異教名。白蓮教之支流，起於清初。其祖曰楊萊如，山東即墨縣人，明萬歷進士。明亡後，從勞山程楊旺學道，後傳道於燕齊間，遂立在理教。在理者，言在儒釋道三教之理中，奉佛教之法，修道教之行，習儒教之禮也。不設像，不焚香，戒煙酒，不禁茹葷。多用咒歌偈語，北人頗信奉之。
The Tsai-li secret society, an offshoot of the White Lily Society, was founded in Shantung at the beginning of the Ch'ing dynasty; the title 'in the li, ' indicating that the society associated itself with all three religions, Confucianism, Taoism, and Buddhism; its followers set up no images, burnt no incense, neither smoked nor drank, and were vegetarian.