From Our First Right: Religious Liberty | Public Discourse:

At the heart of the American model of public life is an essentially religious vision of man, government, and God. This model has given us a free, open, and non-sectarian society marked by an astonishing variety of cultural and religious expressions. But our system’s success does not result from the procedural mechanisms our Founders put in place. Our system works precisely because of the moral assumptions that undergird it. And those moral assumptions have a religious grounding.