Hi Geoff and IanAnd,
Brizzy wrote:What is one thing that the Buddha continuously asked his followers to practice? - Mindfulness of Body.
According to the Kayanupassana http://www.ancient-buddhist-texts.net/T ... assana.htm
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know the biological insides of our physical body - hairs of the head, body hairs, nails, teeth, skin, flesh, sinews, bones, bone-marrow, kidney, heart, liver, pleura, spleen, lungs, ... Speaking from a point of experience do you experience direct knowledge of these aspects of the physical body during jhana? Do you experience them as pleasant, the pleasant feeling of jhana in the nails and kidney and liver? Because I don't. In what I would call jhana I experience pleasant feeling permeating my body, yes, but no liver and pleura and lungs, just an experience of form permeated by pleasant feeling. There are the elements, yes, but no biological aspects. I have experienced the awareness of the biological body now and then but via a different route than the elements - they seem to me to be on another level of observation.
So from my point of experience I would say that kayanupassana is different from jhana. The body experienced during jhana is either the one made of the elements or the mind-made one or the formless one, but never the biological one. This rather agrees with the yoga system and the Tibetan system - in both the body made of the elements (the gross body) is not the biological body - of course this is Theravada and it might be different here but I would like some proove to accept that.
So: are you really sure you are aware of the biological body during jhana: hairs of the head, body hairs, nails, teeth, skin, flesh, sinews, bones, bone-marrow, kidney, heart, liver, pleura, spleen, lungs, ...? Can you control the biological body during jhana as one can control the elements - change blood pressure, heart beat, body temperature, guide a poison through the intestine without it being assimilated ... ?
And are there suttic references that identify without doubt the elemental body of the first jhanas with the biological body in contrast to the yogic and Tibetan systems that don't ?