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.
Notes from Wikiquote
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 - LOC transcription | 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".