21 Through the intercession, therefore, of the most Holy Virgin, the August Mother of the Incarnate Word Himself, and the Queen of the Apostles, may Jesus Christ the merciful and everlasting Shepherd of souls vouchsafe to look down with favor on His flock, fill the clergy with the apostolic spirit, and grant that there may be many who will strive eagerly "to present themselves approved unto God workmen that needeth not to be ashamed, rightly handling the word of truth." [II Tim . ii:15]
Source: Humani Generis Redemptionem (Vatican.va)