…the last few days I have been reminded of Chen Man-Ch’ing’s practice description for the stage of man, mainly: relax from the shoulders to the wrist, from the hip joint to the heel, and from the sacrum to the headtop (in the Ben Lo Martin Inn translation, this is “relax the ligaments”; I don’t think that’s actually possible, as ligaments stretch and resile but it’s muscles that contract and relax- nevertheless, I take the meaning as resting weight on the ligaments in such a way as to realize reciprocal activity in associated postural muscles).
So your practice is very clear, as to the relationship of the movement of breath and the free movement of the sacrum. You are describing how it feels, and a big trick for me is that the sense of place as consciousness occurs can cause the stretch in existence to generate activity to align the spine and produce feeling. This is a big trick because if I put all my energy into feeling the breath or the movement of the sacrum, I will finally lose actual feeling for having directed the occurrence of consciousness to the particular place. So I think to rely instead on the movement of breath and the cranial-sacral rhythm to place consciousness, and I look to realize impact as consciousness occurs, impact and feeling. Is this natural? It is really just staying with what’s happening, not a gaining practice.
My posture is pretty bent, usually, so I envy you the clarity of “up the spine”. I guess the reason I mentioned learning to dance is because that’s where I sometimes feel an uprightness in the spine both on the inhale and the exhale, yet the feeling is intimately tied to resting the weight of my body on the sacrospinous and sacrotuberous ligaments and allowing movement from that stretch. At least, that’s the way I feel it.