Fear, anger, and resentment cause the alcoholic (and probably everyone else) the most trouble. It is for this reason that the Big Book suggests we start our 4th Step inventory by examining these emotions.
Fear and anger are said to be primal, protective emotions. They are considered the twin sides of a fight-or-flight response built into our nervous system to ensure our physical survival. When triggered, it automatically generates a defensive reaction. Faced with a threat, we seek to protect ourselves either by fighting back or finding safety. Anger fuels the attack, fear the retreat.
Fear exists because danger exists. Danger is an objective fact of life. It is real. Fear alerts us to the possible existence of peril and enables us to defend ourselves against potential harm. It is a necessary internal alarm system.
Thus when AA tells us that our goal is to be free from fear, it is not suggesting that we will cease to experience fear. What it is suggesting is that we can be free from a certain kind of fear, the fear which is “an evil and corroding thread” (Big Book, p. 67) running through human existence. This is “self-centered fear,” a fear, says the 12&12 (S7, p. 76), that revolves primarily around loss and failure: fear of losing what we have or not being able to get what we want.