"Zeal without knowledge is fire without light"
About this Quote
As a 17th-century English cleric writing in the shadow of religious conflict and civil war, Fuller isn’t offering a generic self-help maxim. He’s diagnosing a public pathology: fervor that treats certainty as a substitute for comprehension. In a culture where doctrinal disputes could cost livelihoods or lives, “zeal” wasn’t an aesthetic preference; it was a political accelerant. His warning targets the type of believer (and leader) who mistakes volume for virtue, passion for proof, and spiritual urgency for moral permission.
The subtext is disciplined and slightly suspicious of performance. Fuller values conviction, but only when it submits to learning, interpretation, and restraint. The line’s sting is that it refuses zeal its favorite alibi - good intentions. Heat doesn’t absolve you if you can’t see what you’re doing. In Fuller’s hands, ignorance isn’t innocence; it’s a hazard with a halo.
Quote Details
| Topic | Wisdom |
|---|---|
| Source | Help us find the source |
| Cite |
Citation Formats
APA Style (7th ed.)
Fuller, Thomas. (2026, January 14). Zeal without knowledge is fire without light. FixQuotes. https://fixquotes.com/quotes/zeal-without-knowledge-is-fire-without-light-36308/
Chicago Style
Fuller, Thomas. "Zeal without knowledge is fire without light." FixQuotes. January 14, 2026. https://fixquotes.com/quotes/zeal-without-knowledge-is-fire-without-light-36308/.
MLA Style (9th ed.)
"Zeal without knowledge is fire without light." FixQuotes, 14 Jan. 2026, https://fixquotes.com/quotes/zeal-without-knowledge-is-fire-without-light-36308/. Accessed 12 Feb. 2026.









