In his letter, Pope Francis notes how, “Every day, for over forty years, following Lauds [Morning Prayer]” he has “recited a prayer to Saint Joseph taken from a nineteenth-century French prayer book of the Congregation of the Sisters of Jesus and Mary.” This prayer, he says, expresses devotion and trust, and even poses a certain challenge to Saint Joseph,” on account of its closing words: “My beloved father, all my trust is in you. Let it not be said that I invoked you in vain, and since you can do everything with Jesus and Mary, show me that your goodness is as great as your power.”