A wheel that stops is just a disk. Only a rolling wheel is a wheel. For you, who keep preparing and never start, standing still in the flood of AI tools.
Do you remember the scariest moment when you were learning to ride a bicycle as a child?
It was the moment of starting. That instant when you press the pedal from a standstill, balance refuses to come. The handlebars shake, your body tilts, and the moment your father's hand lets go from behind, a terror rushes in as if the world is collapsing. You feel you'll fall, your heart races, your legs go weak — but then, once the wheel starts rolling, something strange happens. The more the wheel turns, the more stable it becomes. The faster it goes, the better the balance holds. That feeling of "I'm about to fall" transforms, at some point, into the thrill of cutting through wind.
Physics calls this the gyroscopic effect. A spinning object stabilizes itself. A spinning top doesn't topple. A rolling wheel doesn't tip sideways. The very thing that looked unstable becomes stable once it starts to rotate — and more stable the faster it spins. Inside this simple law of physics is one of the most important truths about life.
Standing still, you fall. Rolling, you steady.
Starting a business works this way. Making art works this way. Learning works this way. In the end, life itself works this way.
The person who wants to start only after everything is perfectly prepared will stand at the starting line forever. The day preparation ends never arrives. The world changes, tools change, markets change, and yesterday's perfect preparation becomes today's obsolete knowledge. So they prepare again, study again, delay departure again — and meanwhile, someone else builds a shabby little wheel and just starts rolling it. It squeaks, it wobbles, it looks like it could fall any second, but it rolls. And while rolling, they learn. While rolling, they fix. While rolling, they become a better wheel. A year later, the person at the starting line is still preparing, and the person with the shabby wheel is already far down the road.
I wrote a book called DTDT before this one. It was a book about the compass of life. Dream, Theory, Design, Tool — a compass for what to do, in the order of dreaming, theorizing, designing, and finding tools. But once you take that compass and actually start walking, you discover another problem. There are too many tools.
The age of AI brought a flood of tools. Something new pours out every day. What you learned yesterday is useless today. People drown in tools and fail to make the thing they actually wanted to make. They spend all their time learning tools, and when the tools change, the thought of starting from scratch again exhausts them. They know the direction, but don't know which tool to use. They pick a tool, and a better one appears. Mid-learning, something newer comes out. So in the end, I've watched many people let time pass without making a single thing.
That's why I wrote this book. If DTDT was the compass for "what to do," this is the compass for "how to make it." A compass for tools. A compass that keeps you from getting lost among the countless AI tools. A compass that doesn't tremble even when tools change. A compass that trains the eye to handle any tool you meet on your own.
There are two kinds of books in the world. One teaches how to use a specific tool. The other teaches the principles that run through all tools. The first disappears when its tool disappears. The second stays valid even if the tools change a hundred times. I want this to be the second kind. It won't discuss button locations or menu structures. Those change tomorrow and become completely different next month. What this book deals with is a deeper layer — the layer that doesn't change when tools change. The layer of principle.
I teach Business Creation at graduate school. The word creation may feel strange. Does business go together with creation? Isn't it usually called "entrepreneurship"? "Startups"? You might wonder — but the degree my students receive is called Master of Business Creation. If MBA is Master of Business Administration, MBC is not Administration but Creation. Not management, but making.
I believe this difference matters. Management handles what already exists. Creation brings what doesn't yet exist into being. MBA teaches you to run existing organizations efficiently; MBC teaches you to put into the world what the world has never seen. Becoming a manager and becoming a creator are two completely different kinds of work. The capabilities required are different. The ways of thinking are different. The ways of seeing the world are different. And I teach the latter.
Business is creation. Just as an artist stands before a canvas and makes what wasn't there, the founder stands before a market and makes what wasn't there. Just as a musician places notes on a staff, the founder places value on the world. The materials and tools differ, but the essence is the same. Taking what's inside of you and bringing it outside — that is creation, and that is business. AI tools are the brush, the paint, the canvas that help this creation. Just as a painter must understand how a brush works to paint freely, the business creator must understand how tools work to build freely.
