#34 a “….. Before we proceed any farther it is necessary we spend some time in answering objections which may probably be made against the principles we have hitherto laid down.
#34 b “….To all which, and whatever else of the same sort may be objected, I answer, that by the principles premised we are not deprived of any one thing in nature. Whatever we see, feel, hear, or anywise conceive or understand remains as secure as ever, and is as real as ever.
#37 “….The philosophic, not the vulgar, substance, taken away.--I will be urged that this much at least is true, to wit, that we take away all corporeal substances. To this my answer is, that if the word substance be taken in the vulgar sense--for a combination of sensible qualities, such as extension, solidity, weight, and the like--this we cannot be accused of taking away: but if it be taken in a philosophic sense--for the support of accidents or qualities without the mind--then indeed I acknowledge that we take it away, if one may be said to take away that which never had any existence, not even in the imagination.
#33 “…. The ideas imprinted on the senses by the Author of Nature are called real things; and those excited in the imagination being less regular, vivid, and constant, are more properly termed ideas, or images of things, which they copy and represent. But then our sensations, be they never so vivid and distinct, are nevertheless ideas, that is, they exist in the mind, or are perceived by it, as truly as the ideas of its own framing. The ideas of sense are allowed to have more reality in them, that is, to be more (1) strong, (2) orderly, and (3) coherent than the creatures of the mind; but this is no argument that they exist without the mind. They are also (4) less dependent on the spirit, or thinking substance, which perceives them, in that they are excited by the will of another and more powerful spirit; yet still they are IDEAS, and certainly no IDEA, whether faint or strong, can exist otherwise than in a mind perceiving it….”
#9 “…..The philosophical notion of matter involves a contradiction.--Some there are who make a distinction betwixt primary and secondary qualities. By the former they mean extension, figure, motion, rest, solidity or impenetrability, and number; by the latter they denote all other sensible qualities, as colours, sounds, tastes, and so forth. The ideas we have of these they acknowledge not to be the resemblances of anything existing without the mind, or unperceived, but they will have our ideas of the primary qualities to be patterns or images of things which exist without the mind, in an unthinking substance which they call matter. By matter, therefore, we are to understand an inert, senseless substance, in which extension, figure, and motion do actually subsist. But it is evident from what we have already shown, that extension, figure, and motion are only ideas existing in the mind, and that an idea can be like nothing but another idea, and that consequently neither they nor their archetypes can exist in an unperceiving substance. Hence, it is plain that the very notion of what is called matter or corporeal substance, involves a contradiction in it….”
(A Treatise Concerning the Principles of Human Knowledge, Sec 1, Of the Principles…., 1710, in
https://www.gutenberg.org/files/4723/4723-h/4723-h.htm)
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First…cherry-picked, I know. I picked out what I thought most related to the OP’s query. There’s a veritable plethora of mitigating textual relevance the cherry-picking avoids, hopefully not so much as to show I missed the point completely.
Johnson, following fellow British empiricist Locke, used the primary qualities of things in order to refute the validity of mere ideas as resemblances of them, re: ideas cannot fracture a toe. But in doing that, insofar as,
e.g., solidity in things is necessary for fracturing toes, he did nothing to prove such primary qualities were existents in things, the absence from which it follows, that such primary qualities remain mere ideas in the mind of the mediating perceiver, in accordance with Berkeley’s considered metaphysical thesis, in opposition to Locke.
If you can’t prove primary perceptible qualities in us are not ideas in an immediate principal perceiver, perhaps it can be argued…….what difference would it make to the human perceiving mind, if they were not? Was the idea of measurable distance implanted in my head as an idea belonging to some sort of prevalent, re: un-constructed, spirit, or does the idea belong to me alone, as a mere distinction in relative spaces?
Sapere aude anyone?