The works of many early critics of the Christian church were burned by ruling emperors or otherwise destroyed in the second and third centuries, but the writings of the Greek pagan philosopher, Celsus, have survived indirectly through his eloquent opponent Origen of Alexandria. In his apologetical treatise, Contra Celsum, Origen argues against the ideas set forth by Celsus and quotes from Celsus' The True Doctrine at length. Through this treatise,...