This book makes the compelling argument that Chaucer, the Perle-poet, and The Cloud of Unknowing author exploited analogue and metaphor for marking out the pedagogical gap between science and the imagination. These writers take up an Aristotelian confidence in reason as a proof model for works of the imagination. St. Augustine, too, had argued persuasively that we might well train ourselves "to discern in the light of reason what we] already hold...