[Somewhat relevant. She only just manages to bite back an "easy for you to say".]
I'm aware of what confidence can do, but... [Her parents always believed she could learn to control it. She believed her parents - that's almost the same thing as having self-confidence. And still, she could never manage it. She's a failure who let her parents down.]
What experience do you have to tell it's as simple as believing? [...] Do you have powers?