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Who really said it

Question with boldness even the existence of a God; because, if there be one, he must more approve the homage of reason, than that of blindfolded fear

Written by Thomas Jefferson 1743–1826 · principal author of the Declaration of Independence & 3rd U.S. president
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From Jefferson’s letter of advice to his nephew Peter Carr, written from Paris on 10 August 1787. The wording is confirmed against the manuscript transcription on Monticello’s Jefferson Quotes & Family Letters ↗ (cited to Papers of Thomas Jefferson 12:14–19).

Last verified 10 Jul 2026 · how we verify · spot an error?

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“Question with boldness even the existence of a God; because, if there be one, he must more approve the homage of reason, than that of blindfolded fear” Thomas Jefferson, letter to Peter Carr, Paris, 10 August 1787

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Provenance

The source

Author
Thomas Jefferson (1743–1826)
Work
Letter to Peter Carr (with enclosure)
Written
Paris, 10 August 1787
First published
Jefferson’s papers, 19th c.; standard ed. Papers of Thomas Jefferson 12:14–19

Fix reason firmly in her seat, and call to her tribunal every fact, every opinion. Question with boldness even the existence of a god; because, if there be one, he must more approve the homage of reason, than that of blindfolded fear.

Jefferson’s manuscript uses lowercase “god” and the reading “approve the homage”; some later transcriptions modernize the capital and insert “of.”

Monticello: Extract from Jefferson to Peter Carr, 10 Aug. 1787

How we know

Public domain

Jefferson wrote this letter in 1787 and it entered the public record through his published papers in the 19th century — far earlier than the 1931 U.S. copyright threshold. The text is in the public domain.

Context

Why it mattered

Jefferson wrote from Paris to his teenage nephew, Peter Carr, laying out a full course of study. The section on religion is the letter’s most quoted: rather than warn Carr away from doubt, Jefferson tells him to interrogate every claim — even God’s existence — at “the tribunal” of reason.

The line has since become a banner for Enlightenment rationalism and church–state separation, and it is genuinely Jefferson’s own words rather than a later paraphrase.

Fix reason firmly in her seat, and call to her tribunal every fact, every opinion.

Explore

Filed under

More provenance-checked quotes on the same theme, each with its reuse status.

Doubt Courage

Go further

Dig deeper

Trusted places to keep pulling the thread — primary archives, fact-checks, and scholarship. We show how we used each one before you leave.

Founders Online: Jefferson to Peter Carr, 10 Aug. 1787founders.archives.gov

National Archives transcription of the complete letter and enclosure.
Monticello: Extract from Jefferson to Peter Carrtjrs.monticello.org

Jefferson research authority — manuscript transcription with PTJ citation.
Encyclopedia Virginia: Letter to Peter Carr (1787)encyclopediavirginia.org

Annotated primary-document presentation of the letter.
Letters of Thomas Jefferson: To Peter Carr, Aug. 10, 1787let.rug.nl

Full letter text hosting the “Fix reason firmly in her seat” passage.
WIST Quotations: Jefferson, Letter to Peter Carrwist.info

Sourced quotation record tying the line to the 10 Aug 1787 letter.

The author

About Thomas Jefferson

Thomas Jefferson

1743–1826 · Author of the Declaration of Independence & 3rd U.S. president

Thomas Jefferson drafted the Declaration of Independence, served as first U.S. Secretary of State and third president, and founded the University of Virginia. Writing from Paris in 1787, he sent his young nephew Peter Carr a celebrated letter of study advice whose religion section urged reason over inherited fear. The passage became a touchstone of his reputation as an Enlightenment rationalist.

For writers & researchers

Cite this

Primary source — Chicago

Thomas Jefferson to Peter Carr, Paris, 10 August 1787, in The Papers of Thomas Jefferson, ed. Julian P. Boyd (Princeton, N.J.: Princeton University Press), 12:14–19.

MLA (9th ed.)

Jefferson, Thomas. Letter to Peter Carr, 10 Aug. 1787. The Papers of Thomas Jefferson, edited by Julian P. Boyd, vol. 12, Princeton University Press, pp. 14–19.

APA (7th ed.)

Jefferson, T. (1950). Letter to Peter Carr, August 10, 1787. In J. P. Boyd (Ed.), The papers of Thomas Jefferson (Vol. 12, pp. 14–19). Princeton University Press. (Original work written 1787)

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Quotle.info. “Who really said ‘Question with boldness even the existence of a God; because, if there be one, he must more approve the homage of reason, than that of blindfolded fear’?” Last verified 10 Jul 2026. https://quotle.info/who-said/question-with-boldness-even-the-existence-of-a-god-because

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