I just wanted to talk a little about the betrayal. It is first mentioned in the prologue, of course, but is referenced throughout Book One. When I write about this, I am simply going to put this in the context of the "cosmology" of Medelia. I will refer to this in no other way. Now in general terms, I have made a decision to give the reader the author's insights into many of the thoughts and decisions that went into the writing of Book One, "In the Beginning." I plan to do this with the remaining books as well.
In keeping with that, I'll give you my thoughts with reference to the betrayal. First mention of the betrayal comes in the second page of the prologue. Orbenos, one of the seven creators, falls in love with the beings of higher reason and is unable to resist his desire to visit Medelia. He breaks his two promises to the One Outside the Seven and whispers his name and role in creation to Thomas Hunter from the kingdom of Moriand. Thomas thinks it over and in the end believes the apparition. The deal is done.
So what is happening here and why is this such a "betrayal?" Well in short, this is a replay of the "fall of man" scenario. Again, I will seek to avoid any mention of race, creed, national origin, religion, etc. when talking about the Chronicles. So from a pure cosmology of Medelia frame work, this is the moment that the creation of the world of humans changes from a state of perfect harmony. Medelia then becomes - what ? - it becomes what the reader finds at the opening of Book One (and I will let you choose your own words and opinions as what that might be.
However, there are a few points that I want to mention here and this is in keeping with why the author feels what Orbenos did was such a "betrayal." When Orbenos whispered his name and role in creation and Thomas chose to believe him, something happens here. The point the author is trying to make, is that prior to this time in the world of humans, Medelia believed in one basic principal (their cosmology) The principal was that their thoughts, together with their emotions) - their intentions - dictated how they saw he world. In other words, there was no belief in limitation from the "outer. " After the betrayal, that thought doesn't really go away but........what is added is this. The world of humans now is free to choose whether the "world" - the outer - is in control of their thoughts (how their day will go, how their life will go, etc. or they may choose to still believe that the "inner" - their own thoughts - mold and shape their destiny.
I try to sneak this in under he guise of Orbenos telling his name and role in creation and Thomas agreeing to or believing Orbenos. So when Orbenos whispers his name and role in creation, he is betraying the world of humans because he is introducing the first part of the "fall of man" scenario. He is in essence tempting Thomas to "believe him." He is tempting Thomas to believe in limitation. He is baiting Thomas to agree with him that the apparition he sees is one of the creators and that that creator, Orbenos, created the humans. (belief in the outer)
Thomas thinks it over and in the end allows himself to be taken in by Orbenos. He now believes his reality is the "outer"....if that makes sense to you? After the betrayal then, to put it one way, the world of humans now must decide whether their reality is the outer - and thus has control over their lives - or are they going to still believe that their destiny is controlled by their own thoughts and the emotions attached to those thoughts. At the start of Book One, the reader finds out that all is not well in Medelia and one way to understand this is in terms of the betrayal - that at least some of the humans have decided to believe in limitation, that their own thoughts (and these thoughts are / were not always good thoughts) shape their lives.
So when Orbenos falls in love with the world of the humans and travels to Medelia, he betrays the humans because he knows better !! He is aware of this principal and he knows that if Thomas buys into this - that the "fall of man" will occur. It will be the end of a perfect world. That is why it is a betrayal and why Medelia soon falls into darkness !!! If that makes any sense?