How the Seven Deadly Sins Began as ‘Eight Evil Thoughts’ The idea of listing the vices began in the fourth century. Becky Little DeAgostini/Getty Images Published: March 25, 2021 Last Updated: May 28, 2025 In the fourth century, a Christian monk named Evagrius Ponticus wrote down what’s known as the “eight evil thoughts”: gluttony, lust, avarice, anger, sloth, sadness, vainglory and pride. Evagrius wasn’t writing for a general audience. As an ascetic monk in the Eastern Christian church, he was writing to other monks about how these eight thoughts could interfere with their spiritual practice. Evagrius’ student, John Cassian, brought these ideas to the Western church, where they were translated from Greek to Latin. In the sixth century, St. Gregory the Great—who would become Pope Gregory I—rearranged them in his commentary on the Book of Job, removing “sloth” and adding “envy.” Instead of giving “pride” its own place on the list, he described it as the ruler of the other seven...