How can one know if one just has experienced bhavanga or really fruition, please tell me what are the indicators that one experiences fruition for sure?
For example how is the Body looking when beeing in bhavanga and how looks the body when dwelling in Nibbana?
Welcome to the forum Sala.
I think what we can know is that overestimation is common in the world of spiritual attainments.
Even a moment of satipatthana is something rather extraordinary and valuable as that is a moment starting on the path. For this to occur there has to be real wisdom and if it is repeated then wisdom is accumulating. The attainment of actual vipassana nana is another level - let alone magga and phala . The one who attains the path has deep understanding - they are not deluded or in doubt about the nature of reality.
bhavanga is characterized by blanking out.
Another thing is that besides some of the over-achievers in parami during the time of the Buddha, all other practitioners should pass through the different stages of insights.
There are particularly 2 stages of udayabbaya ñāna (seeing the arising and passing away of mind and matter)… The second stage will have the upakilesas arise (false symptoms taken as enlightenment). One needs to overcome these upakilesas and go beyond this before they can complete the stage of knowing the what the path is and what is not the path. Maggāmagga ñāṇadassana vissuddhi. The chance for enlightenment can only happen after this and other stages are complete.
- Sīlavisuddhi – Purification of Morality
Purification of conduct by adhering to ethical precepts. - Cittavisuddhi – Purification of Mind
Purification through concentration, resulting in a calm and stable mind. - Diṭṭhivisuddhi – Purification of View
The correct understanding of the distinction between mind (nāma) and matter (rūpa). - Kaṅkhāvitaraṇavisuddhi – Purification by Overcoming Doubt
Overcoming doubts about the path by understanding cause and effect through dependent origination. - Maggāmaggañāṇadassanavisuddhi – Purification by Knowledge and Vision of What is Path and Not-Path
This stage involves discerning what is the correct path and what is not. It is divided into two stages: - Taraṇa (wrong): In this stage, meditators may experience certain false insights or misleading experiences that seem profound but are actually not the correct path.
- Paṭisankha (right): In this stage, the meditator recognizes these deviations and adjusts, discerning the true path.
- Paṭipadāñāṇadassanavisuddhi – Purification by Knowledge and Vision of the Way of Progress
Insight into the three characteristics (impermanence, suffering, and non-self) deepens, and there is a clear understanding of the correct practice. - Ñāṇadassanavisuddhi – Purification by Knowledge and Vision
This final purification is the attainment of enlightenment (Nibbāna) through the realization of the Four Noble Truths.