Government of the general and usual powers of government, but of such only as were specifically enumerated, and the probable effects of which they could, as they thought, safely anticipate; and they forget also the paramount obligation upon all to abide by the compact then so solemnly and, as it was hoped, so firmly established. In addition to the dangers to the Constitution springing from the sources I have stated, there has been one which was perhaps greater than all. I allude to the materials which this subject has afforded for sinister appeals to selfish feelings, and the opinion heretofore so extensively entertained of its adaptation to the purposes of personal ambition. With such stimulants it is not surprising that the acts and pretensions of the Federal Government in this behalf should sometimes have been carried to an alarming extent. The questions which have arisen upon this subject have related-- First. To the power of making internal improvements within the limits of a State, with the right of territorial jurisdiction, sufficient at least for their preservation and use. Second. To the right of appropriating money in aid of such works when carried on by a State or by a company in virtue of State authority, surrendering the claim of jurisdiction; and Third. To the propriety of appropriation for improvements of a particular class, viz, for light-houses, beacons, buoys, public piers, and for the removal of sand bars, sawyers, and other temporary and partial impediments in our navigable rivers and harbors.