“I have an apple that thinks it is a pear,” she said, holding it up. “And a bun that thinks it is a cat. And a lettuce that thinks it is a lettuce.”
It is a clever lettuce then.”
“Hardly,” she said with a delicate snort. “Why would anything clever think it was a lettuce?”
“Even if it is a lettuce?” I asked.
“Especially then,” she said. “Bad enough to be a lettuce. How awful to think you are a lettuce too.“

– Patrick Rothfuss, The Wise man’s fear

It is often more important who we think we are than what we actually are. What we think we are will give our brain a focus and the confirmation bias in our mind will find the events in our lives that confirm our belief. So what do you think you are?