Giovanni Boccaccio - Leitch, Vincent B. ed. The Norton Anthology of Theory and Criticism. New York: Norton, 2001.

You must read, you must persevere, you must sit up nights, you must inquire, and exert the utmost power of your mind. If one way does not lead to the desired meaning, take another; if obstacles arise, then still another; until, if your strength holds out, you will find that clear which at first looked dark.

- Giovanni Boccaccio - Leitch, Vincent B. ed. The Norton Anthology of Theory and Criticism. New York: Norton, 2001.