I used to (and still do a little bit) that I was the only person who actually existed. That everyone else was just an illusion in my mind and that my whole exsistence might just be a dream. I could actually be in a coma or something like that. Then the Matrix came out and made it worse.
A childhood belief about i'm different

others believed things like this
- when i was a kid, i used to believe i was actually a king who was in a coma dreaming about being a kid.— r
- I used to believe that a dream catcher really made nightmares go away.
— WOLVERINEfLASH14 - "Going to the jazz club in my mind"? Not me! "Going to Nebraska in my mind..."— Felix
- When I was little I would always say in my mind, "I know you can read my mind", just in caseAnon
- The first time I saw a black person (I was about 3), I thought he was made of chocolate.— Ronne
- I used to believe that the closer it was to Sunday, the worse your sins were.— heathen