Now recognized as one of the nineteenth century's leading psychologists and philosophers, Kierkegaard was among other things the harbinger of exisentialisim. In Fear and Trembling he explores the psychology of religion, addressing the question 'What is Faith?' in terms of the emotional and psychological relationship between the individual and God. But this difficult question is addressed in the most vivid terms, as Kierkegaard explores different ways of interpreting the ancient story of Abraham and Isaac to make his point. Søren Kierkegaard not only ­trans­formed Protestant theology but also anticipated twentieth-century existentialism and provided it with many of its motifs. Fear and Trembling and The Book on Adler-addressed to a general audience-have the imaginative excitement and intense personal appeal of the greatest literature. Only Plato and Nietzsche have matched Kierkegaard's ability to give ideas so compellingly vivid and dramatic a shape. Translated by Walter Lowrie