Wherever two or more persons are engaged in any common enterprise or pursuit, there is always danger of difference of opinion. If it be a public trust or office, in which they are clothed with equal dignity and authority, there is peculiar danger of personal emulation and even animosity.

Hamilton, Alexander. "No. I: Deliberation on a new constitution--Hamilton." The Federalist: A Commentary on the Constitution of the United States, edited by Robert Scigliano. The Modern Library, 2001.

Franklin, Benjamin. Quoted in "'A Republic if you can keep it': Elizabeth Willing Powwel, Benjamin Franklin, and the James McHenry Journal. Library of Congress. Posted 6 Jan. 2022, blogs.loc.gov/manuscripts.

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.