Seven deadly sins who identified seven or eight evil thoughts or spirits that one needed to overcome. Evagrius' pupil John Cassian, with his book "The Institutes," brought the classification to Europe, where it became fundamental to Catholic confessional practices as evident in penitential manuals, sermons like "The Parson's Tale" from Chaucer's "Canterbury Tales," and artworks like Dante's "Purgatory" (where the penitents of Mount Purgatory are depicted as being grouped and penanced according to the worst capital sin they committed). The Catholic Church used the concept of the deadly sins in order to help people curb their inclination towards evil before dire consequences and
Seven deadly sins Western tradition's spiritual pietas (or Catholic devotions), as follows: These "evil thoughts" can be categorized into three types: In AD 590 Pope Gregory I revised this list to form the more common list. Gregory combined "tristitia" with "acedia", and "vanagloria" with "superbia", and added "envy," in Latin, "invidia". Gregory's list became the standard list of sins. Thomas Aquinas uses and defends Gregory's list in his "Summa Theologica" although he calls them the "capital sins" because they are the head and form of all the others. The Anglican Communion, Lutheran Church, and Methodist Church, among other Christian denominations, continue to retain