It is easy to express the wish to become an instrument in the hands of the Divine but hard to become one in actuality. Countless pious persons say countless times, "Thy will be done," but they seldom do it. They are not to blame, however. For they are ignorant of the fact that before their words can get any real meaning, they themselves must pass through a discipline, a preparation, a self-development, and a balancing-up.
-- Notebooks Category 2: Overview of Practicies Involved > Chapter 5: Balance the Psyche > # 73