Fear can paralyze or energize us. It's called the flight or fight effect. But the fear of fear—of sudden terror—is a bottomless pit. There's no end to it. It doesn't paralyze, it puts a person in a comatose emotional and mental state.
A fear of sudden terror is understandable for war-torn regions of the world and for people living under an oppressive government. In those situations, a general fear for one's life is realistic, but it's not for those of us who live in nations with some form of democracy or representative government.