Tanner uses Kierkegaard's thought, in particular his theory of anxiety, to enrich a bold new reading of Milton's Paradise Lost. He argues that for Milton and Kierkegaard, the path to sin and to salvation lies through anxiety, and that both writers include anxiety within the compass of paradise. The first half of the book explores anxiety in Eden before the Fall, original sin, the aetiology of evil, and prelapsarian knowledge. The second half examines anxiety after the Fall, offering original insights into such issues as the demonic personality, remorse, despair, and faith.