Catholic response to Protestantism Some of the doctrines of Protestantism that the Catholic Church considers heretical are the belief that the Bible is the only supremely authoritative source and rule of faith and practice in Christianity (sola scriptura), that only by faith alone can anyone ever accept the grace of salvation and not by following God's commandments (sola fide), and that the only Christian priesthood can be a universal priesthood of all believers. See also Catholic teachings on heresy History of Christianity Infallibility of the Church List of movements declared heretical by the Catholic Church List of people burned as heretics Pelagius Diversity in early Christian theology Notes References Citations Sources Further reading Latinovic, Vladimir (2020). Who Do You Call a Heretic? Fluid Notions of Orthodoxy and Heresy in Late Antiquity. Palgrave. . Christian terminology