On a literal story level, the Book of Vayikra reveals the laws of living a pure and holy life. We read about the building of a Tabernacle in the wilderness, the different sacrificial offerings; the Priestly garments and roles, knowing what to eat and what is unfit; and what relationships are forbidden. The holidays of Passover, Shavuot, Rosh Hashanah, Yom Kippur and Sukkot are also mentioned, as is the Jubilee Year, the Shabbat, and the Sabbatical Year. However, Rav Berg reminds us that the purpose of the Bible is not religion, instead the Bible is a code that describes the spiritual machinations of this physical world. He says: "The essential reason of sacrifice is not to appease God but to cleanse ourselves; to clean ourselves of corrupted DNA that we brought upon ourselves."