In Praeclara Summorum §11

¹¹ And you, beloved children, whose lot it is to promote learning under the magisterium of the Church, continue as you are doing to love and tend the noble poet whom We do not hesitate to call the most eloquent singer of the Christian idea. The more profit you draw from study of him the higher will be your culture, irradiated by the splendours of truth, and the stronger and more spontaneous your devotion to the Catholic Faith. As pledge of celestial favours and witness of Our paternal benevolence we impart to you, beloved children, with all Our heart, the Apostolic benediction. Given at Rome at St. Peter's, April 30, 1921, the seventh year of Our Pontificate.