54 The fruits of such piety are manifest, the widespread diffusion and great activity of the apostolate which, by prayer, word of mouth, by the religious press, by personal example, by works of charity seeks in every way possible to lead souls to the Sacred Heart of Jesus and to restore to the same Sacred Heart His sovereign rule over the family and over society. We refer also to the holy battle waged on so many fronts to vindicate for the family and the Church the natural and divinely given rights which they possess over education and the school. Finally, We include among these fruits of piety that whole group of movements, organizations, and works so dear to Our fatherly heart which passes under the name of "Catholic Action," and in which We have been so intensely interested.
Source: Ubi Arcano Dei Consilio (Vatican.va)