If men were angels, no government would be necessary. If angels were to govern men, neither external nor internal controls on government would be necessary. In framing a government which is to be administered by men over men, the great difficulty lies in this: you must first enable the government to control the governed; and in the next place oblige it to control itself. A dependence on the people is, no doubt, the primary control on the government; but experience has taught mankind the necessity of auxiliary precautions.
Thomas Paine, Alexander Hamilton, James Madison, John Jay (2017). “The Origin of the Nation: Declaration of Independence, Constitution, Bill of Rights and Other Amendments, Federalist Papers & Common Sense: Creating America - Landmark Documents that Shaped a New Nation”, p.308, Madison & Adams Press