Hi,
One can never say that being an arahant is a requisite for tasting the peace of Nibbana…i believe. The only requisite for tasting Nibbana is a heart that is freed from all what oppresses it…freed from the defilements and its effects.
If in sutta’s is describes how mind must be purified this does not at all mean for me that the 6th mind-consciousness or mental consciousness must or becomes purified. But the heart. It is a much deeper level. It is not the mind-consciousness that chooses to react with lobha, dosa and moha on a sense-object but this happens on a subconscious level. And when this choice is made by the mind or heart,
mind-consciousness becomes aware of the choices that are made on this subconscious level.
For example, if i see something and i become mindful that dislike has arisen, i know this choice is made on a subconscious level. It was not really my conscious decision.
Purifying mind means that we purify the ground of our personal existence, as it were. The tendencies (anusaya), habits, wrong views etc that are with us as our personal picked up bagage. But certainly we do not purify mind-consciousness or mental consciousness. Mental consciousness is a means to purify because it has the mindfullness to notice the arising defilements and the wisdom not to feed them. That way we purify, as it were, the ground of our personal existence, which goes much deeper then what happens and is noticed in the head.
The requisite for tasting the peace of Nibbana is that whatever we have collected of anusaya, ditthi, avijja, lobha, dosa, moha, asava is now nullified, uprooted and cannot rule our thinking, speaking and acting anymore. It is a deep purification. It is not at all the same as purifying the mental consciousness but it goes much deeper. A nice way to talk about this is purifying the heart.
When there is no clinging and no engagement anymore via lobha, dosa and moha, perceptions still arise and cease. But because they do not become eye-ear…mind catching anymore, those vinnana’s do not establish or land anymore. This knowledge gives one the certaintly in this very life that rebirth is ended, i believe. Because when all is uprooted for vinnana to establish, land and grow, how can that happen in a next life?
The nature of this purified heart, which is the quality of our existence, is just that it is peaceful, cooled, at ease, unburdened.
There is no arahant, ofcourse, who experiences this or that, like there is also never a worldling who experiences this or that. Such are only conventional ways to talk about things. But there has never ever been a worldling who experiences things nor an arahant. It is always only the knowing element in our lifes that does in all cases, in all beings, in all phases.
Yes, i believe asankhata refers to the empty, peaceful, open, signless, desireless, uninclined nature of the purified heart. The heart is not really intrinsically passionate. No, all defilements are adventitious.
One can see formations arising, passions, feelings, memories, tendencies, plans, moments of smell, sound, visual etc (vinnana’s) but there is no person in the entire world who has ever seen the empty, desireless, open, uninclined nature of a purified heart arising. Who does?
Ofcourse there is something stable, constant and Buddha teaches exactly a Path to the constant, stable, not-desintegrating (SN43) Does stable mean the same as eternal? I do not believe so. What is not seen arising, ceasing and changing is beyond expression in terms of time and space and existence. One cannot even say it exist or that is a continuum. Mental proliferation comes to an end. It fails.
Why is the peaceful, empty, open nature of the pure mind called not-desintegrating and unmade? I believe, because is not at all a result of constructing. The peace of jhana is constructed, the peace after a satisfying meal is constructed, the peace after having succesfuly ended some project is constructed etc. But this peace of Nibbana is not constructed at all. How can what is not constructed desintegrate?
This is also the meaning of Ud8.3 and many other sutta’s for me. Buddha-Dhamma distinguishes the made and unmade, the constructed and unconstructed, the produced and not produced, the conditioned and unconditioned. And we all know the made, the produced etc.
But the Path of the Buddha is about seeing the unmade, the unproduced, the unconditioned, unconstructed because only that can be called safe, protection, refuge. Something that is liable to arise and cease, like jhana, Buddha immediately understood as unreliable, no refuge, and not what he searched for. Why would one take refuge in something that ceases? That is what all beings do. That is just the normal worldy wat to deal with suffering, but not the stream the Buddha entered. He sought what is not conditioned and is not liable to cease.