The Apology of Origen in Reply to Celsus: A Chapter in the History of Apologetics is a book written by John Patrick. The book is about the defense of Christianity by the early church father Origen against the criticisms of the pagan philosopher Celsus. Origen's response to Celsus is considered to be one of the most important works in the history of Christian apologetics. The book provides a detailed analysis of the arguments made by Celsus and Origen's...