A beloved modern-day saint, St. Teresa of Calcutta continues to be a source of inspiration over twenty years after her death. We now know that she endured in inner torment throughout most of her life--a suffering she spoke of only to her spiritual advisors. In fact, she said that "If I ever become a saint--I will surely be one of 'darkness.'" In this new book, Fr. Raniero Cantalamessa, preacher to the Papal Household for over 30 years, reflects on the spirituality of this great saint, and how she gave God her complete fiat, her yes. Despite being misunderstood and ridiculed at first, she dared to believe the words of Jesus and, in so doing, founded the most well-known religious organization in the world.