Belief is one of the key components to success - in any endeavor.
I would even go so far as to say that one of the reasons why today's society has so many "issues" is because the same rules that govern civilized society also tend to make people believe that they are only capable of certain things given certain circumstances.
The common belief that going to college is a natural extension of the educational process is a good demonstration of this. These days you have people who didn't even finish high school who are more successful than people who are in their 30's and 40's and still paying off student loans.
Anything is possible -as long as the
belief is there!