You are but an appearance, and not absolutely the thing you appear to be.
From the perspective of mere representation, the external world always remains only a phenomenon.
Oh, I’m not a Berkeleian. I believe my back’s against this wall. I believe there’s a sten gun over there.
Sense data are much more controversial than qualia, because they are associated with a controversial theory of perception - that one perceives the world by perceiving one's sense-data, or something like that.
Einstein said, if everything exists as a substance of qualities, and qualities exist only in mind, then all is mind.
What we call ideology is precisely the confusion of linguistic with natural reality, of reference with phenomenalism
Berkeley retains the merit of having shown that the existence of matter is capable of being denied without absurdity.
Bodies do not produce sensations, but complexes of elements (complexes of sensations) make up bodies.
The material universe exists only in the mind.