Kamma is key...
There is the question 'how does this feel?'.
There is feeling of bodily sense doors and feeling of mind sense door.
MN 148.
http://www.dhammatalks.net/Books9/Bhikk ... _Sutta.htm
The Blessed One speaks to the bikkhus; to mendicants established in sila (not siimply 'friends', 'students', 'mediators'- but to those with the proper underpinnings of virtue) :
""Bhikkhus, dependent on the mind and mind-objects (eye and image, ear and sound, nose and odour, tounge and flavour, body and touch), mind (eye, ear etc) -consciousness arises; the meeting of the three is mind-contact; with mind-contact as condition there arises [a mind-feeling] felt as pleasant or painful or neither-painful-nor-pleasant. When one is touched by a pleasant mind-feeling, if one does not delight in it, welcome it, and remain holding to it, then the underlying tendency to lust does not lie within one. When one is touched by a painful mind-feeling, if one does not sorrow, grieve and lament, does not weep beating one’s breast and become distraught, then the underlying tendency to aversion does not lie within one. When one is touched by a neither-painful-nor-pleasant mind-feeling, if one understands as it actually is the origination, the disappearance, the gratification, the danger, and the escape in regard to that mind-feeling, then the underlying tendency to ignorance does not lie within one. Bhikkhus, that one shall here and now make an end of suffering by abandoning the underlying tendency to lust for pleasant mind-feeling, by abolishing the underlying tendency to aversion for painful mind-feeling, by extirpating the underlying tendency to ignorance in regard to neither-painful-nor-pleasant mind-feeling, by abandoning ignorance and arousing true knowledge - this is possible."
When the feelings are clung to :"When one is touched by a pleasant mind-feeling, if one delights in it, welcomes it, and remains holding to it, then the underlying tendency to lust lies within one. When one is touched by a painful mind-feeling, if one sorrows, grieves and laments, weeps beating one’s breast and becomes distraught, then the underlying tendency to aversion lies within one. When one is touched by a neither-pleasant-nor-painful mind-feeling, if one does not understand as it actually is the origination, the disappearance, the gratification, the danger, and the escape in regard to that mind-feeling, then the underlying tendency to ignorance lies within one." the kamma-fruit of craving aversion and ignorance are the underlying tendencies.
"However, Vipassana can teach us far more than simply learning to be non-reactive in the face of unpleasantness." and pleasantness and neither pleasantness nor unpleasantness.
"As such, all phenomena are unsatisfactory because they cannot be relied upon as a solid basis for lasting happiness." -.?.
Clinging to that which is anicca, constantly changing, is the reason for dukkha, suffering. Bare awareness of anicca evaporates defilements.
"Mahasi’s approach to physical sensations involved consciously (how else?) noting what is observed." - and then returning to the object of meditation, for example the rising and falling of the abdomen. The point being that the mind gets drawn (by habit) to things that happen on the mind body phenomenon and therefore to detach the phenomenon is noted and left. It's not to conrinuously engage in noting. Likewise, once the mind is focused by continually bringing it back to object of meditation (for example breath where it enters and leaves the body) the mind body phenomenon is systematically, equanimously, making neither pleasant, unpleasant nor neutral sensations more important than any other, noted and the awareness returns to the object of meditation, in this case whatever feeling (sensation) that may arise as one progressively moves attention from the top of the head to the tips of the toes. Again attention is habitually drawn to some feeling that arises and again the training is to simply note this, detach, and return to the object of meditation. Over time the underlying tendencies are abandoned.