Every trade or profession has its secrets.
Secret knowledge is not the kind you can find in books.
Instead, it’s the kind of knowledge that a tradesman or professional
might not admit to having -- to themselves or others.
Its the kind of knowledge that’s not talked about, not admitted,
perhaps not even known by most members of the trade or profession.
Someone outside the trade or profession can discover the
secret knowledge, but the knowledge comes at a steep price.
Usually one has to pay the professional for years of work.
Only after seeing the results, or the lack of results, and the
amount of money spent, can the outsider even begin to suspect that
something is not quite the way it should be.