Be the tortoise! Stop running out of time like a hare. Start studying ‘slow and steady’ with regular intervals, and you will retain more information than you think.
Hermann Ebbinghaus
The meaning of the quote
Picture 2 students preparing for an exam. One studies until 3 a.m. the night before, rereading the same pages for hours. The other studies the same material for 20 minutes across several days and tests what they can remember each time.
The first student may spend longer at the desk in one sitting, but the second is using a principle Hermann Ebbinghaus helped uncover more than a century ago: we remember more when learning is spread across time instead of packed into one session.
That is the idea behind this quote. The hare tries to cover everything in one burst. The tortoise returns to the material again and again, giving the brain time to forget a little, retrieve it and strengthen the memory.
Ebbinghaus spent more than a year testing how memory works. He memorized thousands of meaningless syllables, waited different lengths of time and tested himself again. His experiments helped establish ideas now known as the forgetting curve and the spacing effect.
The important part is not simply repetition. It is repetition with time and retrieval in between. When you have to pull an answer from memory instead of immediately rereading it, the effort helps strengthen what you learned.
Research summarized in Make It Stick makes the same case: learning often becomes more durable when retrieval takes some effort.
The effect also shows up outside the laboratory. Medical students using the spaced-repetition app Anki performed better across several courses in a study of medical-school students. The lesson is simple: one long session can make material feel familiar, but familiarity is not the same as being able to remember it later.
“Slow and steady” therefore does not mean studying less seriously. It means replacing one marathon session with shorter sessions spread across time..
Try this
- Space your next study session.
Pick something you’re currently learning. Study it today, then schedule your next review for 2 days later instead of repeating everything immediately. - Test yourself before you reread.
When you return to the material, first write down or say what you can remember. Then check your notes and correct what you missed. - Repeat with longer gaps.
Review the material again a few days later. If you can still recall it, increase the time before the next review.
The goal isn’t to race through the material. It’s to return to it often enough that remembering becomes easier each time.
About the author
Hermann Ebbinghaus helped prove that memory could be studied experimentally at a time when many psychologists doubted it could be measured reliably.
After earning his doctorate in philosophy from the University of Bonn, Ebbinghaus became interested in applying experimental methods to memory. With no large research team or laboratory, he used himself as the subject.
To make his experiments more controlled, he created thousands of meaningless syllables such as “zuc,” “bok” and “lef.” Because the combinations had no familiar meaning, he could test memory without previous knowledge influencing the results. He memorized lists, waited different lengths of time and measured how much he could still recall.
His findings were published in 1885 in Über das Gedächtnis, later translated as Memory: A Contribution to Experimental Psychology. His work helped establish ideas now known as the forgetting curve and the spacing effect.
The exact tortoise-and-hare wording of this quote does not appear in Ebbinghaus’s published work. It is better understood as a modern summary of the learning principles his experiments helped establish.
Resources
- Hermann Ebbinghaus (Biography)
- Spacing effect (Overview)
- Memory: A Contribution to Experimental Psychology (Book, Hermann Ebbinghaus)
- Make It Stick: The Science of Successful Learning (Book, Peter C. Brown, Henry L. Roediger III and Mark A. McDaniel)
- A Cohort Study Assessing the Impact of Anki as a Spaced Repetition Tool on Academic Performance in Medical School (Research study)
- How spaced repetition and active recall work (Anki Manual)
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