3 Many, it is true, lament the fact that until now these hopes have been unfulfilled, and are prone to repeat the words of Jeremias: "We looked for peace and no good came; for a time of healing, and beheld fear" ( Jer . viii., 15). But all such will be certainly rebuked as "men of little faith," who make no effort to penetrate the works of God or to estimate them in the light of truth. For who can number the secret gifts of grace which God has bestowed upon His Church through the intercession of the Blessed Virgin throughout this period? And even overlooking these gifts, what is to be said of the Vatican Council so opportunely convoked; or of the dogma of Papal Infallibility so suitably proclaimed to meet the errors that were about to arise; or, finally, of that new and unprecedented fervor with which the faithful of all classes and of every nation have long been flocking to venerate in person the Vicar of Christ? Surely the Providence of God has shown itself admirable in Our two predecessors, Pius and Leo, who ruled the Church in most turbulent times with such great holiness through a length of Pontificate conceded to no other before them. Then, again, no sooner had Pius IX, proclaimed as a dogma of Catholic faith the exemption of Mary from the original stain, than the Virgin herself began in Lourdes those wonderful manifestations, followed by the vast and magnificent movements which have produced those two temples dedicated to the Immaculate Mother, where the prodigies which still continue to take place through her intercession furnish splendid arguments against the incredulity of our days.
Source: Ad Diem Illum Laetissimum (Vatican.va)