For, on the one hand, there is the real world, and on the other,
    a whole system of symbols about that world which we have in our minds.
    These are very very useful symbols; all civilization depends on them;
    but like all good things they have their disadvantages, and the
    principle disadvantage of symbols is that we confuse them with reality,
    just as we confuse money with actual wealth; and our names about
    ourselves, our ideas of ourselves, our images of ourselves, *with*
    ourselves.

    Now of course, reality, from a philosopher's point of view, is a
    dangerous word. A philosopher will ask me, what do I mean by reality?
    Am I talking about the physical world of nature, or am I talking about
    a spiritual world, or what?
    
    And to that I have a very simple answer. When we talk about the material
    world, that is actually a philosophical concept - so in the same way, if
    I say that reality is spiritual, that's also a philosophical concept -
    and reality itself is not a concept.

    Reality is - [...]

    ... and we won't give it a name.

See also: "the TAO that can be named is not the true TAO;" or, Crowley in Konx om Pax on the "fools who mistake names for things."