Caution: The following scriptures and commentaries are heretical. Reading or studying heretical documents, for the purpose of debate, academic research, or to understand what other groups believe is not formal heresy. It is generally not considered sinful, provided the Catholic reader maintains their commitment to the true faith. The danger is that reading and studying such documents could lead to doubt or a loss of faith. A Catholic with a weak or poorly formed faith could be endangered by reading them uncritically. The sin would come from the internal rejection of Catholic truth with the required full knowledge and consent, not the physical act of reading itself.