“Religion in America takes no direct part in the government of society, but it must be regarded as the foremost of the political institutions of that country; for if it does not impart a taste for freedom, it facilitates the use of it. Indeed, it is in this same point of view that the inhabitants of the United States themselves look upon religious belief.
“I do not know whether all Americans have a sincere faith in their religion—for who can search the human heart?—but I am certain that they hold it to be indispensable to the maintenance of republican institutions. This opinion is not peculiar to a class of citizens or a party, but it belongs to the whole nation and to every rank of society.
“In the United States, the sovereign authority is religious...there is no country in the world where the Christian religion retains a greater influence over the souls of men than in America, and there can be no greater proof of its utility and of its conformity to human nature than that its influence is powerfully felt over the most enlightened and free nation of the earth.”
(Alexis de Tocqueville, Democracy in America, 1830.)