3 When, then, it came to pass in the secret design of God's providence that We were chosen to fill this Chair of St. Peter and to take the place of the Person of Christ Himself in the Church, worried by the enormous burden of the office and finding no ground for reliance upon Our own strength, We hastened with fervent zeal to implore the divine aid through the maternal intercession of the ever blessed Virgin. Never has Our hope, We are happy to acknowledge, at any time of Our life but more especially since We began to exercise the Supreme Apostolate, failed in the course of events to bear fruit or bring Us comfort. Thus encouraged, Our hope today mounts more confidently than ever to beseech many more and even greater blessings through her favor and mediation, which will profit alike the salvation of Christ's flock and the happy increase of His Church's glory.
Source: Magnae Dei Matris (Vatican.va)