45 If, then, St. Jerome begs for assiduous reading of the Bible by the faithful in general, he insists on it for those who are called to "bear the yoke of Christ" and preach His word. His words to Rusticus the monk apply to all clerics: So long as you are in your own country regard you cell as your orchard; there you can gather Scripture's various fruits and enjoy the pleasures it affords you. Always have a book in your hands and read it; learn the Psalter by heart; pray unceasingly; watch over your senses lest idle thoughts creep in. Similarly to Nepotian: Constantly read the Bible; in fact, have it always in your hands. Learn what you have got to teach. Get firm hold of that "faithful word that is according to doctrine, that you may be able to exhort in sound doctrine and convince the gainsayers." When reminding Paulinus of the lessons St. Paul gave to Timothy and Titus, and which he himself had derived from the Bible, Jerome says: A mere holy rusticity only avails the man himself; but however much a life so meritorious may serve to build up the Church of God, it does as much harm to the Church if it fails to "resist the gainsayer." Malachias the Prophet says, or rather the Lord says it by Malachias: "Ask for the Law from the priests." For it is the priest's duty to give an answer when asked about the Law. In Deuteronomy we read: "Ask thy father and he will tell thee; ask the priests and they will tell thee. . ." Daniel, too, at the close of his glorious vision, declares that "the just shall shine like stars and they that are learned as the brightness of the firmament." What a vast difference, then, between a righteous rusticity and a learned righteousness! The former likened to the stars; the latter to the heavens themselves! He writes ironically to Marcella about the "self-righteous lack of education" noticeable in some clerics, who "think that to be without culture and to be holy are the same thing, and who dub themselves 'disciples of the fisherman'; as though they were holy simply because ignorant!" Nor is it only the "uncultured" whom Jerome condemns. Learned clerics sin through ignorance of the Bible; therefore he demands of them an assiduous reading of the text.
Source: Spiritus Paraclitus (Vatican.va)