Therefore, even if the original universe divided into four heavens, there is no limit to each heaven. Not only the second, third, and fourth heavens, but the first heaven which is a fleshly world also doesn't have limit.

 

However, you should not understand the spiritual space in the way you understand the fleshly space.

In the fleshly space, if you cut a certain space into four parts, each space becomes smaller than the original one.
But this concept doesn't apply to the spiritual space.
It is because there is no limit in the spiritual space.
When the vast limitless universe divides into four, it becomes four vast limitless universes.
No matter how many times it divides, it is the same.
Therefore, even if the original universe divided into four heavens, there is no limit to each heaven.
Not only the second, third, and fourth heavens, but the first heaven which is a fleshly world also doesn't have limit.
Even with the current highly developed science, the end of the universe hasn't been found yet.
That's why people say the universe is huge and endless.
As the first heaven, which is the fleshly world, is vast like this, how much more vast are the other heavens which belong to the spiritual realm?
Now, at the moment the original universe divided into the four heavens, each heaven didn't have 'contents' in it yet.
God just divided it properly in accordance with its own purposes, but the contents of each heaven had not yet been created.
For example, when people build a house, they make different rooms in different areas of the house according to the purpose of the rooms.
Living room, children's room, kitchen, garage, etc; they are different in size and location according to their purpose.
And each room is separated by walls.
Right after the house is built, there are spaces separated by walls, but they are empty spaces with no furniture and living supplies.
The moment when God the Origin cohered into a light and the original universe divided into the four heavens the universe was at the same stage as this house.
However, they were not completely empty.
There were countless stars like today.
The galactic systems and countless stars already existed.
They were already in the original universe where God the Origin existed alone.
Even though God the Origin existed alone, it doesn't mean that there was nothing in the original universe.
There were countless stars and the galactic systems which are extremely large group of stars.
By then, however, there was no earth and the galactic system to which the earth belonged.
The earth, our solar system, and our galactic system were created later as the foundation for human cultivation.
In this original universe, as God the Origin cohered as a light, the space where the spiritual attributes almost diminished to nothing is the universe that we see today with our eyes.
Now, how did God separate each of the heaves and for what purposes?
God separated the first heaven to make it a foundation for the human cultivation.
The second heaven was prepared as a space for the spirits of the darkness which are necessary for the human cultivation. But it was also for Adam who would be created as a living spirit.

The third heaven was separated to build Heaven where the good grains received through the human cultivation would enter.
The Bible clearly says that this Heaven is located in the third heaven.
2 Corinthians 12:2 says, "I know a man in Christ who fourteen years ago--whether in the body I do not know, or out of the body I do not know, God knows--such a man was caught up to the third heaven."
And 2 Corinthians 12:4 says, "[A man] was caught up into Paradise and heard inexpressible words, which a man is not permitted to speak."
Apostle Paul was caught up into the third heaven, and it was Paradise he went to.
Paradise is one the many dwelling places of Heaven (in the third heaven).
From this, you can see that the third heaven is the space where Heaven is located.
Finally, the fourth heaven is the space for God the Trinity.
The very place where God the Origin cohered into a light is in the fourth heaven, and this fourth heaven shares the same dimension as the 'original universe.'
God created the heavens according to their own purpose, but as I said, there were no contents yet.
For example, the earth, our solar system, and our galactic system had not yet been created in the first heaven which is the foundation for human cultivation.

http://www.manmin.org/foreign/02_sermon/en/content.asp?id=946&cat=22&page=5