Finally, this industrious zeal must be illuminated by the light of wisdom and discipline and inflamed by the fire of charity. Whoever sets before himself his own sanctification and that of other people must be equipped with solid learning that comprises not only theology but also the results of modern science and discovery so that, like a good father, he may draw “from his storeroom things new and old”68Cf. Matth., XIII, 52. and make his ministry always more appreciated and fruitful. In the first place, let your activities be inspired by and remain faithful to the prescriptions of this Apostolic See and the directives of the Bishops. May it never happen, beloved sons, that those new forms and methods of the apostolate, so opportune today especially in regions where the clergy is not sufficiently numerous, remain dead or, through poor direction, not correspond to the needs of the faithful.
May your zeal increase every day, therefore, sustain the Church of God, be an example to the faithful, and constitute a powerful bulwark against which the assaults of the enemies of God may be broken.