“So why cannot it work the other way around as well? When the Buddha or an Arahant visits a deva world, the same courtesies and formalities take place. Is that consistent with the participants in the conversation being in only their manomayakaya body? For if the latter were the case, why bother to go there at all? The ‘contact’ can be made telepathically across space to that deva world. Or can it?”
I am not sure what the question is.
– I am saying that it may not be practical to visit brahma (deva) realms with a physical body (no oxygen, etc). Why does there have to be a physical body if the manomaya kaya is sufficient?
– As I keep saying, we cannot perceive those realms the same we perceive things on the surface of the Earth. Those realms are located far away from the surface of the Earth.