- "If Tyranny and Oppression come to this land, it will be in the guise of fighting a foreign enemy."  (better source needed)
- "Religious bondage shackles and debilitates the mind and unfits it for every noble enterprise, every expanded prospect."  (better source needed)
- "In no instance have . . . the churches been guardians of the liberties of the people."
- "This would be the best of all possible worlds, if there were no religion in it!" -- this is taken badly out of context. The full quote is:
Twenty times, in the course of my late Reading, have I been upon the point of breaking out, "This would be the best of all possible Worlds, if there were no Religion in it"!!! But in this exclamati[on] I should have been as fanatical as Bryant or Cleverly [Adams' boyhood parish priest and Latin school master]. Without Religion this World would be Something not fit to be mentioned in polite Company, I mean Hell.