Since the Enlightenment of the eighteenth century, and Darwin, Christian belief in the West has progressively declined. Are we to take the fact that it is atheist, or agnostic, scientists who in many ways have made the modern world as proof that Christianity (or any other kind of religion) is discredited, indeed always was nothing more than a superstitious delusion? Yet there are other parts of the world where Christianity is thriving. And even in the West itself there are still people, by no means stupid or deluded, who have not abandoned a faith whose strengthening power is proof to them of its truth. In this book Guy Blythman − a believer, but one who knows that strongly held convictions should be subject to rational enquiry − shows that it is not a sign of mental illness, that it is not incompatible with reason and science and may even be justified by them, and that it is as relevant today as it ever was.