TO PROTECT THE FAITH of the Catholic Church against errors arising from certain members of the Christian faithful, especially from among those dedicated to the various disciplines of sacred theology, we, whose principal duty is to confirm the brethren in the faith (Lk 22:32), consider it absolutely necessary to add to the existing texts of the Code of Canon Law and the Code of Canons of the Eastern Churches, new norms which expressly impose the obligation of upholding truths proposed in a definitive way by the Magisterium of the Church, and which also establish related canonical sanctions.