Eventually you come to a place where you can’t go on and you can’t go back. You have arrived at the base of cliffs; you can’t scale them, you can’t get around them, and there’s no handy tunnel through them. The Japanese teacher Hakuin called this the Silver Cliffs and Iron Mountains. It’s a daunting place—that’s the point of it. And when you arrive here your life and your journey can become your own.