 In each age, asserts the text, the Vedas are arranged into four, it is challenged, and this has happened twenty eight times already.Each time, a Veda-Vyasa appears and he diligently organizes the eternal knowledge, with the aid of his students.After presenting the emergence of Vedic schools, the text presents the ethical duties of the four varnas in chapter 2.8, the four Ashrama (stages) of the life of each human being in chapter 2.9, the rites of passage including wedding rituals in chapters 2.10 through 2.12, and Shraddha (rites in honor of ancestors, faith) in chapters 2.13 through 2.16.