Well I just wanted to make one since I don't have one and since it's the kool thing to do and everything xD (jk). But I also don't wanna spend too much time trying to think of stuff and posting. Mainly because I don't have the time to nowadays and I don't think I have much to contribute.
But let's start off with what was started on Claudiu's thread with a reply from End in Sight
End in Sight:
ManZ A:
As for felicitous feelings, I've just found they make it easier to remain sensuous. If one is felicitous it becomes easier to notice the "arupa" qualities of experience as felicitous feelings (e.g. naivete) are the lightest forms of "being".
To be precise, I'm talking about the qualities that one has as a focus of experience in the 4 arupa jhanas (space, consciousness, nothing, signlessness). (The names are not very informative, but the experiences of them clarify things.) Is that what you mean?
Do you have a practice thread that we can move this to?
Well I mean something else based on my experience.
First off, I should mention that I have never entered a jhana (at most I will say access concentration) and I have never experienced what are here called "vibrations" doing vipassana (aside from one drug induced experience and some when waking up from sleep, but I don't know if I can count those). So I'm just guessing what the arupa qualities are based off a PCE and EE.
The easiest one to see is infinite space (imo). Since in the suttas it mentions that one enters the base of infinite space after going beyond perception of forms. My interpretation of it is that this perception of form is the form that "I" possess in this body and the forms that "I" see in others' bodies. It is "my" body and "my" perception of others' bodies (and objects). In my experience it's felt as if certain parts of the body are clinged to and "zoomed into" (this is not actual). When one is attentive and one is sensuous then this perception of form disappears and then there is infinite space (where only forms that are actual are seen with the eye) and my location cannot be felt or "seen" (or it'll go in that direction). When "my" perception of form is not there, then what becomes apparent is infinite space. So I assume this is like an experience of the base of infinite space. I can't say too much about the others as I don't know what consciousness or nothingness would be like. But since some here have mentioned that the formless jhanas have qualities that are in the actual world I assume those become more apparent as one gets more sensuous as well.