Whether you are writing a book, or starting a business, or attempting a seven-foot high jump, you must first believe that it is possible to do what you are about to do. Belief is more than a self-help buzzword; it is the starting place for nearly everything humans have ever attempted and accomplished. If I believe it is impossible to do something, I will not attempt it; if I believe it is possible, I might. In this way, belief is more important than evidence. Someone might show me evidence that it is possible to become, say, a successful writer. They might show me hundreds video interviews with writers who were themselves once upon a time nothing but young men and women who thought it would be cool to tell stories for a living. No matter how many videos I was shown, I could still choose to believe it impossible.
Likewise, someone could show me evidence that it is impossible to become a successful writer. They could quote statistics of how many writers try and fail, how many manuscripts are rejected by agents and publishers. They could tell me I have a better chance of winning the lottery and that to succeed I must be both lucky and talented. They could tell me all of this, and I could still choose to ignore that evidence and believe it possible.
I have lived most of my life taking my own belief and disbelief for granted. I had allowed the concept of belief to drift into the airy realm of superstition and desperation. Yet it is nothing less the foundation of my entire life, the only springboard from which any idea can launch. It has never been my job to accept reality, only to believe in the reality I wish to enjoy.
Write Within Yourself: An Author's Companion. "A book to keep nearby whenever your writer's spirit needs feeding." Deb Caletti.