Notice how the meaning of your original statement becomes
   somewhat more clear with substitution to a root meaning:

   Taking a walk without knowing where you are going to end up when
   you are finished walking is truly one of the scariest things of
   all. " If I had to shorten it, it is fear of walking in the
   dark. You don't know what you will find. Vagueness also has an
   aspect of darkness to it. Wandering around in the dark woods and
   you don't know what you will find until you find it.. or what
   will find you.