"Ideas which have been developed simultaneously or in immediate succession in the same mind mutually reproduce each other, and do this with greater ease in the direction of the original succession and with a certainty proportional to the frequency with which they were together"
About this Quote
The specific intent is methodological: pin association to time and frequency so it can be studied like any other regularity. This is late-19th-century psychology trying to prove it belongs in the lab, not the salon. Ebbinghaus famously tested memory on himself with nonsense syllables, stripping away meaning to see the bare scaffolding of recall. In that context, “original succession” isn’t poetic; it’s experimental design. Present A then B, and A becomes a cue for B more reliably than the reverse. That asymmetry anticipates what we now call priming and cue-dependent retrieval.
The subtext is slightly unnerving: if thought follows grooves, then “natural” opinions can be engineered by mere sequencing. It’s the skeleton key for habit formation, education, propaganda, and advertising - anywhere repetition and order can make an idea feel inevitable. Ebbinghaus isn’t moralizing about that power, but his cool certainty is its own provocation: what we experience as free-flowing thinking may just be yesterday’s order, replayed on command.
Quote Details
| Topic | Learning |
|---|---|
| Source | Hermann Ebbinghaus, Memory: A Contribution to Experimental Psychology, trans. H. A. Ruger & C. E. Bussenius, Teachers College, Columbia Univ., 1913 — contains Ebbinghaus' discussion of associative reproduction consistent with the quoted passage. |
| Cite |
Citation Formats
APA Style (7th ed.)
Ebbinghaus, Hermann. (2026, January 17). Ideas which have been developed simultaneously or in immediate succession in the same mind mutually reproduce each other, and do this with greater ease in the direction of the original succession and with a certainty proportional to the frequency with which they were together. FixQuotes. https://fixquotes.com/quotes/ideas-which-have-been-developed-simultaneously-or-75091/
Chicago Style
Ebbinghaus, Hermann. "Ideas which have been developed simultaneously or in immediate succession in the same mind mutually reproduce each other, and do this with greater ease in the direction of the original succession and with a certainty proportional to the frequency with which they were together." FixQuotes. January 17, 2026. https://fixquotes.com/quotes/ideas-which-have-been-developed-simultaneously-or-75091/.
MLA Style (9th ed.)
"Ideas which have been developed simultaneously or in immediate succession in the same mind mutually reproduce each other, and do this with greater ease in the direction of the original succession and with a certainty proportional to the frequency with which they were together." FixQuotes, 17 Jan. 2026, https://fixquotes.com/quotes/ideas-which-have-been-developed-simultaneously-or-75091/. Accessed 12 Feb. 2026.










