The word "宇宙" means the 'universe' in modern Japanese. Almost of Japanese researchers understand the word in the contemporary sense. However, as you can see easily from the figure, "宇" and "宙" are a pair of words with opposite characteristics.
The former means space, and the latter means time. That also reflects the Tendai duality philosophy brought by the monk Ninmon. BAIEN thought that space and time are twin fields that encompass the entire universe. Space "宇" gives the place of existence to everything in the universe, and Time "宙" in the field of change for all of them.
If there is no field of time, the universe will be a magnificent panorama, and if there is no field of space, the world will have only chaotic changes that have no shape. In either case, we will not be able to recognize the world. In the former case, we will be part of the panorama, and we will disappear into the chaos in the latter case.
BAIEN reached this recognition in the 1770s. However, almost all researchers did not understand the duality of time and space. They have mistakenly understood "宇" and "宙" as the meaning of 'universe'. Because they think that the two opposite words as one language "宇宙". The word means the universe in modern Japanese. The word "没" in the center circle means non-material existence.
However, the word "没", which means "non-materials", located in the material domain. This word indicates that it is a non-material domain in the material domain. That means space, orbit, past, future, directions, and so on. Those are all the non-materials concepts.
In other words, BAIEN thought space-domain itself is just a field, and the time-domain itself is also only a field. And the space-domain gives each place of all existence, and the time-domain gives all changings to all of them. But because it has various attributes such as trajectory, direction, and position, past, present, and future. He thought it was not wholly non-material.
There are "緯" which is left the side of "没" and "経" which is the right side. BAIEN compares "経" to the warp of cloth and "緯" to its weft. He may also examine the two words to the river flow and the spread to the shores on both sides. Let's use a metaphor of the river here.
The river assumes that both banks are infinitely far. The flow is "経" and both banks are "緯", and the banks put infinitely far can correspond to space. In this metaphor, the river flow is the time to change the entire universe, and space is an infinite area where wrap all existences.
What is important here is that BAIEN's Holonic Dual Path System has "経" and "緯" as superordinate concepts of time and space. BAIEN had already created a system with time and space as subordinate concepts in the 1770s.
The "時" and "通" in the right circle indicate the character of "宙". In simple terms, "時" is time and "通" indicates it is time flow. "處" and "塞" in the circle on the left indicate the character of "宇" which means the empty space. "處" indicates that it is a place where objects exist.
The relationship these words indicate is the same whether the child is running in his house or the planet is in its orbit.