18 Let it be understood, therefore, that this devotion of Catholics to comfort and elevate the mass of the people is in keeping with the spirit of the Church and is most conformable to the examples which the Church has always held up for imitation. It matters very little whether it goes under the name of the Popular Christian Movement or Christian Democracy, if the instructions that have been given by Us be fully carried out with fitting obedience. But it is of the greatest importance that Catholics should be one in mind, will, and action in a matter of such great moment. And it is also of importance that the influence of these undertakings should be extended by the multiplication of men and means devoted to the same object.
Source: Graves de Communi Re (Vatican.va)