We must now consider the vices opposed to knowledge and understanding. Since, however, we have treated of ignorance which is opposed to knowledge, when we were discussing the causes of sins ([2421]FS, Q[76]), we must now inquire about blindness of mind and dulness of sense, which are opposed to the gift of understanding; and under this head there are three points of inquiry: (1) Whether blindness of mind is a sin? (2) Whether dulness of sense is a sin distinct from blindness of mind? (3) Whether these vices arise from sins of the flesh? |