Lillie said:
It may be immaterial in the wider sense, but I would point out that, as your quote shows, Crowley felt the need to at least tell people where they stood.
It's why they put 'May contain traces of nuts' on everything. So people know where they stand and can make their decisions accordingly.
Crowley was not originating these things but plagarizing them. In this quote, he was telling people what to do with works that had already been created by others under possibly false pretenses as to their source.
Under this reasoning, are you saying that if I plagarized Redfield's work with "fiction" blazoned across the cover, then it is worth considering as containing something of value, yet, if "fiction" is
only mentioned on the copyright page, all its content is automatically invalidated because it was not clearly labeled.
If you want to eschew all materials that were originally deceptively presented as real (i.e., physical mundane world real) but weren't, then you'll have to ignore all the original Golden Dawn material. The GD was based on a deliberate lie concerning its founding and the source of the GD rituals & tarot structure—which lie, in fact, precipitated it's breakup in 1900. (Read my book,
Women of the Golden Dawn: Rebels and Priestesses.)
People now know about the lie and yet many still choose to work with the GD material because they find it valuable, despite the lie. And now-a-days people can easily find out about
The Celestine Prophecy. People are well-served to learn some critical reading skills rather than accepting everything at face value. (I used to teach classes at a college in how to become an "active," critical reader—a very useful skill in this flawed world.)