Why do we pretend not to believe things we have actually experienced. You know. When someone who does something contrary to what they normally do. Doing something kind for someone when they are the tough guy on the block. That sort of thing.
We will find any excuse or reason to tell anyone else why we acted that way and dismiss it as a momentary blip in our life. We say to ourselves that is not me whenever it conflicts with our image.
The image we construct is the fiction and it is our actions that bare our truths to ourselves. When we do something that we don't normally do then we need to stop denying it and search for what it means for us. Determine what it is telling us about ourselves to reach a deeper understanding of ourselves.
This is the hero's quest. For a lot of people it is truly an exploration of the unknown.