Arthur Green, Your Word Is Fire. New York: Schocken Books, 1977, pp.15-16.
Any teaching that places such great emphasis on total concentration in prayer must . . . deal with the question of distraction. What is a person to do when alien thoughts enter his mind and lead him away from prayer? . . . The Ba’al Shem Tov . . . spoke against the attempts of his contemporaries to . . . do battle with distracting thoughts . . . He taught that each distraction may become a ladder by which one may ascend to a new level of devotion . . . God is present in that moment of distraction! And only he who truly knows that God is present in all things, including those thoughts he seeks to flee, can be a leader of prayer.