82 "If I preach the Gospel, I have therein no ground for boasting, since I am under constraint. For woe to me if I do not preach the Gospel!" Why should We not apply these earnest admonitions to Ourselves, that is, to the Vicar of Jesus Christ, who by reason of his apostolic office has been appointed "a preacher and apostle . . . a teacher of the Gentiles in faith and truth"? Therefore, as We invoke upon the Catholic missions the twofold patronage of St. Francis Xavier and St. Therese of the Child Jesus, the protection of all holy Martyrs, and the powerful maternal help of the Mother of God, the Virgin Mary, Queen of the Apostles, it is Our pleasure to repeat to the Church the victorious words of her Divine Founder: "Put out into the deep."
Source: Fidei Donum (Vatican.va)