Freawaru wrote: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.
This is what we are discussing.
Freawaru wrote: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.
What "biological body" is there apart from the interdependence of the four elements and the mind?
If by "Tibetan system" you mean the tantric systems such as the Six Dharma-s of Nāropā, these represent a completely separate path and are beyond the scope of the present discussion.
From among the Sūtrayāna systems of Tibetan Buddhism, regarding dhyāna, one can choose to follow the interpretation of the Vaibhāṣika Sarvāstivāda (which is similar to the classical Theravāda abhidhammika interpretation), or the Sautrāntika interpretation given in the Abhidharmakośabhāsya (which is similar to what is given in the Pāḷi sutta-s), or the Yogācāra interpretation given in the Śrāvakabhūmi (also similar to what is given in the Pāḷi sutta-s).
Freawaru wrote:So from my point of experience I would say that kayanupassana is different from jhana.
Please see MN 119: Kāyagatāsati Sutta section on jhāna.