The popularity of radio for purposes of instruction and entertainment is a remarkable phenomenon, the full significance of which we have hardly yet grasped. Spiritual Radio is vindicating the work of the great mystics of Christian history; it is demonstrating that the "Interior Life" is not limited to the seclusion of the cloister, but produces a robust type of Christian manhood and womanhood that makes for leadership and achievement in the marvelous age in which our lot is cast.