How does something that most of the time is just an unfounded state of mind have so much control?
First off let's have a look at the ways fear controls you:
Fear can hold you back from taking action in several ways:

1. Paralysis: Fear can immobilize you, making it difficult to even start the action. It can cause you to overthink, doubt yourself, and become stuck in a state of inaction.
2. Read more at https://xlr8life.com/how-does-fear-control-you