“There are those in America today who have come to depend absolutely on government for their security. And when government fails they seek to rectify that failure in the form of granting government more power. So, as government has failed to control crime and violence with the means given it by the Constitution, they seek to give it more power at the expense of the Constitution. But in doing so, in their willingness to give up their arms in the name of safety, they are really giving up their protection from what has always been the chief source of despotism — government. Lord Acton said power corrupts. Surely then, if this is true, the more power we give the government the more corrupt it will become. And if we give it the power to confiscate our arms we also give up the ultimate means to combat that corrupt power. In doing so we can only assure that we will eventually be totally subject to it. When dictators come to power, the first thing they do is take away the people's weapons. It makes it so much easier for the secret police to operate, it makes it so much easier to force the will of the ruler upon the ruled.”

Letter to W.T. Barry http://press-pubs.uchicago.edu/founders/documents/v1ch18s35.html (4 August 1822), in The Writings of James Madison (1910) edited by Gaillard Hunt, Vol. 9, p. 103; these words, using the older spelling "Governours", are inscribed to the left of the main entrance, Library of Congress James Madison Memorial Building.
1820s
Context: A popular Government without popular information, or the means of acquiring it, is but a Prologue to a Farce or a Tragedy, or perhaps both. Knowledge will forever govern ignorance: And a people who mean to be their own Governors, must arm themselves with the power which knowledge gives.

Speech to the Empire Parliamentary Association's Conference in Westminster Hall (4 July 1935); published in This Torch of Freedom: Speeches and Addresses (1935), p. 5
1935
Context: It is often said to-day by detractors of democracy, at home and particularly abroad, that the parliamentary system has failed. After all, this is the only country... where parliamentary government has grown up, the only country in which it is traditional and hereditary, where it is flesh of our flesh and bone of our bone. Whatever failures may have come to parliamentary government in countries which have not those traditions, and where it is not a natural growth, that is no proof that parliamentary government has failed.

Letter to the Editor, in The New York Times (1971)

Letter to W.T. Barry http://press-pubs.uchicago.edu/founders/documents/v1ch18s35.html (4 August 1822), in The Writings of James Madison (1910) edited by Gaillard Hunt, Vol. 9, p. 103; these words, using the older spelling "Governours", are inscribed to the left of the main entrance, Library of Congress James Madison Memorial Building.
1820s

17 U.S. (4 Wheaton) 316, 424
McCulloch v. Maryland (1819)
Context: [.. ] it can scarcely be necessary to say that the existence of State banks can have no possible influence on the question. No trace is to be found in the Constitution of an intention to create a dependence of the Government of the Union on those of the States, for the execution of the great powers assigned to it. Its means are adequate to its ends, and on those means alone was it expected to rely for the accomplishment of its ends. To impose on it the necessity of resorting to means which it cannot control, which another Government may furnish or withhold, would render its course precarious, the result of its measures uncertain, and create a dependence on other Governments which might disappoint its most important designs, and is incompatible with the language of the Constitution. But were it otherwise, the choice of means implies a right to choose a national bank in preference to State banks, and Congress alone can make the election. After the most deliberate consideration, it is the unanimous and decided opinion of this Court that the act to incorporate the Bank of the United States is a law made in pursuance of the Constitution, and is a part of the supreme law of the land.

1920s, Ordered Liberty and World Peace (1924)

The Ballot or the Bullet (1964), Speech in Cleveland, Ohio (April 3, 1964)
Context: You and I in America are faced not with a segregationist conspiracy, we’re faced with a government conspiracy. Everyone who’s filibustering is a senator—that’s the government. Everyone who’s finagling in Washington, D. C., is a congressman—that’s the government. You don’t have anybody putting blocks in your path but people who are a part of the government. The same government that you go abroad to fight for and die for is the government that is in a conspiracy to deprive you of your voting rights, deprive you of your economic opportunities, deprive you of decent housing, deprive you of decent education. You don’t need to go to the employer alone, it is the government itself, the government of America, that is responsible for the oppression and exploitation and degradation of black people in this country. And you should drop it in their lap. This government has failed the Negro. This so-called democracy has failed the Negro. And all these white liberals have definitely failed the Negro.

"We are Power" speech (1980)

Letter to John Taylor (26 November 1798), shortened in The Money Masters to "I wish it were possible to obtain a single amendment to our Constitution … taking from the federal government their power of borrowing".
Posthumous publications, On financial matters