As long as the reason of man continues fallible, and he is at liberty to exercise it, different opinions will be formed. As long as the connection subsists between his reason and his self-love, his opinions and his passions will have a reciprocal influence on each other.
James Madison, Federalist No. 10, November 23, 1787
--James Madison, Memorial and Remonstrance against Religious Assessments
20 June 1785 Papers 8:298--304
--http://press-pubs.uchicago.edu/founders/documents/amendI_religions43.html