I put “exist” in quotation marks for a reason. Either way, in my understanding, views about the existence or nonexistence of rocks are irrelevant to understanding the Dhamma. Seeing the origination of suffering is understanding how craving leads to rebirth, and this has little to nothing to do with whether rocks really exist or not, regardless of how we interpret “exist”.
The bigger problem is that we thing we exist in some sense, as some sort of self (and likewise see a self in other beings). The (imagined) existence of rocks is not so relevant.
I understand “not conceiving” to mean not seeing a self in those things. That is the standard use of ‘conceiving’ in the Canon in contexts such as this. It doesn’t matter if you think the “seen” in some sense exists or not (or if you don’t have an opinion either way), as long as you don’t take it to be a self or owned by a self, and don’t take it to be permanent or happiness.
I am not much taken by Venerable Ñāṇananda’s phenomenological approach in general. I think he gets a lot of things wrong in his readings of the suttas, predominantly regarding Dependent Origination and particularly nāmarūpa. The Buddha was talking about some much more profound concepts. Whether you think rocks exists or you think they do not, you suffer much the same. Anyway, that takes us off topic.
OK, but then you misunderstood my point, Bhante. In that case just substitute my earlier “chairs and rocks” with wavelengths, photons, mass, energy, and so forth, or with whatever external “stuff” may give rise to sensory input.
You can’t prove that nothing whatsoever exist outside of the observer, that is what I was saying. Also, that is a very unnatural assumption, as I explained. If there is nothing but our perception, who/what is the Buddha, what does “the word of another” even constitute? Did I make up the Dhamma “myself”? Does it all exist in my mind? Am I talking to “myself” right now in some self-constructed Matrix? It all makes much more sense if there is external “stuff”, whether it be chairs and rocks or just energy. (But again, my point being that all this doesn’t matter to the Buddha, as that’s not what he was on about. This sort of conjecture is like the leaves he left untouched in he canopy overhead.)
Also, you take the Buddha’s definition of “the world” to refer to the external world in some sense, even if misconceived or just existing in the mind. But, we sort of glossed over this earlier, ‘the world’ is defined as the six senses through which you perceive the world. That is, as the six sense “organs”, not (or at least not just) as the perceptions we have through them:
Whatever in the world through which you perceive the world and conceive the world is called the world in the training of the Noble One. And through what in the world do you perceive the world and conceive the world? Through the eye in the world you perceive the world and conceive the world. Through the ear … nose … tongue … body … mind in the world you perceive the world and conceive the world. (SN35.116)
So the “world” is not just our perceptoins, but that with which we perceive the world. It’s the six senses as “organs” of cognition. And these six senses arise when a being is born. They don’t arise moment by moment, like our perceptions of the world. So “the world” to the Buddha is the being.
That’s because it’s our personal existence that matters, not the existence (or nonexistence) of the external world. This, again, is the entire point behind the Buddha’s redefinition of “the world”, to bring us back from speculation about externals to what is actually important to end suffering.
This is also indirectly indicated in SN12.44:
If we base our reading of the discourse solely on the description of origination of “the world”, we might conclude the world originates when sense impressions and consciousness arise. This would give credence to interpretations where ‘the world’ is interpreted to be some deluded concepts or experiences of the external world. However, the last paragraphs which describe the disappearance of the world also include the arising of sense impressions and consciousness. So the difference between the world’s origination and its disappearance is not found in the first half (the bold part) of the paragraphs. It is only found in the second half, which describes the arising and ceasing of rebirth and existence as a result of craving. By ‘the world’ the Buddha therefore did not just mean subjective experiences, but also (if not primarily) the being who has the experiences. This “world” originates when the being is born and disappears when its existence completely ends.
When the Rohitassa sutta speaks about the origin and cessation of “the world”, it also means the being. The Buddha says, “I declare ‘the world’, its origin, its cessation, and the practice that makes its cease, with reference to this fathom-long body along with its mind and perception.” The origin of this fathim-long body with mind is rebirth, and its cessation is the end of personal existence. As another indication of what he’s on about, the practice that makes it cease, the eightfold path, surely refers to the being, not to the external world. To Rohitassa, the path to the end of the world exists in the external world. To the Buddha, that “world” doesn’t matter.
When the Kaccāyanagotta Sutta mentions the origination and cessation of the world, this is what it is on about as well: rebirth and its ending. Because the middle view between annihilationism and eternalism is not arrived at through understanding how “the world” would be a construct of the mind. It is by understanding how rebirth happens without a self, which is a completely different matter.
Of course, when the six senses cease, all perceptions of the external world cease alongside. So that is another reason for the Buddha’s redefinition of ‘the world’. But I don’t think it is a phenomenological or metaphysical matter in a much deeper sense than this.
Just to be clear, I’m not defending materialism or dualism, nor realism. I’m just saying that views about the makeup of the external world are not relevant for understanding the dhamma. For one, because you can never definitely proof either way whether things exist outside of us or not, or if they do, in what form or shape. All the science about wavelengths you mention is indirect knowledge, knowledge arrived at through measurements rather than direct observation, knowledge, also, which the Buddha and other arahants 25 centuries back (or even further back) wouldn’t even have had.
And therefore, to bring it back to the topic, when the Buddha declares only suffering and its cessation, it refers to the being and its experiences, not to things that may exist when not experienced—whether we call it chairs and rocks, or photons and energy, or whatever quarks and stuff there may be.