Hi Alain and others,
As said, we’ve had these kind of discussoins before. I don’t want to repeat those, but there are some unexplored angles here which I find interesting. In particular:
It’s a great saying. But Epicurus said this because he rejected any kind of afterlife. In his view, death results in the end of existence for all beings, regardless of their knowledge or deeds. Epicurus is saying, when you don’t exist anymore, you cannot suffer either. Therefore, “death is nothing to us”. Epicurus’ teachings are remarkably similar to those of the (materialist) annihilationist in the suttas, who say the soul and the body are the same, are made of matter, are the ‘self’ that after death doesn’t exist anymore.
There is also a famous grave inscription adopted by Epicureans: “I was not; I have been; I am not; I do not care.” Which means: “I didn’t exist before birth. Then I was alive for a while. But now I am death, I am no longer, so I cannot mind that.”
This revolves around an I or self. That assumption is also an intrinsic part of the doctrine of annihilationism in the suttas (which never define or challenge annihilationism in terms of its supposed outcome but in terms of what gets annihilated). For example, there is the annihilationist catchphrase which bears some similarity to the Epicurean epitaph: “I might not be and it might not be mine; I will not be [after death], and it will not be mine.”
Interestingly, the Buddha called this view the foremost view of outsiders (AN10.29), because “it can be expected that those who hold such a view will not be attracted to existence and be unrepelled by the cessation of existence”.
The cessation of existence is how some suttas define nibbāna, e.g. SN12.68: “Extinguishment is the cessation of existence.” That this refers to parinibbāna is clear from Iti44: “that with no residue, which pertains to what follows this life, where all states of existence cease”.
“Extinguishment is the cessation of existence” is an actual definition of nibbāna from the suttas. It is never defined as some existent ontological reality. Still, cessation is possible, so it exists in that sense, as @NgXinZhao indicated. Hence it is said: “There exists a complete cessation of existence.” (MN60) This means the complete cessation of existence is a real possibility, not that it is some really existent something.
Likewise, the Buddha’s middle teaching between “existence” and “nonexistence” also is never explained in the suttas as nibbāna lying beyond both existence and nonexistence, or alike. Instead, the middle is explained as consisting of arising and cessation. This includes the arising and cessation of existence (bhava), of the aggregates including consciousness.
How I (and the (sub)commentaries) make sense of this I have explained before. In short, the wrong notions of “existence” and “nonexistence” are respectively the view that the dead exist forever and the view that there is only a single life. The Upanishads reflect this ancient dichotomy:
There is this doubt about a man who is dead. ‘He exists (asti),’ say some, others, ‘He exists not (nāsti).’”
The Buddha’s view falls in the middle, because he acknowledges that there is life after death, but it doesn’t last forever. There is rebirth (i.e. arising) for a number of lives, but after enlightenment existence comes to an end (i.e. cessation).
Hence the Kaccānagotta Sutta says (in my translation):
Kaccāna, most of the world relies on a duality: the notion of survival (atthitā) and the notion of nonsurvival (natthitā). But if you see the origin of the ‘world’ [of the six senses] by understanding it in line with reality, you won’t have the notion of nonsurvival with respect to it. And if you see the cessation of the ‘world’ by understanding it in line with reality, you won’t have the notion of survival with respect to it. (SN12.15)
Note that the Buddha again doesn’t say that these notions are abandoned by seeing that nibbāna is some ontologically existent reality beyond existence and nonexistence, let alone that it incomprehensible. The middle is seen by understanding the arising and cessation of the six senses (the “world”).
I know some, like Bhikkhu Bodhi, base the idea of nibbāna as an existent ontological reality on words like dhātu and āyatana. However, neither dhātu nor āyatana necessarily refers to an ontological existent. The teaching of annihilationism is also called an āyatana (MN102). There is also such a thing as the dhātu of cessation (Iti51), which refers directly to nibbāna. Dictionaries correctly include for āyatana such meanings as ‘case’ and ‘opportunity’ and for dhātu ‘principle’ and ‘property’. So instead, the cessation of existence—which we have seen is how (pari)nibbāna is defined—is an existing opportunity or principle. To instead conclude it is an ontological existent, is to derive too much from these very broad terms.
That is how I see it, based on the suttas.
But this may all be somewhat moot in view of the discussion, because I agree with @Nikolas: if there is no consciousness, then it doesn’t really matter if there is anything else left. Without consciousness, it can’t be experienced anyway. So for all practical purposes it is the same as a complete cessation.
Anyway, there is something left after parinibbāna, according to SN12.51:
Likewise, they [the enlightened beings] understand that when their body falls apart, after death, when life comes to an end, all that is experienced, not being enjoyed, will cool off [i.e cease] right then, and only bodily remains will be left.