21 The university students who are actively engaged in Catholic Action give Us great hope for a better future for Mexico, and We do not doubt that they will fulfil Our hopes. It is evident that they are a part, and an important part, of this Catholic Action which is so close to Our heart, whatever be the forms of its organization, since these depend in great part on local conditions and circumstances which vary from region to region. These university students not only afford, as We have said, the most valid hopes for a better tomorrow, but even today can render effective service to the Church and to the country, by the apostolate which they carry on among their companions as well as by supplying the various branches and various organizations of Catholic Action with capable and enlightened directors.
Source: Firmissimam Constantiam (Vatican.va)