I believe one of the scariest ways to move through this life is to do so living less than fully alive, too merely exist without direction or purpose, "...like a plastic bag drifting through the wind." To live life on default; never reaching your true potential, never becoming what you could have been.
Sadly this is the harsh reality so many settle into without ever really noticing until it's too late.
To live life constricted by confines of fear and mediocrity only to face a mountain of regret year after year; decade after decade as your biggest hopes and dreams slip further away.
To never have the courage to do more, be more and see more of what this magnificent life has to offer. To never shine bright living in your true purpose, to never make the difference only you can make in this world is a tragedy that only you can conquer.