Teaching is an instinctual art, mindful of potential, craving of realizations, a pausing, seamless process, where one rehearses constantly while acting, sits as a spectator at a play one directs, engages every part in order to keep the choices open and the shape alive for the student, so that the student may enter in, and begin to do what the teacher has done: make choices.
It breaks your heart. It is designed to break your heart. The game begins in spring, when everything else begins again, and it blossoms in the summer, filling the afternoons and evenings, and then as soon as the chill rains come, it stops and leaves you to face the fall alone.
Far better to think historically, to remember the lessons of the past. Thus, far better to conceive of power as consisting in part of the knowledge of when not to use all the power you have. Far better to be one who knows that if you reserve the power not to use all your power, you will lead others far more successfully and well.