I think if you just demonstrate something in front of someone or something

Anything

You cannot see yourself through the mirror, most people don't get used to look at the mirror.

True. 

    You are not confident, every interview questions say that.

    You don't know what you good at, or presenting at.

    You don't know what you dress was not your mother's born nature, to say, you growing up private school, or not.

    You don't have a talent, to say among the peers, there are some other better ones, family statues, with the money, in child bring up Years experience starting young.

    Your brain naturally dead. = Zero.

    True

Through some human looks, or somewhere, there are networks or community, you become what you become in the photo

    You say confident

    You say belief

    You do say you believe in it.

    True. With whole heart and soul. No one demonstrate you if you don't deliver that standards meaning they get hurt.

    That is not necessary a forever case, not really.