What am I? I am a creature wanting to better myself and have things better for myself. Is that what I am, or is that a story about what I am? Is there a difference between the story of what I am and the reality of what I am?
If what I am is the story, then it would follow that by changing the story I change what I am. Thus, eating a pear instead of a peach would change my body chemistry to some extent, and I would be a different person than if I ate the peach. I would be a different person if I drove the longer route to work. Different by thinking new thoughts. By marrying someone else. By becoming ill.