You change, then slide back to the old you. I dig into the research on why, with takeaways for your life, and use films and the Hero's Journey as a lens.
Joined October 2026
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Why does change so often snap back?
I post the science of identity, made easy. One bite-sized insight a day, with a takeaway for your life.
Who I am, and the one idea behind all of it:
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A small way to try this: pick the step you'd be willing to do badly this week. Not the plan, not the right answer, just a version that's allowed to be partly wrong. The gaps tend to show up once you're moving.
Questions are answered as you move, not before you move. Moving forward with an answer that is partially correct will usually fill in the gaps faster than waiting until you come up with a plan that is perfectly correct.
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In 1948, Robert Merton imagined a bank that was solvent at breakfast and empty by dinner.
A rumour said it was failing. Enough people believed it to empty their accounts. By afternoon it was true.
A false belief, acted on, made itself true. It often runs inside one person too.
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Your senses take in millions of bits of information a second. Around forty reach your attention.
Something is choosing the forty. Attention research points at what you're already looking for.
Fine for spotting your new car everywhere. Less fine when the evidence is about you.
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I quit cola a dozen times. Once for three months. Always came back.
Then one afternoon I walked past a vending machine and a quiet thought arrived: that's not me anymore. Haven't had one since.
I hadn't decided anything. Something underneath shifted. I went looking for what.
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Chakrabarti et al. (NBER, 2026) found lower-income lottery winners spent more of a windfall, while higher-income winners saved more and worked less. For identity, where the money goes often follows who you already are with it.
What lottery winners reveal about how different income groups spend, save, and work: By linking lottery records to credit reports and tax returns, economists tracked where every dollar of a financial windfall goes. Low-income winners prioritized spending, while… dlvr.it/TWH01G
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A 1948 paper named a pattern most of us still live:
A belief, acted on, tends to produce the results it predicted.
Merton called it the self-fulfilling prophecy.
What it doesn't mean: thoughts alone create reality. Action is part of the loop.
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Research on why people often return to the same level already exists.
What's often missing is the translation: what the papers actually show, what they don't, and what that means for how you change.
No hype. Just the pattern, in plain English.
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Willpower explains why you try.
It doesn't explain why you keep ending up back at the same level.
Something else is often running underneath — a setting that tends to pull results back to what still feels like "you."
Effort isn't the problem. The setting often is.
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A habit isn't really done when the days run out.
It's done when it stops feeling like something you're trying and starts feeling like something you do.
That's an identity shift, and it often takes its own time.
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For years I'd start something, take a few small steps, then slip back.
I took that as evidence. Not for me.
Turns out slipping is often part of the middle, not the end.
Years down this road now, I still slip sometimes. I just know how it works: a slip isn't a verdict.
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Stop asking "how long until it’s a habit?"
Ask "how do I make this easier to repeat?"
Simpler behaviours and a steady cue (same time, same place) tend to get you there sooner. That part you control.
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You don't have to feel optimistic before you make something. Sometimes making something small gives that optimism somewhere to start.
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3 things the habit research shows, 1 it doesn't:
1. It often takes longer than 21 days. About 66 was typical.
2. A missed day usually doesn't reset you.
3. Doing it in the same place or moment tends to help it stick.
What it doesn't show: one number that fits everyone.
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"21 days to form a habit."
What the study found (Lally et al., 2009, 96 people, 12 weeks):
• About 66 days was typical
• Range: 18 to 254 days (top end projected)
• Missing one day didn't derail it
• Simpler habits tended to get automatic faster
21 was never the number.
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Day 22 and the new habit still feels like work?
That's not failure. It's often just what the middle looks like.
The "21 days" idea can make us quit right when it's starting to count.
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The model I use: the Identity Thermostat.
A heater can warm a room past 68°, but if the thermostat still says 68, the room gets pulled back.
Who you believe you are works like that setting. Climb above it and you tend to drift back down.
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