The Mishnaic tractate "Avot" consists of five chapters. It begins with an order of transmission of the Oral Tradition; Moses receives the Torah at Mount Sinai and then transmits it through various generations (including Joshua, the Elders, and the Neviim, but notably not the Kohanim), whence it finally arrives at the Great Assembly, i.e., the Rabbis (Avot 1:1). It contains sayings attributed to sages from Simon the Just (200 BCE) to shortly after Judah haNasi (200 CE), redactor of the Mishnah. These aphorisms concern proper ethical and social conduct, as well as the importance of Torah study.