Some people use fear to control their children, their less than loved ones, their audience - to even make themselves stay awake, attend a function or do something they would really rather not.
Fear, a motivator, but not a good one. Kind of a last resort in my life - having fears, spreading fears and responding to fears. I have to respond to my wife's fears, or pretend I did.
The fears I have are much fewer now, and some are just made up to stir conversations and thoughts of the clueless. Some will keep me hibernating until the Spring. They all start with a thought, which can build rapidly and become consuming.