If you have enough people sitting around telling you you're wonderful, then you start believing you're fabulous, then someone tells you you stink and you believe that too! ↗
The superpowers often behave like two heavily armed blind men feeling their way around a room, each believing himself in mortal peril from the other, whom he assumes to have perfect vision. ↗
I've always thought that it's good to watch the news to find out what everybody else is looking at and believing, if only because that's how consensus is constructed. ↗
To get a child's trust - you may know or not - is a very hard thing to do. They're so used to not believing adults - because adults tell tales and lies all the time. ↗