But if I look back at how we've lived, we've lived our whole lives inside the rules tools set for us. We learned what tools demanded. We prepared what tools required. We could only express what tools permitted. To use Photoshop, you had to learn Photoshop's language first. You had to know what a layer is, what a mask is, what a blending mode is. Only after mastering the tool's grammar could you begin to express what you wanted. Even if a sharp image lived in your head, if you couldn't translate it into the tool's language, it couldn't become real.
Coding was worse. You had to know what a variable is, what a function is, what loops and conditionals and objects and classes are. Only after becoming fluent in the language of the computer were you granted permission to make something. That took six months, a year, sometimes years. During all that long time, we didn't make; we only learned. We only prepared. And by the time we'd gotten somewhat good at a tool, a new tool appeared. A new language. A new framework. Learn again. Prepare again. It never ended.
We lost our time to make while learning the grammar of tools. And what's more painful — in that process, we forgot what we wanted to express in the first place.
We lost our time to make while learning the grammar of tools.
On the first day of every semester, I ask my students the same question. "What is it that you actually want to do?"
At first, they can't answer. They fidget. They look startled, as if the question came in a foreign language. I understand. They've heard "what you should do" their entire lives. "What you want to do" was rarely asked. From elementary school on, there was always a list of things to do, but people who asked what they wanted to do were rare, and even when asked, it wasn't taken seriously. "Later." "Now is the time to study." "You'll understand when you grow up." That's what we learned. That wanting is for later. That doing the required thing comes first. The problem is, the day the required things end never comes.
So they need time. It's okay not to answer the first question right away. If you wait and sit in the silence, it comes out, little by little.
One student said, "I want to turn people's memories into food." There was a dish her grandmother used to make, and she wants to taste it again, but she doesn't know the recipe, and she thinks there must be many people like her, and she wants to make a service that brings back flavors from blurred memory. Another student said, "I want to record grandmothers' stories on video." Her grandmother passed away, and she can't remember her voice. The face remains in photos, but the voice is gone. She regrets it deeply. She wants to spare other people from that same regret.
When stories like these come out, the room changes. Eyes brighten. Voices gain weight. They look like different people than they did moments ago. And almost without exception, the next sentence comes: "But... can I actually make money with that?"
In the past, you needed to target a million people for a business to work. You had to persuade the masses. Market size had to be in the hundreds of billions of won for investors to notice. So instead of a unique personal idea, you had to chase an already-validated market. How big could "a grandmother-video service" be? Investors wouldn't care.
But now it's different. Kevin Kelly proposed the "1,000 True Fans" theory — that if you have a thousand people who genuinely love you, you can make a living from creation. AI made that theory real. It doesn't even have to be a thousand. A hundred will do. A hundred people with a very specific problem. A hundred people who share your exact concern.
I asked the student who wanted to record grandmothers' stories, "Who would pay?" She answered, "Grandchildren who want to keep their grandmother's voice before she passes. People like me." You only need to find a hundred. A hundred people paying 30,000 won a month is 3 million won a month. Run solo, that's enough to live on. And in this market, this student is number one. Because she means it. Because it was her desperate problem. No big company will enter this market. The market is too small. So it's actually safe.
And with AI, the grammar of creation itself has changed. In the past, to make something, you had to first learn the language of the tool. You had to speak in the computer's language. You had to adjust to the computer. Now it's different. The AI understands what you say. You can speak in Korean. You can describe what you want in your own language. The tool adjusts to you now, not the other way around.
This isn't a matter of convenience — it's a shift of power. In the past, power belonged to those who could handle tools. Only those who could code, or design, or possessed technical skill could create. Now, power belongs to those who have a thought. Those who know what they want to make. Those who know what problem they want to solve. Those who know the direction. The skill of handling a tool — AI can do that for you. What you want to make — AI cannot do that for you. Only you know that.
AI can replace the skill of handling tools. AI cannot replace knowing what you want to make. Only you know that.
In this book, I propose a framework. Its name is SPIN.
Imagine a wheel. At first it's heavy. There's no momentum. You have to push it hard just to get it moving. It squeaks, it veers, it goes a bit and stops. The first step is Shape — giving form. The planning step. You take the blurry idea drifting in your head and give it a shape. You talk with AI, make your thinking concrete, and move from "what is this?" to "this is it!" Once the wheel has a shape, now you can roll it.
