What are you holding onto?

What are you afraid of? Anything? I recently finished reading the Divergent trilogy and also saw the movie.  If you haven't read the books or seen the movie, the city is divided into five groups or factions. At age 16, people are allowed to choose their faction. The main character, Tris, chose Dauntless, which means: not to be intimidated, fearless, intrepid, bold, daring, brave, courageous." This faction was known to be fearless and bold. One of the training tools used with initiates into Dauntless was fear simulations, where the person must face their fears in order to learn to overcome them. [...]