"No poison is more fatal to youth than bad literature. More than ever today, [bad] books are to be feared because of their abundance and disguise. If you value your soul, do not read them unless you have you confessor's approval or the advice of other learned, pious persons. I repeat--learned and pious."
"Above all, avoid bad reading. If a book, indifferent in itself, should upset you, put it away. Willingly read good books, preferably those which treat of Mary and of the Blessed Sacrament."