As a life coach, I focus on the zillions of ways fear keeps people stuck. I am not talking about fear of the dark, fear of nuclear war or fear of falling. These are indeed a few of the life-preserving fears that we do well to heed. Here is another one: When I was 3 or 4 years old I was afraid of what was under my bed when the lights went out at bedtime. I consider that fear absolutely rational and reasonable. There is nothing you can say to change my mind.
I am, however, talking about the emotional fears of not being perfect, loved, or strong enough. I am talking about the fear that clouds our visions, and deflates our enthusiasm thereby keeping us immobilized. The fear of public speaking could easily be on this list.