The 3-step structure is not the end - the real power that creates the world lies in "repetition" and "assembly"

Earlier, we said that most concepts in the world are made up of a 3-step structure (3depth).

• Module → Class → Method

• Database → Table → Record

• Model → View → Controller

• Higher concept → Intermediate concept → Concrete element

And this structure is also said to be the depth that human thinking most intuitively understands.

But there is one more important fact here.

The 3-step structure is not "completion" but "ingredients."

Now let's talk about the core.

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The 3-step structure is like 'Lego blocks.' True creation happens in the process of "repeatedly assembling these blocks."

Think of Lego blocks.

A single block itself is not a finished product. But when that block is repeated and assembled dozens, hundreds, or thousands of times,

• It becomes a robot

• It becomes a castle

• It becomes an airplane

• It becomes a spaceship

Each one is a simple block, but through combinations, completely new worlds are created.

Programming is the same.

• A single class is nothing

• A few methods have no meaning

• A single model does not become a service

But when you repeat and assemble these units, it becomes a service.

• Multiple classes collaborate to create functions

• Multiple tables are connected to create a data ecosystem

• Multiple methods together create a flow

The 3-step structure is a "unit block" and a "minimum structure that can be assembled."

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Repetition is a tool for simplifying complexity

The world may seem complex, but in fact, complexity is the result of repetition.

For example:

• Human body:
  Cell → Tissue → Organ (3 steps)
  This is repeated infinitely to form the entire body.

• City buildings:
  Pillar → Structure → Building (3 steps)
  This is repeated to form a city.

• Music is similar:
  Note → Chord → Progression (3 steps)
  This is repeated to form the entire song.

Programming is exactly the same.

• Method → Class → Module (3 steps)

• Record → Table → Database (3 steps)

This is repeated, and the entire service is created.

Complexity is simply the result of repeated simple structures.

The world is made up of 'repetition of simplicity.'

The moment you understand this principle, the reader finally engages in "structural thinking."

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Divide & Conquer: Problems are solved by breaking them down

The 3-step structure is not just for organizing neatly.

This is directly related to the core principle of problem solving, Divide & Conquer.

When faced with a big problem, people think like this.

"It's too complicated... Where do I start?"

But 3-depth thinking says this.

1. First, define the big picture (Module)

2. Divide it into specific areas (Class)

3. Define the actual actions (Method) within it

And by assembling this structure repeatedly, the entire problem is eventually solved.

This is the most powerful way of thinking in programming and the foundation of all creative work.

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So the real important realization is this

"If you can break it down into a 3-step structure, you can create anything."

Whether it's a web service, an app, a company, a city, or even the human thought system, in the end, by repeating and assembling small units with a 3-step structure, everything is created.

The moment the reader realizes this,

• They no longer struggle to see the 'whole' first

• They develop a habit of 'breaking down' problems

• They gain the ability to draw the whole by assembling units

And one day, looking at the service they created with their own hands, they realize.

"Oh... I made this.

I just stacked up small pieces one by one...

And it was completed before I knew it."

This is how developers view the world and how creators make the world.