If there's one thing that stops a great number of people from realizing their dream career (or anything else worthwhile in life), it is lack of belief in themselves.
But to understand how this works, it's important to look at the "technical" details.
Let's take the example of a person who wants to become a millionaire. His DESIRE is to become a millionaire. However, whether he becomes a millionaire or not depends on his BELIEF. To be more specific, it depends on whether he believes himself to be a millionaire.
In other words, who he believes himself to be is the "stuff" with which he has to work in order to shape himself into a millionaire. If he doesn't have the "stuff", he simply cannot become a millionaire, in the same way that a sculptor, no matter how talented, cannot create a work of art without clay to work with.
In the example above, a man may DESIRE to become a millionaire, but if his BELIEF about himself is not aligned with this DESIRE, then it is simply impossible for him ever to become a millionaire.
This is not an unproven metaphysical technique or some fancy doctrine. It has been proven time and again by greatly successful people, such as IBM founder Thomas Watson.
He always advised his people to imagine the ideal person they wanted to become five years from now, and to start TODAY to think, speak, act and even get dressed like that ideal person.
This sounds easy enough, yet it is not. It requires that you "erase" your personal history and start to make radical changes in the way you think, act and behave. Only by changing the way you think, act and behave will your self-concept begin to align with your desire. You will then be able to become the person you want to
be.