George Washington quotes
...the path of true piety is so plain as to require but little political direction. To this consideration we ought to ascribe the absence of any regulation respecting religion from the Magna Charta of our country. To the guidance of the Ministers of the Gospel, this important object is, perhaps, more properly committed. It will be your care to instruct the ignorant, and to reclaim the devious: And in the progress of morality and science, to which our Government will give every furtherance, we may confidently expect the advancement of true religion, and the completion of our happiness.
Letter to the leaders of the Presbyterian Church, in Massachusetts Centinel, December 5, 1789, quoted in 1 Church and State in the United States, at 536-37 (Anson Phelps Stokes 1950). Responding to clergy complaints that the Constitution lacked mention of Jesus Christ.