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.
