The author reflects on the traditional hierarchy of sacred music taught by St. Pius X and his successors and by the Second Vatican Council. He shares that the hierarchy of sacred music places Gregorian chant first, followed by classical polyphony, then organ music, choral music, vernacular hymns, and then instrumental music. He elaborates on the psychology of liturgical music addressed by William F. Pohl. He also stresses the role of church musicians in music's contemplative effects.