
On members of the clergy who sought to establish some form of "official" Christianity in the U.S. government. Letter to Dr. Benjamin Rush (23 September 1800)
This has commonly been quoted as "I have sworn upon the altar of God Eternal, hostility against every form of tyranny over the mind of man", "I have sworn upon the altar of God eternal hostility against every form of tyranny over the mind of man", and "I have sworn upon the altar of God, eternal hostility against every form of tyranny over the mind of man." Neither capitalization of "god" and "eternal", nor a comma before or after "eternal" are apparent in the original. Photograph of the original manuscript at the Library of Congress http://memory.loc.gov/master/mss/mtj/mtj1/022/0400/0440.jpg - LOC transcription http://memory.loc.gov/cgi-bin/query/r?ammem/mtj:@field(DOCID+@lit(tj090069)) <!-- NOTE : though this transcription has a comma between god and eternal in there is no comma apparent in the photograph and where grammar might best place it remains ambiguous. -->
The first portion of this statement has also been widely paraphrased as "The clergy believe that any power confided in me will be exerted in opposition to their schemes, and they believe rightly".
1800s
Context: The returning good sense of our country threatens abortion to their hopes, & they believe that any portion of power confided to me, will be exerted in opposition to their schemes. And they believe rightly; for I have sworn upon the altar of god eternal hostility against every form of tyranny over the mind of man. But this is all they have to fear from me: and enough, too, in their opinion.