Didascalicon, Book V: the senses of Scripture and the three kinds of readers
Chapter VI. What is the fruit of divine reading
Whoever comes to be instructed in divine reading, let him first know what its fruit is. For nothing ought to be desired without cause, nor does a thing draw desires which promises no usefulness. The fruit of divine reading is twofold: that it delights the mind to know, and that it is expedient to be helped. Of these, the one, that is knowledge, looks more to history and allegory; the other, that is the training of morals, looks more to tropology. All divine Scripture is referred to this end. Although it is expedient for anyone to be more just than wise, I know that more seek in the study of the sacred utterance knowledge than virtue. But since I censure neither, and judge both necessary and laudable, I will dispose in few words what suits the intention of each. And first I will speak of him who embraces the grace of morality.