50 You know, Venerable Brethren, Bishops of Italy, from your pastoral experience that it is a grave and disastrous error to believe and to make believe that the work of the Church done by Catholic Action and through Catholic Action is superseded and made superfluous by the religious instruction given in the schools and by the presence of chaplains in the Associations of Youth of the [Fascist] party and of the regime. Both are certainly necessary. Without them the schools and the Associations would inevitably and quickly become, by logical and psychological necessity, pagan things. Necessary therefore they are; but they are not sufficient. As a matter of fact, by such religious instruction and such ecclesiastical assistance from the chaplains, the Church of Jesus Christ can develop only a minimum of her spiritual and supernatural effectiveness, and even this minimum is attained amid surroundings and in an environment which do not depend on the Church but are preoccupied by many other kinds of teaching matters and by many other exercises in obedience to immediate superiors who are often little or not at all favourably disposed to religion, and who sometimes exercise a directly contrary influence both by their words and by the example of their lives.
Source: Non Abbiamo Bisogno (Vatican.va)