"The constant flux and caprice of mental events do not admit of the establishment of stable experimental conditions"
About this Quote
The line’s intent is methodological humility with a strategic edge. Ebbinghaus isn’t conceding defeat; he’s staking out the hard problem that makes psychology necessary. By framing mental life as unstable, he legitimizes the field’s distinctive tools: controlled but imperfect experiments, statistical regularities rather than mechanical laws, and designs that respect noise instead of pretending it away. The subtext is also a subtle rebuke to introspection-heavy philosophy: if inner life is this mercurial, then armchair certainty is a fantasy, and measurement becomes the only honest discipline.
Context matters: late 19th-century psychology is desperate to be taken seriously as science. Ebbinghaus, famous for timing his own memory and charting the forgetting curve, knows how fragile “stable conditions” are when the subject carries the apparatus inside his skull. The quote lands as a thesis for modern cognitive science’s uneasy bargain: we can quantify the mind, but only by admitting how much it wriggles out of our grasp.
Quote Details
| Topic | Learning |
|---|---|
| Source | Help us find the source |
| Cite |
Citation Formats
APA Style (7th ed.)
Ebbinghaus, Hermann. (2026, January 17). The constant flux and caprice of mental events do not admit of the establishment of stable experimental conditions. FixQuotes. https://fixquotes.com/quotes/the-constant-flux-and-caprice-of-mental-events-do-77943/
Chicago Style
Ebbinghaus, Hermann. "The constant flux and caprice of mental events do not admit of the establishment of stable experimental conditions." FixQuotes. January 17, 2026. https://fixquotes.com/quotes/the-constant-flux-and-caprice-of-mental-events-do-77943/.
MLA Style (9th ed.)
"The constant flux and caprice of mental events do not admit of the establishment of stable experimental conditions." FixQuotes, 17 Jan. 2026, https://fixquotes.com/quotes/the-constant-flux-and-caprice-of-mental-events-do-77943/. Accessed 10 Feb. 2026.




