How to discuss religion with believers?

[T0 Th3 M4X]

In this case maybe subjectively define what you would consider "success" or "failure."  Maybe also provide more detail about the subject so that others can understand what it is to you and your expectations for it.  The latter isn't necessary though, but could be helpful for feedback.

Fair dues. 

Success:  The book sells enough copies that I can finally afford that solid rhodium toilet seat I've been pining for all these years.  Spielberg options the film rights.

Failure: The book sells exactly one copy.  The purchaser is so disappointed that s/he hunts me down and beats me to death with my own book.

Subject:  For years, people have been eating leprechauns for breakfast.  The book examines how they can be used for brunches, suppers, late day snacks, and those intimate romantic dinners when burgers and chips just don't set the right mood.

Boru

I wouldn't say it's "foredoomed" if you see two distinct possibilities and one could lead to success for you.  More a question of risk, reward, and probability.

If I had to guess, and this is just me suggesting independently, it would probably not be either extreme. You would sell some copies, not get beaten to death, and maybe get a toilet seat that is "good enough."

As a writer, it's usually about the vision of the master.  We project what we feel, experience, or believe on to others.  If someone doesn't like it, then at least we tried.  If we inspired someone to understand us better, even in part, then that in itself is a success.  Most of the time we don't even know everyone who read our work, but we don't need to either.