Here's another quote from "The Hero with a Thousand Faces," page 51 that helps to explain the "call."
"But whether small or great, and no matter what the stage or grade of life, the call rings up the curtain, always, on a passage, which, when complete, amounts to a dying and a birth. The familiar life horizon has been outgrown; the old concepts, ideals, and emotional patterns no longer fit; the time for the passing of a threshold is at hand."
Now just as an aside, I want to say that in most of the retelling of the mythological hero where there are two characters they are in reality one. They become the Yin and Yang, the duality of male / female, light / dark, cold / hot, etc. So it is with Rocky and Charlie. Even though I wrote the story with the two adolescent characters, they are really one in the same.
So in Chapter Five, The Otherworld, Charlie hears the voices, the call. It is not until Chapter Fourteen, The Compass and the Key, however, that he really understand what is happening. His mom, Margaret, fills in the blanks for her son. Charlie then accepts the call. The acceptance, of course, is key. The hero could refuse and the hero's journey basically stops right there.
In Chapter Fourteen, Margaret does some things that follow along with the hero's journey, but more on that latter. My next post will talk about crossing the threshold (the Threshold of Adventure.)