Apparently, there are two types of emptiness. But you have the understand what emptiness means in each case.
The first type of emptiness is the emptiness related to the self. This literally comes out of SN 35.85:
As he was sitting there he said to the Blessed One, "It is said that
the world is empty, the world is empty, lord. In what respect is it
said that the world is empty?"
"Insofar as it is empty of a self or of anything pertaining to a self:
Thus it is said, Ananda, that the world is empty. And what is empty of
a self or of anything pertaining to a self? The eye is empty of a self
or of anything pertaining to a self. Forms... Eye-consciousness...
Eye-contact is empty of a self or of anything pertaining to a self.
"The ear is empty...
"The nose is empty...
"The tongue is empty...
"The body is empty...
"The intellect is empty of a self or of anything pertaining to a self.
Ideas... Intellect-consciousness... Intellect-contact is empty of a
self or of anything pertaining to a self. Thus it is said that the
world is empty."
SN 35.85
It's also explained using the lute analogy in SN 35.205.
Emptiness of the self means that something (e.g. body, consciousness etc.) that you associate with the self, is not the self, does not contain self, is not owned by the self, is not apart from the self, is not part of the self etc.
And the third mark of existence states that all phenomena is not self. We can also say all phenomena is empty of a self.
The self is essentially a transient mental idea that is associated with the five clinging aggregates.
The Madhyamaka way to state this is that the self is empty of intrinsic substance.
The second type of emptiness is the emptiness of all phenomena, coming from Mahayana's Madhyamaka philosophy by Nagarjuna.
Let's take the example of a phenomena known as the "smell of metal". I just watched this interesting video "Can you actually smell metal?".
You could take something metallic using your hand and you can smell it. You would get this metallic odor. However, it turns out that metal doesn't produce any smell. When body oils come into contact with metal, it would oxidize to produce the chemical 1-octen-3-one, that is the source of the metallic odor.
So, the "smell of metal" is simply a concept concocted by the mind to explain what it senses. So, we can say that the "smell of metal" is empty of intrinsic substance.
This can be extended to all phenomena. I would explain it as "how you think something is, is not same as how it actually is."
In this way, the emptiness of self is a specific instance of the emptiness of phenomena - "how you think the self is, is not same as how it actually is."
The usefulness of this is not getting trapped in confusing the mental idea of Nirvana or other things, with what it actually is. The same teaching can be found in SN 22.85, where Ven. Yamaka learns that his mental idea of how the Tathagata is, is not the same as how the Tathagata really is.
However, there are a few things to be stated.
First, Madhyamaka didn't invent something radically new compared to what was taught in the EBTs/ Pali Canon.
Emptiness of phenomena is related to papanca (reification or objectification-classification or mental proliferation) which was taught in MN 18 and other suttas.
Second, while Mahayana usually considers emptiness of phenomena to be more important than emptiness of self and a superset of emptiness of self since the self is itself reified, Snp 4.14 puts the mental idea of the self at the root of reification / objectification - classification. Hence, Theravada holds emptiness of self to be more important, in my opinion.
"I ask the kinsman of the Sun, the great seer,
about seclusion & the state of peace.
Seeing in what way is a monk unbound,
clinging to nothing in the world?"
"He should put an entire stop
to the root of objectification-classifications (papañca):
'I am the thinker.'
Snp 4.14 (also please see this footnote by Ven. Thanissaro)
Third, according to MN 1, it is not that water, earth, Nibbana etc. don't exist at all. Emptiness is not about non-existence, rather, it's about illusion. For an unliberated person, water, earth, Nibbana etc. are all tainted with reification/ objectification-classification relative to the self. On the other hand, arahants and Buddhas see things as they truly are.
“Bhikkhus, a bhikkhu who is an arahant with taints destroyed, who has
lived the holy life, done what had to be done, laid down the burden,
reached his own goal, destroyed the fetters of being, and is
completely liberated through final knowledge, he too directly knows
earth as earth. Having directly known earth as earth, he does not
conceive himself as earth, he does not conceive himself in earth, he
does not conceive himself apart from earth, he does not conceive earth
to be ‘mine,’ he does not delight in earth. Why is that? Because he
has fully understood it, I say.
“He too directly knows water as water… Nibbāna as Nibbāna… Why is that?
Because he has fully understood it, I say.
“Bhikkhus, the Tathāgata, too, accomplished and fully enlightened,
directly knows earth as earth. Having directly known earth as earth,
he does not conceive himself as earth, he does not conceive himself in
earth, he does not conceive himself apart from earth, he does not
conceive earth to be ‘mine,’ he does not delight in earth. Why is
that? Because he has understood that delight is the root of suffering,
and that with being as condition there is birth, and that for whatever
has come to be there is ageing and death. Therefore, bhikkhus, through
the complete destruction, fading away, cessation, giving up, and
relinquishing of cravings, the Tathāgata has awakened to supreme full
enlightenment, I say.
“He too directly knows water as water… Nibbāna as Nibbāna… Why is that?
Because he has understood that delight is the root of suffering, and
that with being as condition there is birth, and that for whatever has
come to be there is ageing and death. Therefore, bhikkhus, through the
complete destruction, fading away, cessation, giving up, and
relinquishing of cravings, the Tathāgata has awakened to supreme full
enlightenment, I say.”
MN 1
Fourth, the Buddha was not interested in ontology and metaphysics. Does a chair exist or does a chair not exist or how does a chair actually exist was not important to him. He was only interested in ending suffering. This can be seen in the Parable of the Poisoned Arrow, The All sutta and the sutta of the unconjecturables.
It might make perfect sense in another language; it might work in a specialised form of philosophical or theological English but in ordinary English, it could never work.
'… things are not as…' or '…how they appear…' but 'as how' will never be correct. Is that not also true in the language this came from, or in Buddhism generally?
More…
– Robbie Goodwin Oct 09 '23 at 18:28The proper translation might be not 'in…' but 'is cultivated…' and does no-one mind, that makes too much difference to be ignored?
I knew nothing of 'anatta' until reading your Posts but two things: the WWW doesn't seem to recognise 'anatta' as 'emptiness'.
Further, '… emptiness of self…' or '… of all phenomena' is another thing that will not work in English'
Did you mean 'absence'?
– Robbie Goodwin Oct 09 '23 at 18:39