فإنها لا تخلو عن الحركة والسكون وهما حادثان
Bodies are never free of motion or rest, both of which are originated.
The first step is that a spatial body always has some spatial condition. Its relation to a preceding occupation is expressed through movement or rest. The second is to show that these conditions are originated, rather than eternal features.
Seeing some bodies move is insufficient to prove a universal claim. Equally, the hypothesis of a body that remains permanently at rest must be addressed independently rather than dismissed by definition.