Apologia Pro Vita Sua is a spiritual autobiography by John Henry Newman, which describes his journey from Anglican priest to Roman Catholic Cardinal, defending his beliefs and changes from accusations of dishonesty, focusing on the search for truth and the discovery of true Catholic teachings in the Church of England, which he considered to be deviant. The book was written in response to criticism and accusations from his former Anglican friends, who accused him of disloyalty and indecisiveness. Newman defended his intellectual and spiritual integrity, explaining the theological.