Why should we care about the writings of the Church Fathers, or early Church history? Consider the Church of the early 100s. Protestants typically (a) reject the doctrine of the Real Presence of Christ, that the Eucharist becomes His Flesh and Blood; and (b) believe that once you are saved, you’ll never permanently fall away from the faith. But holding these views would require believing that the very same Symrnaean and Ephesian Christians praised by Christ in 96 A.D. are heretics by 107 A.D.