The article presents a case study of the anthropology of the members of the clan Chhetris in the Kathmandu Valley in Nepal, with particular focus given to their tacit knowledge in the everyday activities in their households configured into forms of mandalas. An overview on the lifeworld of the clan members is presented. The author suggests that Chhetris' tacit knowledge in their mandalas is multifaceted-corporeal, social, and cosmological.