Divini Illius Magistri §21

²¹ Therefore with full right the Church promotes letters, science, art in so far as necessary or helpful to Christian education, in addition to her work for the salvation of souls: founding and maintaining schools and institutions adapted to every branch of learning and degree of culture. Nor may even physical culture, as it is called, be considered outside the range of her maternal supervision, for the reason that it also is a means which may help or harm Christian education.