When I explore space, I find two quite distinct ways space appears.
One is how the mental field creates a sense of space. When I close my eyes, the mental field can easily produce a visualization of space and its content. It can easily visualize this body, the various body parts and their relationships to each other, the room, the relationships between the objects in the room, how my body moved and was positioned in the past and may be in the future, and so on. And when I open the eyes again, I can get a quite clear sense of this mental field overlay on top of the visual field.
Space does not seem inherent in any field, and only appears through an overlay of the mental field. An overlay that helps map whatever happens in each field (visual, sound, sensation, smell, taste) in space. Even the mental field itself is mapped in space, giving a sense of thoughts happening in/around the head/body area.
This overlay of a visualized space is crucial for our human self navigating in the world. And also, it is crucial for creating a sense of a separate I. Without space, no I with an Other. A sense of a separate I is anchored here, in and around this body, and the rest of the world is out there, in the periphery.
The imagined separate I depends on visualized space to exist. And when I don’t notice how the mental field combines with the other fields to create a sense of space, space and the sense of a separate I seems solid, real and substantial. When I notice it, the sense of a separate I softens and fades.
The other seems to be free from an overlay from the mental field. This is just a sense of spaciousness absent of any end, inherent in awareness itself.
The first type is essential for mapping the sense fields in space. The second may be just an inherent property of awareness, existing independent of the first one.