"One must verify or expel his doubts, and convert them into the certainty of Yes or NO"
About this Quote
The line works because it frames belief as labor. “Convert” suggests an industrial process: raw, messy hesitation goes in; hard output comes out. Carlyle’s Yes/NO reads like a binary switch, not a spectrum. Subtextually, he’s warning against the fashionable skepticism of his age - the kind that lounges in ironic detachment while politics, industry, and faith are being remade at speed. For Carlyle, to remain uncertain is to be complicit in drift.
Context matters: he’s writing in a 19th-century Britain rattled by revolutions abroad, mechanization at home, and weakening religious consensus. Carlyle’s broader project was to rescue meaning through earnest conviction and “heroic” leadership; doubt, to him, is the doorway to moral paralysis and social disorder. The sting is that he makes certainty sound like hygiene: clean up your mind, take a position, and stop leaking anxiety into the world. It’s persuasive rhetoric - and a little dangerous - because it flatters decisiveness while sidestepping the possibility that some truths deserve a long, uncomfortable maybe.
Quote Details
| Topic | Decision-Making |
|---|---|
| Source | Help us find the source |
| Cite |
Citation Formats
APA Style (7th ed.)
Carlyle, Thomas. (2026, January 17). One must verify or expel his doubts, and convert them into the certainty of Yes or NO. FixQuotes. https://fixquotes.com/quotes/one-must-verify-or-expel-his-doubts-and-convert-33078/
Chicago Style
Carlyle, Thomas. "One must verify or expel his doubts, and convert them into the certainty of Yes or NO." FixQuotes. January 17, 2026. https://fixquotes.com/quotes/one-must-verify-or-expel-his-doubts-and-convert-33078/.
MLA Style (9th ed.)
"One must verify or expel his doubts, and convert them into the certainty of Yes or NO." FixQuotes, 17 Jan. 2026, https://fixquotes.com/quotes/one-must-verify-or-expel-his-doubts-and-convert-33078/. Accessed 13 Feb. 2026.














