You are limited only by your thoughts.

Here's a story about George Dantzig - the famed mathematician who's
contributions to Operations Research and systems engineering have
made him immortal.

As a college student, George studied very hard and often late
into the night. So late, that he overslept one morning, arriving
20 minutes late for Prof. Neyman's class. He quickly copied
the two maths problems on the board, assuming they were
the homework assignment. It took him several days to work
through the two problems, but finally he had a breakthrough
and dropped the homework on Neyman's desk the next day.

Six weeks later, on a Sunday morning, George was awakened at
6 a.m. by his excited professor. Since George was late for class,
he hadn't heard the professor announce that the two unsolvable
equations on the board were mathematical mind-teasers that
even Einstein hadn't been able to answer. But George Dantzig,
working without any thoughts of limitation, had solved not one,
but two problems that had stumped mathematicians for
thousands of years.

Simply put, George solved the problems because
he didn't know he couldn't.

You are not limited to the life you now live. It has been accepted by
you as the best you can do at this moment. Any time you're ready
to go beyond the limitations currently in your life, you're capable of
doing that by choosing different thoughts. All you must do is figure
out how you can do it, not whether or not you can. And once you
have made your mind up to do it, it's amazing how your mind
begins to figure out how.

A person is limited only by the thoughts that he/she chooses.