James Madison (March 16, 1751 - June 28, 1836)
According to Wikipedia, Madison was "an American politician and fourth President of the United States of America (1809-1817), was one of the most influential Founding Fathers of the United States. Considered to be the 'Father of the Constitution', Madison played a bigger role in designing the 1787 document more than anyone else. In 1788, he wrote over a third of the Federalist Papers, still the most influential commentary on the Constitution. As a leader in the first Congresses, he drafted many basic laws and was responsible for the first ten amendments to the Constitution, and thus is also known as the 'Father of the Bill of Rights'. As a political theorist, Madison's most distinctive belief was that the new republic needed checks and balances to limit the powers of special interests, which Madison called factions. He believed very strongly that the new nation should fight against aristocracy and corruption (especially of British origin), and was deeply committed to creating mechanisms that would ensure Republicanism in the United States."
Some Madison quotes:
"Democracy does not need the church, or the clergy."
"A just government, instituted to perpetuate liberty, does not need the clergy."
"That diabolical, hell-conceived principle of persecution rages among some, and to their eternal infamy the clergy can furnish their quota of imps for such a business."
"What influence, in fact, have ecclesiastical establishments had on society? In some instances they have been seen to erect a spiritual tyranny on the ruins of the civil authority; in many instances they have been seen upholding the thrones of political tyranny; in no instance have they been the guardians of the liberties of the people. Rulers who wish to subvert the public liberty may have found an established clergy convenient allies."
"During almost fifteen centuries has the legal establishment of Christianity been on trial. What has been its fruits? More or less, in all places, pride and indolence in the clergy; ignorance and servility in the laity; in both, superstition, bigotry and persecution."
"I must admit moreover that it may not be easy, in every possible case, to trace the line of separation between the rights of religion and the Civil authority with such distinctness as to avoid collisions and doubts on unessential points. The tendency of a usurpation on one side or the other, or to a corrupting coalition or alliance between them, will be best guarded by an entire abstinence of the Government from interference in any way whatever, beyond the necessity of preserving public order, and protecting each sect against trespass on its legal rights by others."
"The civil government ... functions with complete success ... by the total separation of the Church from the State."
"Religion flourishes in greater purity without than with the aid of government."
"And I have no doubt that every new example will succeed, as every past one has done, in shewing that religion & Govt will both exist in greater purity, the less they are mixed together."
"Who does not see that the same authority, which can establish Christianity, in exclusion of all other religions, may establish with the same ease any particular sect of Christians, in exclusion of all other sects? That the same authority which can force a citizen to contribute three pence only of his property for the support of any one establishment, may force him to conform to any other establishment in all cases whatsoever."
"The purpose of separation of church and state is to keep forever from these shores the ceaseless strife that has soaked the soil of Europe in blood for centuries."
"This freedom arises from that multiplicity of sects, which pervades America, and which is the best and only security for religious liberty in any society. For where there is such a variety of sects, there cannot be a majority of any one sect to oppress and persecute the rest."
"Strongly guarded as is the separation between Religion and Government in the Constitution of the United States, the danger of encroachment by Ecclesiastical Bodies, may be illustrated by precedents already furnished in their short history."