Continuing the discussion from Help for responding to people who say: Buddha never said there's nothing after parinibbana:
From the perspective of the complete cessation of consciousness at parinibbāna — considering that the nibbāna-dhamma realized by the arahant is not a form of his continued existence, preservation, or awareness — the presence or absence of some abstract “dhamma,” “āyatana,” “dhātu,” or, generally, a nibbānic reality changes absolutely nothing. For the arahant, the moment of physical death is the end — the cessation of all subjective experience.
Therefore, the author here seems to be subtly and mystically suggesting that final nibbāna is not actually the cessation of consciousness and existence. That implies some form of conscious existence for the arahant — though said to be inexpressible and not reducible to conditioned aggregates. In other words, what is being proposed is a mode of being and awareness in the form of an unconditioned element.
But unconditioned, eternal, blissful existence and consciousness — this is nothing other than the good old ātman of the Indian systems.
If the author denies that nibbāna is cessation, and at the same time fails to see the classical nibbāna-dhamma as simply the designation for cessation (with the presence of a “truth” or “principle” of cessation, not a metaphysical entity), then he is effectively affirming a form of inexpressible, transcendent existence for the arahant after parinibbāna. I stress: inexpressible and transcendent, beyond formations, yet nevertheless some kind of being (as opposed to cessation).
The author seems to be saying that:
• (I) It is one extreme to see nibbāna as mere cessation of formations;
• (II) It is another extreme to see it as the continuation of purified, joyful formations;
• (III) And the supposed “middle” is to posit an unconditioned reality — essentially, a transcendent post-mortem state or mode of being for the arahant.
In effect, then, what is being proposed as a “middle way” here is the postulation of an unconditioned ātman — one that avoids the flaws of continued formations and the dread of total cessation without remainder.