Orthodoxy, as author G. K. Chesterton employs the term here, means "right opinion." In this, the masterpiece of his brilliant literary career, Chesterton applies the concept of correct reasoning to his acceptance of Christian faith. As he expresses it in his preface, "It is the purpose of the writer to attempt an explanation, not of whether the Christian Faith can be believed, but of how he personally has come to believe it. The book is therefore...