Fascinating Smithsonian article on Roger Williams: hard-headed puritan, founder of Providence, and promoter of secular government.
Williams described the true church as a magnificent garden, unsullied and pure, resonant of Eden. The world he described as “the Wilderness,” a word with personal resonance for him. Then he used for the first time a phrase he would use again, a phrase that although not commonly attributed to him has echoed through American history. “[W]hen they have opened a gap in the hedge or wall of Separation between the Garden of the Church and the Wildernes of the world,” he warned, “God hathe ever broke down the wall it selfe, removed the Candlestick, &c. and made his Garden a Wildernesse.” ... “It is the will and command of God that, since the coming of his Sonne the Lord Jesus, a permission of the most Paganish, Jewish, Turkish, or Antichristian consciences and worships, bee granted to all men in all Nations and Countries.”