Humility is the greatest virtue in the spiritual life, the virtue which unlocks the graces of the Sacred Heart of Jesus and the Immaculate Heart of Mary. It is the virtue by which we reach Heaven. It is the virtue Our Lord prized, for He is the greatest instructor of humility: "Learn of me, because I am meek and humble of heart" (Matt. 11:29). In this marvelous work, Pope Leo XIII sets forth sixty counsels, little reflections,...