People say "seeing is believing."
Biggest lie on the planet?
BELIEVING is SEEING. Because whatever you believe about yourself you will bring into reality. You do it everyday, but sometimes because beliefs trick the mind, we do it in a negative way.
So examine your negative beliefs, how you got them and determine if they are really true. And remember, whatever you're telling your \self as a reason why you Can't do things, think of other great men and women with the same or even more obstacles who accomplished great things in life.
We might have some negative belief about ourselves, not necessarily true but because we BELIEVE IT, we make it come to pass.
But if you create and sustain a Positive belief about yourself, you will also make it come to pass.