49 Lastly, the real value of the Bible is for our preaching - if the latter is to be fruitful. On this point it is a pleasure to illustrate from Jerome what we ourselves said in our Encyclical on "preaching the Word of God," entitled Humani generis . How insistently Jerome urges on priests assiduous reading of the Bible if they would worthily teach and preach! Their words will have neither value nor weight nor any power to touch men's souls save in proportion as they are "informed" by Holy Scripture: "Let a priest's speech be seasoned with the Bible," for "the Scriptures are a trumpet that stirs us with a mighty voice and penetrates to the soul of them that believe," and "nothing so strikes home as an example taken from the Bible."
Source: Spiritus Paraclitus (Vatican.va)