In 1890, William James dedicated the fourth chapter of The Principles of Psychology to habit. James was the founder of American pragmatist psychology and the first person to teach a psychology course in the United States. His central claim in that chapter was precise: habits are not merely what we do repeatedly. They are what we become. “Habit is thus the enormous flywheel of society,” he wrote, “its most precious conservative agent.” The flywheel stores energy and releases it gradually, keeping a system moving long after the initial force has stopped. The habit, in James’s model, keeps a person moving in a chosen direction after motivation has gone — which it always does, and faster than expected. He had a second observation, sharper than the first: “There is no more miserable human being than one in whom nothing is habitual but indecision.”

Portrait of William James, American philosopher and psychologist, c. 1890
William James, c. 1890. The chapter on habit in The Principles of Psychology was not self-help. It was a structural argument: that the reliable actions of a person determine who that person becomes. Public domain via Wikimedia Commons.

He was describing the structure of mind. He was also, without knowing it, describing what happens to most people who try to start a journaling practice.

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B.J. Fogg spent two decades at Stanford’s Behavior Design Lab studying why behaviour change fails. After coaching more than 60,000 people, he arrived at a conclusion that ran against most of the advice in the genre: the obstacle is scale. People set targets too large, fail on the first hard day, and abandon the practice entirely. They interpret the failure as personal weakness. The design was wrong, not the person.

His solution was to make the target so small that failing requires a deliberate act of refusal. The canonical example from Tiny Habits (2019): after you sit down to brush your teeth, do one push-up. One. Because one is so close to zero that refusing it is harder than doing it. And once you have done one, on most days you will do more. The commitment is to one. The floor is always clearable.

Fogg calls the technique anchoring — attaching the new tiny behaviour to an existing daily event, so the new habit borrows the reliability of the old one. The trigger already happens. The habit rides it. Two lines in a notebook every day fits Fogg’s model precisely: small enough to survive the worst days, which is the only kind of survival that matters.

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In 2007, a young comedian named Brad Isaac described in a Lifehacker interview an encounter he said he had with Jerry Seinfeld at a comedy club. Seinfeld told him to get a large wall calendar and draw a red X on every day he wrote a joke. “After a few days you’ll have a chain. Just keep at it and the chain will grow longer every day. Your only job is to not break the chain.” Seinfeld has since said publicly he does not recall the conversation and has not claimed the method. Isaac’s account spread regardless, because the underlying observation is right: the visual continuity of a streak becomes its own momentum, independent of whoever first named it.

The writing is fifteen seconds. What it changes takes longer to measure.

The value in two daily lines is not in any single entry. Thirty days of two lines is sixty sentences about what you have been thinking and noticing and doing. In a year, that is 730 sentences — more than most people produce in deliberate reflection across a lifetime of good intentions about journaling. More than that: the daily act of opening the notebook keeps the habit of observation sharp. You begin looking at the world slightly differently when you know you will have to write two lines about it. You notice more. You hold observations slightly longer before they dissolve. The writing is fifteen seconds. What it changes takes longer to measure.

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Same time each day, if that helps — after the first coffee, last thing before bed, on the commute. The when matters less than the consistent when. Anchor it to something that already happens reliably and the new habit borrows the old one’s momentum. James’s flywheel, beginning to turn.

On good days, two lines becomes ten. On hard days, it stays at two. On the hardest days, one. The practice does not care about quality or quantity. It cares only that the notebook was opened, and that tomorrow it will be opened again.

Everything else follows from that.

References

  • James, W. (1890). The Principles of Psychology. Henry Holt. Chapter 4: Habit.
  • Fogg, B.J. (2019). Tiny Habits: The Small Changes That Change Everything. Houghton Mifflin Harcourt.
  • Isaac, B. (2007). Interview with Gina Trapani. Lifehacker. [Source of the “don’t break the chain” account. Seinfeld has publicly stated he does not recall the exchange and has not claimed the method.]