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. [James Madison, 1803?
Nothwithstanding the general progress made within the two last centuries in favour of this branch of liberty, & the full establishment of it, in some parts of our Country, there remains in others a strong bias towards the old error, that without some sort of alliance or coalition between Gov' & Religion neither can be duly supported: Such indeed is the tendency to such a coalition, and such its corrupting influence on both the parties, that the danger cannot be too carefully guarded agst.. And in a Gov' of opinion, like ours, the only effectual guard must be found in the soundness and stability of the general opinion on the subject. Every new & successful example therefore of a perfect separation between ecclesiastical and civil matters, is of importance. And I have no doubt that every new example, will succeed, as every past one has done, in shewing that religion & Gov will both exist in greater purity, the less they are mixed together; [James Madison, Letter to Edward Livingston, July 10, 1822,
The Writings of James Madison,