Orthodoxy is a book by G. K. Chesterton that has become a classic of Christian apologetics. Chesterton considered this book a companion to his other work, Heretics. In the book's preface Chesterton states the purpose is 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 developed as an intellectual quest by a spiritually curious person. While looking for the meaning of life he finds truth that uniquely fulfills human needs. This is the truth revealed in Christianity. Chesterton likens this discovery to...