'A book is bad not only when it contains impure and immoral thoughts, but when it gives false ideas, pretending to be the judge of everything, to ridicule everything sacred or honorable. These sorts of books are all the worse when they are beautifully written, as they generally are. They debase the taste, making healthy food seem disgusting....
'Forgive me for saying all this; but I know your passion for reading, and all I would venture to say to you is this: don't play with poison.'
St. Theophane Venard
Painting: Eduard von Grützner, in US public domain due to age