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Success Quote by Hermann Ebbinghaus

"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

Ebbinghaus is describing the mind as less a gallery of isolated thoughts than a machine for reruns. Line up two ideas close together in time, repeat that pairing often enough, and you don’t just remember them; you build a one-way street between them. The phrasing is almost mechanical - “mutually reproduce,” “direction,” “certainty proportional” - and that’s the tell. He’s not writing about inspiration or character, but about a predictable system whose outputs can be measured, nudged, and, crucially, exploited.

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

TopicLearning
SourceHermann 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.
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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.

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Ebbinghaus: Law of Association and Forward Memory Bias
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About the Author

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Hermann Ebbinghaus (January 24, 1850 - February 26, 1909) was a Psychologist from Germany.

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