"They say a little knowledge is a dangerous thing, but it's not one half so bad as a lot of ignorance"
About this Quote
The line works because it’s structured like a pub-room correction, a casual “ah, but” that smuggles in a moral hierarchy. “A little knowledge” is framed as a manageable risk, even a forgivable one. “A lot of ignorance,” by contrast, isn’t innocent; it’s scalable. It accumulates, spreads, recruits. Ignorance can be worn as identity, defended as tradition, mistaken for virtue. And once it’s plentiful enough, it stops feeling like ignorance at all - it becomes worldview.
That subtext is classic Pratchett: the comedy is the crowbar. Across Discworld, he treats belief as a force with physics, capable of building gods, mobs, and bureaucracies out of nothing but conviction. In that universe, ignorance isn’t just absence; it’s an active ingredient in cruelty, panic, and policy.
The intent isn’t to romanticize half-informed hot takes. It’s to reassign the danger label to where it belongs: to the self-protecting certainty that refuses to learn, then demands the world conform to it.
Quote Details
| Topic | Knowledge |
|---|---|
| Source | Help us find the source |
| Cite |
Citation Formats
APA Style (7th ed.)
Pratchett, Terry. (2026, January 14). They say a little knowledge is a dangerous thing, but it's not one half so bad as a lot of ignorance. FixQuotes. https://fixquotes.com/quotes/they-say-a-little-knowledge-is-a-dangerous-thing-12849/
Chicago Style
Pratchett, Terry. "They say a little knowledge is a dangerous thing, but it's not one half so bad as a lot of ignorance." FixQuotes. January 14, 2026. https://fixquotes.com/quotes/they-say-a-little-knowledge-is-a-dangerous-thing-12849/.
MLA Style (9th ed.)
"They say a little knowledge is a dangerous thing, but it's not one half so bad as a lot of ignorance." FixQuotes, 14 Jan. 2026, https://fixquotes.com/quotes/they-say-a-little-knowledge-is-a-dangerous-thing-12849/. Accessed 12 Feb. 2026.











