11 And since We know that you are already working in this direction, We express to you Our satisfaction that you have already scrupulously selected and carefully formed good collaborators, who with word and example will bring the fervor of the Christian life and the Christian apostolate into the dioceses and the parishes. This, your work, will certainly succeed in being solid and deep, averse to publicity, tumult, noisy forms, working in silence, even without very apparent or immediate fruit; after the manner of the seed, which, in the apparent repose beneath the soil, prepares the new vigorous plant.
Source: Firmissimam Constantiam (Vatican.va)