Ad Beatissimi Apostolorum §20

²⁰ Well, indeed, has Our Predecessor merited of the Church, and grateful posterity will preserve the memory of his deeds. As, however, by God's permission, the field of "the good man of the house" is ever exposed to the evil practices of "the enemy," it will never come to pass that no work will be necessary to prevent the growth of "the cockle" from damaging the good harvest; and applying to ourselves God's words to the prophet: "Lo, I have set thee this day over the nations and over kingdoms, to root up and to pull down . . . to build and to plant" ( Jerem . i. 10), it will be Our constant and strenuous endeavour, as far as it is in Our power, to prevent evil of every kind and to promote whatever is good, until it shall please the Prince of Pastors to demand an account of Our discharge of Our office.