"I have sworn upon the altar of God, eternal hostility against every form of tyranny over the mind of man"
About this Quote
The key move is that last clause. He’s not talking about kings, taxes, or standing armies. He’s talking about control of thought, the soft power that makes hard power durable. “Every form of tyranny” broadens the target beyond obvious despots to subtler coercions: state churches, censorship, compelled orthodoxy, cultural intimidation. Jefferson knew a new nation could throw off Britain and still reproduce its habits of deference through schools, pulpits, and law.
The context sharpens the edge. This line comes from an 1800 letter to Benjamin Rush, in the midst of fierce partisan conflict and the recent memory of the Alien and Sedition Acts, when criticism of the government could be treated as criminal. Jefferson’s hostility is aimed at the idea that public order requires managed beliefs.
There’s subtext, too: Jefferson frames liberty as an interior right before it’s a civic one. If the mind can be governed, ballots become theater. If the mind stays free, even flawed institutions face a citizenry that can still think its way out.
Quote Details
| Topic | Freedom |
|---|---|
| Source | Verified source: Thomas Jefferson to Benjamin Rush, 23 September 1800 (Thomas Jefferson, 1800)
Evidence: for I have sworn upon the altar of god eternal hostility against every form of tyranny over the mind of man. (The Papers of Thomas Jefferson, vol. 32 (2005), pp. 166–169 (quote appears within this letter; Monticello notes PTJ 32:168).). This is a line from Jefferson’s letter written at Monticello on September 23, 1800 to Dr. Benjamin Rush. The commonly circulated version often adds a comma after “God” and capitalizes “God,” but the Founders Online transcription (from the authoritative Papers of Thomas Jefferson edition) shows the wording above. Founders Online’s citation states the underlying print source as: The Papers of Thomas Jefferson, vol. 32, 1 June 1800–16 February 1801, ed. Barbara B. Oberg (Princeton: Princeton University Press, 2005), pp. 166–169. Monticello’s Jefferson encyclopedia entry likewise attributes it to this same letter and points to PTJ 32:168. See also Monticello’s extracted letter/quote page for the same text. Other candidates (1) The Writings of Thomas Jefferson (Thomas Jefferson, 1896) compilation95.3% Thomas Jefferson Paul Leicester Ford. vices rendered the colony . Perhaps , too , a name when given , should be ... I... |
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Citation Formats
APA Style (7th ed.)
Jefferson, Thomas. (2026, February 21). I have sworn upon the altar of God, eternal hostility against every form of tyranny over the mind of man. FixQuotes. https://fixquotes.com/quotes/i-have-sworn-upon-the-altar-of-god-eternal-83491/
Chicago Style
Jefferson, Thomas. "I have sworn upon the altar of God, eternal hostility against every form of tyranny over the mind of man." FixQuotes. February 21, 2026. https://fixquotes.com/quotes/i-have-sworn-upon-the-altar-of-god-eternal-83491/.
MLA Style (9th ed.)
"I have sworn upon the altar of God, eternal hostility against every form of tyranny over the mind of man." FixQuotes, 21 Feb. 2026, https://fixquotes.com/quotes/i-have-sworn-upon-the-altar-of-god-eternal-83491/. Accessed 2 Mar. 2026.










