Fear is a biological response. The fearful stimuli tells our amygdala to release adrenaline (our “fight or flight” hormone). The sole purpose of this is to give us energy to fight or flee. In other words, its purpose is to get us to act, once we act, the fear is pointless. And, usually goes away, since acting has us feeling empowered, not so out of control. Our focus becomes on our tasks at hand, and the worry get relegated to the background.