Speaking about the things around us, we mean their material integrity. We ignore the forces that connect and propel this matter.
When a human dies, he stops being a man. People begin to talk about him using words like “was”, “dead”, “corpse”, and so on. With this example, I want to show that the forces interacting with matter are parts of the material systems.
On the other hand, if we don’t have matter, regardless of forces, we will not be able to form material systems.
Each system consists of an active and passive part. The active part gives the movement and appearance of the passive part. This is why the passive part “looks like” to be active.
In conclusion, I can say that the “empty” spaces we contain (between our subatomic particles) are also part of us.