Oddly, most of it is based upon dealing with the inevitable fact that no matter what happens, death is certain. This is a topic we avoid because it makes us uncormfortable, but it is the avoidance of it that causes discomfort. To a certain degree, what we are doing, or should be doing on this earth, is trying to prepare for a dignified death. It is natural to default to a life that is frivolously allowed to pass by, considering that, after all, we know our final fate. The problem is, fear is what causes anxiety.
Anxiety cripples our power.
So, now you have to conquer fear. With all of the uncertainty in life, many are caught in the grips of anxiety from an early age, and their lives revolve around their fears. Our lifes are structured around what we are afraid of instead of focused upon who we are supposed to become. Beliefs are passed down from generation to generation. So, too, is the anxiety of humanity.