Fear is the biggest reason why people don't chase after their dreams.
The truth is, fear is always going to be there so we might as well learn how to deal with it now. At the end of life, people regret the things they didn't do far more than the things they did. The presence of fear marks that we are on the right path. It is the number one reason why most people quit and the exact reason why we shouldn't.
Book referenced:
The Kybalion written by THREE INITIATES