The second step is Produce — making. The build step. You turn the plan into something real. Shabby is fine. Imperfect is fine. As long as it turns. The moment you roll the first revolution is the heaviest. You have to push. It squeaks. It veers a little. But it starts rolling anyway.
The third step is Iterate — repeating. The operations step. Once it rolls, feedback comes. "This part is uncomfortable." "I don't understand why this feature exists." "This, I love." You take that feedback, fix what needs fixing, and roll again. The second revolution is lighter than the first. Momentum has gathered. The third is lighter still. The fourth, lighter. At some point, the wheel feels like it's turning itself.
The fourth step is Narrate — telling. The communication step. You announce what you've made to the world. You show people. You listen. You say, "I made this." And more feedback comes. You take that feedback back to the planning step. Refine the shape. Produce again. Iterate again. Narrate again. The wheel turns. One revolution, two, three. Each turn, a little better. A little bigger. A little faster.
One revolution, and the direction becomes visible.
The name SPIN carries many meanings. First, a wheel spins. Spin is rotation, and the core of this framework is that you don't do it once and stop — you keep it turning. Second, there's the expression "put your own spin on it" — apply your own color, your own perspective. Make something that is yours. Put your own spin on it. Third, spin as in spinning thread. The spinning wheel. You take the raw material of your idea and, using tools, turn it into something valuable. Fourth, there's spinoff — one revolution generates new ideas and reveals new opportunities. You may end up in a different direction than you started. That's okay too. Fifth, this is the execution version of DTDT. If DTDT is the philosophy of "what and why to make," SPIN is the answer to "how to make it real, fast."
Think of the wheel again.
At the center is the axle. The axle is you. What you want to do. The problem you want to solve. The value you want to put into the world. That is the center. A wheel without an axle doesn't exist. No matter how good the tools, no matter how advanced AI becomes — without an axle, there is no wheel. The spokes are the AI tools. They extend from the axle to hold up the tire. They are what help you. But more spokes isn't better. There are wheels that roll with three spokes, and wheels that won't roll with ten. Which spokes you use isn't what matters. Whether the wheel rolls — that's what matters.
This book doesn't teach tool usage. It trains the eye that chooses tools. The ability not to get lost among countless AI tools — the ability to judge what fits your situation, and to choose on your own.
Choosing a tool isn't simply asking "what's good?" and getting an answer. How is your budget? Is this project about fast validation or long-term operation? Are you alone or on a team? Can you touch code or not? Do you plan to scale later, or not? You have to weigh these variables and decide. And to decide, you need to know how tools work in principle — how categories differ, what criteria to compare by.
This book gives that knowledge. What an LLM is. How a prompt works. What structure automation tools share. The difference between a prototype and an MVP. Once you understand these concepts, you won't panic when a tool disappears and a new one arrives. Because someone who knows the principle doesn't sway when the tool changes. Many tools appear as examples throughout the steps, but please remember — those tools are only there to explain concepts. Tools change. Principles remain.
Tools change. Principles remain.
Let's return to the first question. "Is there something you want to do?"
It's okay if the answer doesn't come right away. It's a question long buried, so it needs time. But it's there. It's inside of you. What you dreamed of as a child. What you thought one day you'd try. What you thought "it would be nice if this existed." What you thought "am I the only one with this problem?" Take your time and look for it. No rush. Once you find it, it becomes the axle. The center of the wheel. Then the rest follows.
There is a problem only you can solve. There is something only you can make. Because you are unique. Your experience, your perspective, your urgency — these are one of a kind in the world. The wheel that carries them is also one of a kind in the world.
Before you turn the page, remember one thing. A wheel exists only by rolling. A wheel standing still is just a disk. A decoration. It carries nothing. It goes nowhere. A rolling wheel is different. It can squeak. It can be small. It can be slow. It can be ugly. It only has to roll.
Roll, and it steadies. The gyroscopic effect. A spinning object stabilizes itself. Roll, and a direction appears. You begin to see where to go. Roll, and speed gathers. Hard at first, but once you start, it gets easier, and faster.
Is your wheel rolling right now?
If not — the moment you close this book, roll one small thing. It doesn't have to be perfect. One sentence. One screen. One message to one person. Don't postpone until after you've finished reading. Even while you read this book, the wheel must roll. That's how the sentences in this book become real inside of you.
You already know, don't you. A wheel exists only by rolling.