When will Moses know he has succeeded? When will the teacher know his pupils have absorbed the lesson? When will a rebbe know his people truly have digested all he poured into them? When the student wriggles and squirms and exclaims in exasperation, “If so, what am I doing here where I am? If so, why are any of us here? If so, this is a tight shell, a tiny cell! How long can we stay this way?!” “If so, why are my eyes blind to seeing this truth that envelops me? Why are my ears deaf to the symphony in which I myself...