4 This was properly interpreted by the faithful, who from all nations, and almost countless in number, flocked in pious pilgrimage to the grotto of Lourdes, aroused their Faith, enkindled their devotion and strove to conform their lives to the Christian precept. There also miraculous favors were granted them, which excited the admiration of all, and confirmed that the Catholic religion is the only one given approval by God.
Source: Fulgens Corona (Vatican.va)