Perception of who you are
I have this idea/theory that it doesn't matter what you think of yourself, it only matters what other people think of you, like for instance, if you thought you were an ENTP but 10 other people thought you were an INFJ, you would actually be an INFJ. I don't think it's even possible for a person's first person perspective of him/her self to be accurate, I think you can only know who you are based on how other people see you. I'm not saying everyone else's perception of you is accurate, but that's why you need to be discerning and have a good memory, to be able to separate the accurate perceptions of others from the inaccurate perceptions of others. Obviously this means I think solipsism is nonsense.
"The worms will live in every host
It's hard to pick which ones they eat the most" - Marilyn Manson