Editor’s Note: Kim Foster’s TEDxSurrey talk explores why lasting change is so hard—and argues that the real issue isn’t your habits or willpower, but the identity you’re operating from. Drawing on her two decades as a family physician and her own reinvention story, she shows how updating your inner “operating system” and self-story makes new habits finally stick and feel freeing instead of forced.
Why Is Change So Hard?
KIM FOSTER: Why is it so hard to change? Honestly, I’ve spent the last 20 years asking that question. As a doctor, as a coach, and as a human being who once believed I just wasn’t the kind of person who could change.
You probably know the feeling. Maybe it was a New Year’s resolution or a milestone birthday, something that made you say, “That’s it, time to turn things around.”
So you downloaded a habit tracker, bought a blender, a yoga mat, and enough kale to alarm your family. And then, two weeks later, there you were, side-eyeing the blender like it betrayed you and pretending the habit tracker never existed. Back to the same patterns and the same routines.
My Own Struggle With Change
I’ve been there too, many times, with my health, my career, and my money. For a while, my credit card lived in the freezer, literally in a block of ice beside the frozen peas.
A solid plan, until the night I wanted a pair of boots badly enough to melt the ice around it with a hairdryer. I tried every budgeting trick, spreadsheets, envelopes, you name it. But nothing lasted. And I kept thinking, “I’m doing all the right things, why can’t I stick with this?”
That cycle of hope, effort, and defeat can leave you wondering, “What’s wrong with me?” But what if nothing is wrong with you?
Asking the Right Question
What if the reason change doesn’t last isn’t because you’re doing it wrong, but because you’re asking the wrong question?
We all want to change something. Lose weight, start a business, be more confident, get more sleep. And there’s no shortage of strategies. 5 a.m. routines, cold plunges, vision boards, bio hacks. But if knowing what to do were enough, we’d all be thriving by now. So why is it still so hard?
As a family doctor, I watched patients struggle, not with understanding what to do, but with actually doing it and staying consistent. So I started asking different questions, not “How do we build better habits?” but something deeper. What makes change stick? Why do some people succeed and others don’t, even when they’re trying just as hard?
The Power of Identity: What the Research Shows
And the more I looked, the more I started to see a pattern. And then I found a study that offered a fascinating clue.
In 2011, ahead of an election, a team of researchers from Stanford and Harvard asked one group, “How important is it to you to vote in the upcoming election?” They asked another group, “How important is it to you to be a voter in the upcoming election?” And in that study, that one tiny shift from doing to being made people significantly more likely to show up at the polls.
Why? Because one focused on action, the other focused on self-concept.
Once I saw that, I started seeing it everywhere. People who called themselves runners, they were still out there in February, long after the resolution crowd disappeared. People who’d said, “I’m trying to run more,” most of them were already back on the couch.
Identity: The Real Obstacle to Change
So I began to wonder, what if the real obstacle isn’t your habits or your willpower? What if it’s your identity? Not just what you do, but who you believe yourself to be.
When I look back, that’s exactly what was happening with my credit card in the freezer. I wasn’t just fighting a spending habit, I was defending an identity. I still saw myself as someone who’s bad with money. And every time I said that, I wasn’t describing the problem, I was reinforcing it. I had unknowingly written an instruction manual for myself. “Here’s who you are, here’s what you do.”
Because when we believe the story, we live the story. That’s what identity does. It tells your brain how to behave, even when you’re desperate to change the script. But when you change the who, you change the what.
Upgrading Your Operating System
Picture it this way. You download a fancy new app on your phone, but it keeps crashing, won’t load, glitches out. Turns out your phone’s operating system hasn’t been updated in years. That’s what it’s like when we try to fix our lives from the outside. New habits, new hacks, new goals, but underneath, the identity you’re running on, it’s still the old version.
It sounds like, “I’m not good at this. I never follow through. I always put others first.” That’s the outdated OS. And those shiny new habits crash, not because they were wrong, but because they weren’t supported by the system underneath.
Real change doesn’t last until you update the system, until you upgrade who you believe you are. Because here’s what I’ve seen again and again. Identity always wins.
When Behavior Aligns With Identity
And the research backs this up. For example, studies show that people who define themselves as non-smokers are consistently more successful at quitting than those who say, “I’m trying to quit.”
Why? Because when a behavior aligns with your identity, your actions naturally follow. But when it doesn’t align, when it challenges the person you’ve always believed yourself to be, that’s when change gets hard. Because we’re not just afraid of failing, we’re afraid of losing who we’ve always been.
And that’s the part that fascinates me. Even when a new habit is something that you genuinely want, if it’s not aligned with your current identity, your subconscious mind will resist it.