“The highest, the transcendent glory of the American Revolution was this — it connected, in one indissoluble bond, the principles of civil government with the precepts of Christianity.”
Letter to an autograph collector (identified: "Washington, 27th April, 1837"), published in The Historical Magazine 4:7 (July 1860), pp. 193-194 https://archive.org/stream/historicalmagaziv4morr#page/194/mode/1up; this became slightly misquoted by John Wingate Thornton in The Pulpit of The American Revolution (1860): "The highest glory of the American Revolution, said John Quincy Adams, was this: it connected, in one indissoluble bond, the principles of civil government with the principles of Christianity".
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John Quincy Adams 52
American politician, 6th president of the United States (in… 1767–1848Related quotes

Private notes, quoted in Gertrude Himmelfarb, Lord Acton: A Study in Conscience and Politics (1952), p. 72
Undated

“Our Nation, A Product of Christianity,” Springfield Republican, 1884, editorial.
1880s

As quoted in The Great Quotations on Religious Freedom (1991) edited by Albert J. Menendez and Edd Doerr

“All revolutions are doctrinal — such as the French one, or the one that introduced Christianity.”
The Napoleon of Notting Hill (1904)
The Napoleon of Notting Hill (1904)

1810s, What do we mean by the American Revolution? (1818)
Context: The American Revolution was not a common event. Its effects and consequences have already been awful over a great part of the globe. And when and where are they to cease?
But what do we mean by the American Revolution? Do we mean the American war? The Revolution was effected before the war commenced. The Revolution was in the minds and hearts of the people; a change in their religious sentiments of their duties and obligations. … This radical change in the principles, opinions, sentiments, and affections of the people, was the real American Revolution.

http://www.paulglover.org/9103.html (Ithaca Times, letter to editor), March 1991
Context: “War fans spit on the principles of the American Revolution when they charge obediently wherever their president points our flag. Many flag-wavers know little about the U. S. Constitution, but can explain soap operas and football in detail.”