It is not possible to perceive beings in higher realms with our own experience.
– “Brahma bodies” are unimaginably small.
– They have attained “brhama bhava” by giving up cravings for not only sex but most sense pleasures in preference of jhanic pleasures.
I have been writing a series of posts at the following discussion forum. I recently wrote about this issue there.
I am trying to present a systematic presentation there, starting at a basic level (a suggested sequence of posts was published only a couple of days ago):
The teachings of Ven. Waharaka Abhayaratanalankara Thero
Since it is hard to present such a systematic approach at puredhamma.net, I plan to continue that series.