Controversies surrounding the recent Extraordinary Synod of Bishops on the Family have put me in mind of Blessed John Henry Newman, the greatest Catholic churchman of the 19th century.
Newman wrote eloquently on many topics, but the arguments around the synod compel us to look at his work regarding the evolution of doctrine.
The development of doctrine
When he was at mid-career and in the process of converting from Anglicanism to Roman Catholicism, Newman penned a masterpiece entitled On the Development of Christian Doctrine.