I am almost finished with chapter two of From Priestly Torah to Pentateuch. In this chapter, Nihan moves from source criticism to a discussion of the structure of Leviticus. He critiques prior ideas about its outline. Among these are several theories that see Leviticus structured in a ring centering on Leviticus 16, such as that proposed by Mary Douglas in Leviticus as Literature. Personally, I have never found such ring theories to be particularly convincing for Leviticus, as I have trouble imagining the authors and redactors working this way, especially given the amount of complexity some scholars have seen in the ring structure.
Nihan does not like the ring structure either. Instead, he proposes a threefold division into chapters 1-10, 11-16, and 17-27. This is nothing particularly new. What is new, however, is his discussion of the narrative logic that lies behind this division.
Nihan points out that Exodus ends with an unresolved issue: the gap between God and the people of Israel. As Nihan puts it,
After the completion of Israel’s sanctuary . . . Moses is not allowed inside the tent specifically because the latter is filled with the divine presence . . . . In other words, although he is present among his people as promised in 25:8 and 29:45, Yahweh cannot be approached, even by Moses, and the gap between God and man remains insuperable. [emphasis original]1
Leviticus begins with this gap in place, but God begins to speak to Moses from within the tabernacle for the first time. Leviticus 1-7 give the rules for approaching God with sacrifices, and this culminates in Moses and Aaron being admitted to the tabernacle in Leviticus 8-9.
A similar problem is raised by Leviticus 10, namely the unauthorized sacrifice of Nadab and Abihu. Their offerings pollute the tabernacle, both because they offer unholy fire and because their corpses are found within the confines of the sacred space. Leviticus 11-16 provides the solution for this. It contains laws that are intended to prevent the contamination of the tabernacle (and later the temple), and it ends with the ritual that cleanses the temple from any defilement that may occur.
Finally, Nihan points to an interesting theological move that Leviticus makes. In Exodus, God appears on Mt. Sinai at times of God’s choosing, and then only Moses may approach (at least in P). With Leviticus 16, however, this changes:
[F]inally, Aaron is permitted inside the inner–sanctum (16:13ff.), where Yahweh appears to him inside the cloud (cf.16:2b?, ?), thus recalling the previous encounter between God and Moses on the mountain in Ex 24:15-18. — except that Aaron has now replaced Moses in the role of the communities mediator, and that this encounter is no longer unique but part of a yearly ritual (cf.16:29, 34a). [emphasis original]2
This is a remarkable reading of Leviticus, and it casts a wonderful light on P’s theology concerning the role of priests within the community of Israel.