Called “the greatest saint of modern times” by Pope St. Pius X, Thérèse of Lisieux lived a hidden life in a Carmelite monastery and died at only twenty-four years old. Yet, her “secret” of sanctity has made her not only a great modern saint, but a Doctor of the Church. She promised to spend her Heaven helping those on earth. Her simple spirituality, humility, and complete trust in God revolutionized the twentieth century. Over 100 years after her death, she continues to inspire millions of people, help them in their lives, and draw them closer to God.