It may be a reflection on human nature, that such devices should be necessary to control the abuses of government. But what is government itself, but the greatest of all reflections on human nature? If men were angels, no government would be necessary.
Authentication Score 2
Original Citation
Madison, James [published as Publius]. "Federalist No. 51, The Structure of the Government Must Furnish the Proper Checks and Balances Between the Different Departments." New York Packet, 8 Feb. 1788.
Current Citation
Madison, James. "No. 51: How to maintain: make the parts check each other. Also, a federal system divides power further.--Madison (or Hamilton)." The Federalist: A Commentary on the Constitution of the United States, edited by Robert Scigliano. The Modern Library, 2001.